Ejemplo n.º 1
0
Archivo: gui.py Proyecto: Acellera/htmd
def show_progressbar(bar, show_eta=True, force=False):
    """ shows given bar either using an ipython widget, if in
    interactive session or simply use the string format of it and print it
    to stdout.

    Parameters
    ----------
    bar : instance of pyemma.util.progressbar.ProgressBar
    show_eta : bool (optional)

    """
    currtime = time.time()
    if bar.lastupdate is not None and not force:
        dtlastupdate = currtime - bar.lastupdate
    else:
        dtlastupdate = 9999
    #if not (str(config['show_progress_bars']) == 'True' and __is_tty_or_interactive_session() and dtlastupdate > 0.5):
    if not (__is_tty_or_interactive_session() and dtlastupdate > 0.5):
        return
    bar.lastupdate = currtime

    # note: this check ensures we have IPython.display and so on.
    if ipython_notebook_session:
        # create IPython widgets on first call
        if not hasattr(bar, 'widget'):
            box = Box()
            text = Text()
            progress_widget = IntProgress()

            box.children = [text, progress_widget]
            bar.widget = box
            widget = box

            # make it visible once
            display(box)

            # update css for a more compact view
            progress_widget._css = [
                ("div", "margin-top", "0px")
            ]
            progress_widget.height = "8px"
        else:
            widget = bar.widget

        # update widgets slider value and description text
        desc = bar.description
        desc += ':\t({}/{})'.format(bar.numerator, bar.denominator)
        if show_eta:
            desc += ':\tETA:' + bar._generate_eta(bar._eta.eta_seconds)
        assert isinstance(widget.children[0], Text)
        assert isinstance(widget.children[1], IntProgress)
        widget.children[0].placeholder = desc
        widget.children[1].value = bar.percent
    else:
        sys.stdout.write("\r" + str(bar))
        sys.stdout.flush()
Ejemplo n.º 2
0
def show_progressbar(bar, show_eta=True, force=False):
    """ shows given bar either using an ipython widget, if in
    interactive session or simply use the string format of it and print it
    to stdout.

    Parameters
    ----------
    bar : instance of pyemma.util.progressbar.ProgressBar
    show_eta : bool (optional)

    """
    currtime = time.time()
    if bar.lastupdate is not None and not force:
        dtlastupdate = currtime - bar.lastupdate
    else:
        dtlastupdate = 9999
    #if not (str(config['show_progress_bars']) == 'True' and __is_tty_or_interactive_session() and dtlastupdate > 0.5):
    if not (__is_tty_or_interactive_session() and dtlastupdate > 0.5):
        return
    bar.lastupdate = currtime

    # note: this check ensures we have IPython.display and so on.
    if ipython_notebook_session:
        # create IPython widgets on first call
        if not hasattr(bar, 'widget'):
            box = Box()
            text = Text()
            progress_widget = IntProgress()

            box.children = [text, progress_widget]
            bar.widget = box
            widget = box

            # make it visible once
            display(box)

            # update css for a more compact view
            progress_widget._css = [("div", "margin-top", "0px")]
            progress_widget.height = "8px"
        else:
            widget = bar.widget

        # update widgets slider value and description text
        desc = bar.description
        desc += ':\t({}/{})'.format(bar.numerator, bar.denominator)
        if show_eta:
            desc += ':\tETA:' + bar._generate_eta(bar._eta.eta_seconds)
        assert isinstance(widget.children[0], Text)
        assert isinstance(widget.children[1], IntProgress)
        widget.children[0].placeholder = desc
        widget.children[1].value = bar.percent
    else:
        sys.stdout.write("\r" + str(bar))
        sys.stdout.flush()
Ejemplo n.º 3
0
    def __init__(self,start,end):

        self.pbar = IntProgress(orientation='horizontal',min=start, max=end)
        self.ptext = HTML()
        # Only way to place text to the right of the bar is to use a container
        container = HBox(children=[self.pbar, self.ptext])
        display(container)
Ejemplo n.º 4
0
    def __init__(self,
                 maxval=None,
                 widgets=None,
                 term_width=None,
                 poll=1,
                 left_justify=True,
                 fd=sys.stderr):
        """Initializes a progress bar with sane defaults."""

