def evaluate(self,
cmds,
verbose=True,
log=True,
logger=None,
timeout=None,
pre_call='',
post_call=''):
"""Perform the low-level interaction with an Scilab Session
"""
self.logger = logger
if not timeout is None:
self.set_timeout(timeout)
if not self.proc:
raise Scilab2PyError('Session Closed, try a restart()')
if self._first:
self.write("""
try
getd(".");
catch
end
""")
if os.path.exists(self.outfile):
try:
os.remove(self.outfile)
except OSError as e:
self.logger.debug(e)
outfile = self.outfile
# use ascii code 2 for start of text, 3 for end of text, and
# 24 to signal an error
expr = '\n'.join(cmds)
# scilab cannot handle "#" commented lines
# try and remove them
expr = re.sub(r'[\A\n]\s*#', '//', expr)
# use ascii code 2 for start of text, 3 for end of text, and
# 24 to signal an error
output = """
%(pre_call)s
clear("ans");
clear("a__");
clear("_ans");
try
disp(char(2));
%(expr)s
if exists("ans") == 1 then
_ans = ans;
end
catch
disp(lasterror());
disp(char(24));
end
if exists("_ans") == 1
if type(_ans) == 4 then
_ans = double(_ans)
end
if or(type(_ans) == [1,2,3,5,6,7,8,10]) then
if exists("a__") == 0 then
try
savematfile -v6 %(outfile)s _ans;
catch
disp(_ans)
end
end
elseif type(_ans)
disp(_ans);
end
end
%(post_call)s
disp(char(3))
""" % locals()
if len(cmds) == 5:
main_line = cmds[2].strip()
else:
main_line = '\n'.join(cmds)
self.logger.debug(output)
self.write(output + '\n')
if self._first:
self.expect(chr(2))
else:
self.expect(chr(2), timeout=1)
self._first = False
debug_prompt = ("Type 'resume' or 'abort' to return to "
"standard level prompt.")
resp = []
while 1:
line = self.readline()
if chr(3) in line:
break
elif chr(24) in line:
msg = ('Scilab2Py tried to run:\n"""\n{0}\n"""\n'
'Scilab returned:\n{1}'.format(main_line,
'\n'.join(resp)))
raise Scilab2PyError(msg)
elif line.strip() == debug_prompt:
self.interact('-1->')
if verbose and logger:
logger.info(line)
elif log and logger:
logger.debug(line)
if resp or line.strip():
resp.append(line)
return '\n'.join(resp).rstrip()
def eval(self,
cmds,
verbose=True,
timeout=None,
log=True,
plot_dir=None,
plot_name='plot',
plot_format='png',
plot_width=620,
plot_height=590,
return_both=False):
"""
Perform Scilab command or commands.
Parameters
----------
cmd : str or list
Commands(s) to pass directly to Scilab.
verbose : bool, optional
Log Scilab output at info level.
timeout : float
Time to wait for response from Scilab (per character).
plot_dir: str, optional
If specificed, save the session's plot figures to the plot
directory instead of displaying the plot window.
plot_name : str, optional
Saved plots will start with `plot_name` and
end with "_%%.xxx' where %% is the plot number and
xxx is the `plot_format`.
plot_format: str, optional
The format in which to save the plot (PNG by default).
plot_width: int, optional
The plot with in pixels.
plot_height: int, optional
The plot height in pixels.
return_both : bool, optional
If True, return an (printed output, value) tuple. If "ans =" is in the printed output,
the printed output will have that portion removed.
Returns
-------
out : str
Results printed by Scilab.
Raises
------
Scilab2PyError
If the command(s) fail.
"""
if not self._session:
raise Scilab2PyError('No Scilab Session')
if isinstance(cmds, (str, unicode)):
cmds = [cmds]
if verbose and log:
[self.logger.info(line) for line in cmds]
elif log:
[self.logger.debug(line) for line in cmds]
if timeout is None:
timeout = self.timeout
pre_call = ''
post_call = ''
pre_call += '''
h = gdf();
h.figure_position = [0, 0];
h.figure_size = [%(plot_width)s,%(plot_height)s];
h.axes_size = [%(plot_width)s * 0.98, %(plot_height)s * 0.8];
''' % locals()
if not plot_dir is None:
plot_dir = plot_dir.replace("\\", "/")
spec = '%(plot_dir)s/%(plot_name)s*.%(plot_format)s' % locals()
existing = glob.glob(spec)
plot_offset = len(existing)
pre_call += '''
close all;
function handle_all_fig()
ids_array=winsid();
for i=1:length(ids_array)
id=ids_array(i);
outfile = sprintf('%(plot_dir)s/__ipy_sci_fig_%%03d', i + %(plot_offset)s);
if '%(plot_format)s' == 'jpg' then
xs2jpg(id, outfile + '.jpg');
elseif '%(plot_format)s' == 'jpeg' then
xs2jpg(id, outfile + '.jpeg');
elseif '%(plot_format)s' == 'png' then
xs2png(id, outfile);
else
xs2svg(id, outfile);
end
close(get_figure_handle(id));
end
endfunction
''' % locals()
post_call += 'handle_all_fig();'
try:
resp = self._session.evaluate(cmds,
verbose,
log,
self.logger,
timeout=timeout,
pre_call=pre_call,
post_call=post_call)
except KeyboardInterrupt:
self.restart()
raise Scilab2PyError('Session Interrupted, Restarting')
outfile = self._reader.out_file
data = None
if os.path.exists(outfile) and os.stat(outfile).st_size