        # Don't share a reference with any other progress bars
        if widgets is None:
            widgets = list(self._DEFAULT_WIDGETS)

        self.maxval = maxval
        self.widgets = widgets
        self.fd = fd
        self.left_justify = left_justify

        self.signal_set = False
        if term_width is not None:
            self.term_width = term_width
        else:
            try:
                self._handle_resize()
                signal.signal(signal.SIGWINCH, self._handle_resize)
                self.signal_set = True
            except (SystemExit, KeyboardInterrupt) as e:
                raise e
            except:
                self.term_width = self._env_size()

        self.__iterable = None
        self._update_widgets()
        self.currval = 0
        self.finished = False
        self.last_update_time = None
        self.poll = poll
        self.seconds_elapsed = 0
        self.start_time = None
        self.update_interval = 1
        self.next_update = 0
        self.bar_widget = None
        self.container_widget = None
        if ipython:
            self.bar_widget = IntProgress()
            self.container_widget = HBox()
            self.container_widget.align = "center"
            display(self.container_widget)
            children = []
            for widget_type in self.widgets:
                if isinstance(widget_type, pbar_widgets.WidgetHFill):
                    children.append(self.bar_widget)
                else:
                    text_widget = Latex()
                    children.append(text_widget)
            self.container_widget.children = children
Ejemplo n.º 5
0
def __attached_to_ipy_notebook():
    import warnings
    with warnings.catch_warnings():
        warnings.simplefilter("ignore")
        try:
            from IPython.html.widgets import IntProgress
            IntProgress(100)
        except:
            return False
        else:
            return True
Ejemplo n.º 6
0
    def status_printer(_, total=None, desc=None, ncols=None, img=None):
        """
        Manage the printing of an IPython/Jupyter Notebook progress bar widget.
        """
        # Fallback to text bar if there's no total
        # DEPRECATED: replaced with an 'info' style bar
        # if not total:
        #    return super(mytqdm, mytqdm).status_printer(file)

        # fp = file

        # Prepare IPython progress bar
        try:
            if total:
                pbar = IntProgress(min=0, max=total)
            else:  # No total? Show info style bar with no progress tqdm status
                pbar = IntProgress(min=0, max=1)
                pbar.value = 1
                pbar.bar_style = 'info'
        except NameError:
            # #187 #451 #558
            raise ImportError(
                "IntProgress not found. Please update jupyter and ipywidgets."
                " See https://ipywidgets.readthedocs.io/en/stable"
                "/user_install.html")

        if desc:
            pbar.description = desc
            if IPYW >= 7:
                pbar.style.description_width = 'initial'
        # Prepare status text
        ptext = HTML()
        timg = HTML()
        if img:
            timg.value = "<br>%s<br>" % img
        # Only way to place text to the right of the bar is to use a container
        container = VBox([HBox(children=[pbar, ptext]), timg])
        # Prepare layout
        if ncols is not None:  # use default style of ipywidgets
            # ncols could be 100, "100px", "100%"
            ncols = str(ncols)  # ipywidgets only accepts string
            try:
                if int(ncols) > 0:  # isnumeric and positive
                    ncols += 'px'
            except ValueError:
                pass
            pbar.layout.flex = '2'
            container.layout.width = ncols
            container.layout.display = 'inline-flex'
            container.layout.flex_flow = 'row wrap'
        display(container)

        return container
Ejemplo n.º 7
0
    def status_printer(self, _, total=None, desc=None, ncols=None):
        """
        Manage the printing of an IPython/Jupyter Notebook progress bar widget.
        """
        # Fallback to text bar if there's no total
        # DEPRECATED: replaced with an 'info' style bar
        # if not total:
        #    return super(tqdm_notebook_EX, tqdm_notebook).status_printer(file)

        # fp = file

        # Prepare IPython progress bar
        if total:
            pbar = IntProgress(min=0, max=total)
        else:  # No total? Show info style bar with no progress tqdm status
            pbar = IntProgress(min=0, max=1)
            pbar.value = 1
            pbar.bar_style = 'info'
        if desc:
            pbar.description = desc
        # Prepare status text
        ptext = HTML()
        # Only way to place text to the right of the bar is to use a container
        container = HBox(children=[pbar, ptext])
        if self.vbox:
            self.vbox.children = self.vbox.children + (container, )
        else:
            display(container)
        # Prepare layout
        if ncols is not None:  # use default style of ipywidgets
            # ncols could be 100, "100px", "100%"
            ncols = str(ncols)  # ipywidgets only accepts string
            if ncols[-1].isnumeric():
                # if last value is digit, assume the value is digit
                ncols += 'px'
            pbar.layout.flex = '2'
            container.layout.width = ncols
            container.layout.display = 'inline-flex'
            container.layout.flex_flow = 'row wrap'

        def print_status(s='', close=False, bar_style=None, desc=None):
            # Note: contrary to native tqdm, s='' does NOT clear bar
            # goal is to keep all infos if error happens so user knows
            # at which iteration the loop failed.

            # Clear previous output (really necessary?)
            # clear_output(wait=1)

            # Get current iteration value from format_meter string
            if total:
                # n = None
                if s:
                    npos = s.find(r'/|/')  # cause we use bar_format=r'{n}|…'
                    # Check that n can be found in s (else n > total)
                    if npos >= 0:
                        n = int(s[:npos])  # get n from string
                        s = s[npos + 3:]  # remove from string

                        # Update bar with current n value
                        if n is not None:
                            pbar.value = n

            # Print stats
            if s:  # never clear the bar (signal: s='')
                s = s.replace('||', '')  # remove inesthetical pipes
                s = escape(s)  # html escape special characters (like '?')
                ptext.value = s

            # Change bar style
            if bar_style:
                # Hack-ish way to avoid the danger bar_style being overriden by
                # success because the bar gets closed after the error…
                if not (pbar.bar_style == 'danger' and bar_style == 'success'):
                    pbar.bar_style = bar_style

            # Special signal to close the bar
            if close and pbar.bar_style != 'danger':  # hide only if no error
                try:
                    container.close()
                except AttributeError:
                    container.visible = False
                if self.vbox:
                    self.vbox.children = tuple(ch for ch in self.vbox.children
                                               if ch is not container)

            # Update description
            if desc:
                pbar.description = desc

        return print_status
    def status_printer(_, total=None, desc=None):
        """
        Manage the printing of an IPython/Jupyter Notebook progress bar widget.
        """
        # Fallback to text bar if there's no total
        # DEPRECATED: replaced with an 'info' style bar
        # if not total:
        #    return super(tqdm_notebook, tqdm_notebook).status_printer(file)

        # fp = file

        # Prepare IPython progress bar
        if total:
            pbar = IntProgress(min=0, max=total)
        else:  # No total? Show info style bar with no progress tqdm status
            pbar = IntProgress(min=0, max=1)
            pbar.value = 1
            pbar.bar_style = 'info'
        if desc:
            pbar.description = desc
        # Prepare status text
        ptext = HTML()
        # Only way to place text to the right of the bar is to use a container
        container = HBox(children=[pbar, ptext])
        display(container)

        def print_status(s='', close=False, bar_style=None):
            # Note: contrary to native tqdm, s='' does NOT clear bar
            # goal is to keep all infos if error happens so user knows
            # at which iteration the loop failed.

            # Clear previous output (really necessary?)
            # clear_output(wait=1)

            # Get current iteration value from format_meter string
            if total:
                n = None
                if s:
                    npos = s.find(r'/|/')  # cause we use bar_format=r'{n}|...'
                    # Check that n can be found in s (else n > total)
                    if npos >= 0:
                        n = int(s[:npos])  # get n from string
                        s = s[npos + 3:]  # remove from string

                        # Update bar with current n value
                        if n is not None:
                            pbar.value = n

            # Print stats
            if s:  # never clear the bar (signal: s='')
                s = s.replace('||', '')  # remove inesthetical pipes
                s = escape(s)  # html escape special characters (like '?')
                ptext.value = s

            # Change bar style
            if bar_style:
                # Hack-ish way to avoid the danger bar_style being overriden by
                # success because the bar gets closed after the error...
                if not (pbar.bar_style == 'danger' and bar_style == 'success'):
                    pbar.bar_style = bar_style

            # Special signal to close the bar
            if close and pbar.bar_style != 'danger':  # hide only if no error
                container.visible = False

        return print_status
Ejemplo n.º 9
0
def int_progress(min_, max_):
    prog = IntProgress(min=min_, max=max_)
    display(prog)
    for i in linspace(min_, max_, 25):
        time.sleep(0.1)
        prog.value = i
Ejemplo n.º 10
0
    def __init__(self,
                 model,
                 opt,
                 maxiters,
                 verbose=False,
                 current_iteration=0,
                 ipython_notebook=True,
                 clear_after_finish=False):
        self.verbose = verbose
        if self.verbose:
            self.model = model
            self.iteration = current_iteration
            self.p_iter = self.iteration
            self.maxiters = maxiters
            self.len_maxiters = len(str(maxiters))
            self.opt_name = opt.opt_name
            self.model.add_observer(self, self.print_status)
            self.status = 'running'
            self.clear = clear_after_finish

            self.update()

            try:
                from IPython.display import display
                from IPython.html.widgets import IntProgress, HTML, Box, VBox, HBox, FlexBox
                self.text = HTML(width='100%')
                self.progress = IntProgress(min=0, max=maxiters)
                #self.progresstext = Text(width='100%', disabled=True, value='0/{}'.format(maxiters))
                self.model_show = HTML()
                self.ipython_notebook = ipython_notebook
            except:
                # Not in Ipython notebook
                self.ipython_notebook = False

            if self.ipython_notebook:
                left_col = VBox(children=[self.progress, self.text],
                                padding=2,
                                width='40%')
                right_col = Box(children=[self.model_show],
                                padding=2,
                                width='60%')
                self.hor_align = FlexBox(children=[left_col, right_col],
                                         width='100%',
                                         orientation='horizontal')

                display(self.hor_align)

                try:
                    self.text.set_css('width', '100%')
                    left_col.set_css({
                        'padding': '2px',
                        'width': "100%",
                    })

                    right_col.set_css({
                        'padding': '2px',
                    })

                    self.hor_align.set_css({
                        'width': "100%",
                    })

                    self.hor_align.remove_class('vbox')
                    self.hor_align.add_class('hbox')

                    left_col.add_class("box-flex1")
                    right_col.add_class('box-flex0')

                except:
                    pass

                #self.text.add_class('box-flex2')
                #self.progress.add_class('box-flex1')
            else:
                self.exps = exponents(self.fnow, self.current_gradient)
                print('Running {} Code:'.format(self.opt_name))
                print('  {3:7s}   {0:{mi}s}   {1:11s}    {2:11s}'.format(
                    "i", "f", "|g|", "runtime", mi=self.len_maxiters))
Ejemplo n.º 11
0
 def __init__(self, max_v):
     if with_notebook:
         self.pb = IntProgress(value=0, max=max_v)
         display(self.pb)
Ejemplo n.º 12
0
## Test if we're running inside IPython
## ------------------------------------
try:
    __IPYTHON__
    from IPython.display import display, HTML
    with_ipython = True
except NameError:
    with_ipython = False

warnings.filterwarnings('ignore')
with warnings.catch_warnings():
    try:
        from IPython.display import display, clear_output
        from IPython.html.widgets import IntProgress
        w = IntProgress()
        with_notebook = True
    except (NameError, AttributeError, ImportError, TraitError):
        with_notebook = False

ldtk_root = os.getenv('LDTK_ROOT') or join(os.getenv('HOME'), '.ldtk')
ldtk_cache = join(ldtk_root, 'cache')
ldtk_server_file_list = join(ldtk_root, 'server_file_list.pkl')

if not exists(ldtk_root):
    os.mkdir(ldtk_root)
if not exists(ldtk_cache):
    os.mkdir(ldtk_cache)

## Constants
## =========
# In[7]:

lbview = c.load_balanced_view()


# In[8]:

results = lbview.map_async(process_folder, SOI[:2])


# In[9]:

from IPython.html.widgets import IntProgress
from IPython.display import display


# In[10]:

from time import sleep
prog = IntProgress(min=0, max=len(SOI)+1)
display(prog)
while not results.ready():
    prog.value = results.progress
    sleep(5)


# In[ ]:



Ejemplo n.º 14
0
    def status_printer(_, total=None, desc=None, ncols=None):
        """
        Manage the printing of an IPython/Jupyter Notebook progress bar widget.
        """
        # Fallback to text bar if there's no total
        # DEPRECATED: replaced with an 'info' style bar
        # if not total:
        #    return super(tqdm_notebook, tqdm_notebook).status_printer(file)

        # fp = file

        # Prepare IPython progress bar
        try:
            if total:
                pbar = IntProgress(min=0, max=total)
            else:  # No total? Show info style bar with no progress tqdm status
                pbar = IntProgress(min=0, max=1)
                pbar.value = 1
                pbar.bar_style = 'info'
        except NameError:
            # #187 #451 #558
            raise ImportError(
                "IntProgress not found. Please update jupyter and ipywidgets."
                " See https://ipywidgets.readthedocs.io/en/stable"
                "/user_install.html")

        if desc:
            pbar.description = desc
        # Prepare status text
        ptext = HTML()
        # Only way to place text to the right of the bar is to use a container
        container = HBox(children=[pbar, ptext])
        # Prepare layout
        if ncols is not None:  # use default style of ipywidgets
            # ncols could be 100, "100px", "100%"
            ncols = str(ncols)  # ipywidgets only accepts string
            if ncols[-1].isnumeric():
                # if last value is digit, assume the value is digit
                ncols += 'px'
            pbar.layout.flex = '2'
            container.layout.width = ncols
            container.layout.display = 'inline-flex'
            container.layout.flex_flow = 'row wrap'
        display(container)

        def print_status(s='', close=False, bar_style=None, desc=None):
            # Note: contrary to native tqdm, s='' does NOT clear bar
            # goal is to keep all infos if error happens so user knows
            # at which iteration the loop failed.

            # Clear previous output (really necessary?)
            # clear_output(wait=1)

            # Get current iteration value from format_meter string
            if total:
                # n = None
                if s:
                    npos = s.find(r'/|/')  # cause we use bar_format=r'{n}|...'
                    # Check that n can be found in s (else n > total)
                    if npos >= 0:
                        n = int(s[:npos])  # get n from string
                        s = s[npos + 3:]  # remove from string

                        # Update bar with current n value
                        if n is not None:
                            pbar.value = n

            # Print stats
            if s:  # never clear the bar (signal: s='')
                s = s.replace('||', '')  # remove inesthetical pipes
                s = escape(s)  # html escape special characters (like '?')
                ptext.value = s

            # Change bar style
            if bar_style:
                # Hack-ish way to avoid the danger bar_style being overriden by
                # success because the bar gets closed after the error...
                if not (pbar.bar_style == 'danger' and bar_style == 'success'):
                    pbar.bar_style = bar_style

            # Special signal to close the bar
            if close and pbar.bar_style != 'danger':  # hide only if no error
                try:
                    container.close()
                except AttributeError:
                    container.visible = False

            # Update description
            if desc:
                pbar.description = desc

        return print_status
    def status_printer(_, total=None, desc=None):
        """
        Manage the printing of an IPython/Jupyter Notebook progress bar widget.
        """
        # Fallback to text bar if there's no total
        # DEPRECATED: replaced with an 'info' style bar
        # if not total:
        #    return super(tqdm_notebook, tqdm_notebook).status_printer(file)

        # fp = file

        # Prepare IPython progress bar
        if total:
            pbar = IntProgress(min=0, max=total)
        else:  # No total? Show info style bar with no progress tqdm status
            pbar = IntProgress(min=0, max=1)
            pbar.value = 1
            pbar.bar_style = 'info'
        if desc:
            pbar.description = desc
        # Prepare status text
        ptext = HTML()
        # Only way to place text to the right of the bar is to use a container
        container = HBox(children=[pbar, ptext])
        display(container)

        def print_status(s='', close=False, bar_style=None):
            # Note: contrary to native tqdm, s='' does NOT clear bar
            # goal is to keep all infos if error happens so user knows
            # at which iteration the loop failed.

            # Clear previous output (really necessary?)
            # clear_output(wait=1)

            # Get current iteration value from format_meter string
            if total:
                n = None
                if s:
                    npos = s.find(r'/|/')  # cause we use bar_format=r'{n}|...'
                    # Check that n can be found in s (else n > total)
                    if npos >= 0:
                        n = int(s[:npos])  # get n from string
                        s = s[npos + 3:]  # remove from string

                        # Update bar with current n value
                        if n is not None:
                            pbar.value = n

            # Print stats
            if s:  # never clear the bar (signal: s='')
                s = s.replace('||', '')  # remove inesthetical pipes
                s = escape(s)  # html escape special characters (like '?')
                ptext.value = s

            # Change bar style
            if bar_style:
                # Hack-ish way to avoid the danger bar_style being overriden by
                # success because the bar gets closed after the error...
                if not (pbar.bar_style == 'danger' and bar_style == 'success'):
                    pbar.bar_style = bar_style

            # Special signal to close the bar
            if close and pbar.bar_style != 'danger':  # hide only if no error
                container.visible = False

        return print_status
Ejemplo n.º 16
0
def nb_progress_display(results, objectlist, sleep=1):
    prog = IntProgress(min=0, max=len(objectlist))
    display(prog)
    while not results.ready():
        prog.value = results.progress
        time.sleep(sleep)
    def status_printer(_, total=None, desc=None, ncols=None):
        """
        Manage the printing of an IPython/Jupyter Notebook progress bar widget.
        """
        # Fallback to text bar if there's no total
        # DEPRECATED: replaced with an 'info' style bar
        # if not total:
        #    return super(tqdm_notebook, tqdm_notebook).status_printer(file)

        # fp = file

        # Prepare IPython progress bar
        try:
            if total:
                pbar = IntProgress(min=0, max=total)
            else:  # No total? Show info style bar with no progress tqdm status
                pbar = IntProgress(min=0, max=1)
                pbar.value = 1
                pbar.bar_style = 'info'
        except NameError:
            # #187 #451 #558
            raise ImportError(
                "IntProgress not found. Please update jupyter and ipywidgets."
                " See https://ipywidgets.readthedocs.io/en/stable"
                "/user_install.html")

        if desc:
            pbar.description = desc
            if IPYW >= 7:
                pbar.style.description_width = 'initial'
        # Prepare status text
        ptext = HTML()
        # Only way to place text to the right of the bar is to use a container
        container = HBox(children=[pbar, ptext])
        # Prepare layout
        if ncols is not None:  # use default style of ipywidgets
            # ncols could be 100, "100px", "100%"
            ncols = str(ncols)  # ipywidgets only accepts string
            try:
                if int(ncols) > 0:  # isnumeric and positive
                    ncols += 'px'
            except ValueError:
                pass
            pbar.layout.flex = '2'
            container.layout.width = ncols
            container.layout.display = 'inline-flex'
            container.layout.flex_flow = 'row wrap'
        display(container)

        def print_status(s='', close=False, bar_style=None, desc=None):
            # Note: contrary to native tqdm, s='' does NOT clear bar
            # goal is to keep all infos if error happens so user knows
            # at which iteration the loop failed.

            # Clear previous output (really necessary?)
            # clear_output(wait=1)

            # Get current iteration value from format_meter string
            if total:
                # n = None
                if s:
                    npos = s.find(r'/|/')  # cause we use bar_format=r'{n}|...'
                    # Check that n can be found in s (else n > total)
                    if npos >= 0:
                        n = float(s[:npos])  # get n from string
                        s = s[npos + 3:]  # remove from string

                        # Update bar with current n value
                        if n is not None:
                            pbar.value = n

            # Print stats
            if s:  # never clear the bar (signal: s='')
                s = s.replace('||', '')  # remove inesthetical pipes
                s = escape(s)  # html escape special characters (like '?')
                ptext.value = s

            # Change bar style
            if bar_style:
                # Hack-ish way to avoid the danger bar_style being overriden by
                # success because the bar gets closed after the error...
                if not (pbar.bar_style == 'danger' and bar_style == 'success'):
                    pbar.bar_style = bar_style

            # Special signal to close the bar
            if close and pbar.bar_style != 'danger':  # hide only if no error
                try:
                    container.close()
                except AttributeError:
                    container.visible = False

            # Update description
            if desc:
                pbar.description = desc
                if IPYW >= 7:
                    pbar.style.description_width = 'initial'

        return print_status
Ejemplo n.º 18
0
    def optimize(self,
                 method='HS',
                 maxiter=500,
                 ftol=1e-6,
                 gtol=1e-6,
                 step_length=1.,
                 callback=None,
                 verbose=True):
        """
        Optimize the model.

        The strategy is to run conjugate natural gradients on the variational
        parameters, interleaved with gradient based optimization of any
        non-variational parameters. self.hyperparam_interval dictates how
        often this happens.

        Arguments
        ---------
        :method: ['FR', 'PR','HS','steepest'] -- conjugate gradient method
        :maxiter: int
        :ftol: float
        :gtol: float
        :step_length: float

        """

        assert method in ['FR', 'PR', 'HS', 'steepest'
                          ], 'invalid conjugate gradient method specified.'

        ## For GPy style notebook verbosity

        if verbose:
            try:
                from IPython.display import display
                from IPython.html.widgets import IntProgress, HTML, Box, VBox, HBox, FlexBox
                self.text = HTML(width='100%')
                self.progress = IntProgress(min=0, max=maxiter)
                self.progress.bar_style = 'info'
                self.status = 'Running'

                html_begin = """<style type="text/css">
                .tg-opt  {font-family:"Courier New", Courier, monospace !important;padding:2px 3px;word-break:normal;border-collapse:collapse;border-spacing:0;border-color:#DCDCDC;margin:0px auto;width:100%;}
                .tg-opt td{font-family:"Courier New", Courier, monospace !important;font-weight:bold;color:#444;background-color:#F7FDFA;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:#DCDCDC;}
                .tg-opt th{font-family:"Courier New", Courier, monospace !important;font-weight:normal;color:#fff;background-color:#26ADE4;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:#DCDCDC;}
                .tg-opt .tg-left{font-family:"Courier New", Courier, monospace !important;font-weight:normal;text-align:left;}
                .tg-opt .tg-right{font-family:"Courier New", Courier, monospace !important;font-weight:normal;text-align:right;}
                </style>
                <table class="tg-opt">"""

                html_end = "</table>"

                self.ipython_notebook = True
            except:
                # Not in Ipython notebook
                self.ipython_notebook = False
        else:
            self.ipython_notebook = False

        if self.ipython_notebook:
            left_col = VBox(children=[self.progress, self.text],
                            padding=2,
                            width='100%')
            self.hor_align = FlexBox(children=[left_col],
                                     width='100%',
                                     orientation='horizontal')

            display(self.hor_align)

            try:
                self.text.set_css('width', '100%')
                left_col.set_css({
                    'padding': '2px',
                    'width': "100%",
                })

                self.hor_align.set_css({
                    'width': "100%",
                })

                self.hor_align.remove_class('vbox')
                self.hor_align.add_class('hbox')

                left_col.add_class("box-flex1")

            except:
                pass

        self.start = time.time()
        self._time = self.start

        ## ---

        iteration = 0
        bound_old = self.bound()
        searchDir_old = 0.
        iteration_failed = False
        while True:

            if callback is not None:
                callback()

            grad, natgrad = self.vb_grad_natgrad()
            grad, natgrad = -grad, -natgrad
            squareNorm = np.dot(natgrad, grad)  # used to monitor convergence

            #find search direction
            if (method == 'steepest') or not iteration:
                beta = 0
            elif (method == 'PR'):
                beta = np.dot((natgrad - natgrad_old), grad) / squareNorm_old
            elif (method == 'FR'):
                beta = squareNorm / squareNorm_old
            elif (method == 'HS'):
                beta = np.dot((natgrad - natgrad_old), grad) / np.dot(
                    (natgrad - natgrad_old), grad_old)
            if np.isnan(beta) or (beta < 0.):
                beta = 0.
            searchDir = -natgrad + beta * searchDir_old

            # Try a conjugate step
            phi_old = self.get_vb_param().copy()
            try:
                self.set_vb_param(phi_old + step_length * searchDir)
                bound = self.bound()
            except LinAlgError:
                self.set_vb_param(phi_old)
                bound = bound_old - 1

            iteration += 1

            # Make sure there's an increase in the bound, else revert to steepest, which is guaranteed to increase the bound.
            # (It's the same as VBEM.)
            if bound < bound_old:
                searchDir = -natgrad
                try:
                    self.set_vb_param(phi_old + step_length * searchDir)
                    bound = self.bound()
                except LinAlgError:
                    import warnings
                    warnings.warn(
                        "Caught LinalgError in setting variational parameters, trying to continue with old parameter settings",
                        LinAlgWarning)
                    self.set_vb_param(phi_old)
                    bound = self.bound()
                    iteration_failed = False
                iteration += 1

            if verbose:
                if self.ipython_notebook:

                    t = time.time()
                    seconds = t - self.start

                    self.status = 'Running'
                    self.progress.bar_style = 'info'

                    names_vals = [
                        ['conjugate gradient method', "{:s}".format(method)],
                        ['runtime', "{:.1f}s".format(seconds)],
                        ['evaluation', "{}".format(iteration)],
                        ['objective', "{:12.5f}".format(-bound)],
                        ['||gradient||', "{:12.5f}".format(float(squareNorm))],
                        ['beta', "{:12.5f}".format(beta)],
                        ['status', "{:s}".format(self.status)],
                    ]

                    html_body = ""
                    for name, val in names_vals:
                        html_body += "<tr>"
                        html_body += "<td class='tg-left'>{}</td>".format(name)
                        html_body += "<td class='tg-right'>{}</td>".format(val)
                        html_body += "</tr>"

                    self.progress.value = iteration
                    self.text.value = html_begin + html_body + html_end

                else:
                    print('\riteration ' + str(iteration) + ' bound=' +
                          str(bound) + ' grad=' + str(squareNorm) + ', beta=' +
                          str(beta))
                    sys.stdout.flush()

            # Converged yet? try the parameters if so
            if np.abs(bound - bound_old) <= ftol:
                if verbose:
                    if self.ipython_notebook:
                        self.status = 'vb converged (ftol)'
                        names_vals[-1] = ['status', "{:s}".format(self.status)]

                        html_body = ""
                        for name, val in names_vals:
                            html_body += "<tr>"
                            html_body += "<td class='tg-left'>{}</td>".format(
                                name)
                            html_body += "<td class='tg-right'>{}</td>".format(
                                val)
                            html_body += "</tr>"

                        self.text.value = html_begin + html_body + html_end
                        self.progress.bar_style = 'success'

                    else:
                        print('vb converged (ftol)')

                if self.optimize_parameters() < 1e-1:
                    break

            if squareNorm <= gtol:
                if verbose:
                    if self.ipython_notebook:
                        self.status = 'vb converged (gtol)'
                        names_vals[-1] = ['status', "{:s}".format(self.status)]

                        html_body = ""
                        for name, val in names_vals:
                            html_body += "<tr>"
                            html_body += "<td class='tg-left'>{}</td>".format(
                                name)
                            html_body += "<td class='tg-right'>{}</td>".format(
                                val)
                            html_body += "</tr>"

                        self.text.value = html_begin + html_body + html_end
                        self.progress.bar_style = 'success'

                    else:
                        print('vb converged (gtol)')

                if self.optimize_parameters() < 1e-1:
                    break

            if iteration >= maxiter:
                if verbose:
                    if self.ipython_notebook:
                        self.status = 'maxiter exceeded'
                        names_vals[-1] = ['status', "{:s}".format(self.status)]

                        html_body = ""
                        for name, val in names_vals:
                            html_body += "<tr>"
                            html_body += "<td class='tg-left'>{}</td>".format(
                                name)
                            html_body += "<td class='tg-right'>{}</td>".format(
                                val)
                            html_body += "</tr>"

                        self.text.value = html_begin + html_body + html_end
                        self.progress.bar_style = 'warning'

                    else:
                        print('maxiter exceeded')
                break

            #store essentials of previous iteration
            natgrad_old = natgrad.copy()  # copy: better safe than sorry.
            grad_old = grad.copy()
            searchDir_old = searchDir.copy()
            squareNorm_old = squareNorm

            # hyper param_optimisation
            if ((iteration > 1) and not (iteration % self.hyperparam_interval)
                ) or iteration_failed:
                self.optimize_parameters()

            bound_old = bound

        # Clean up temporary fields after optimization
        if self.ipython_notebook:
            del self.text
            del self.progress
            del self.hor_align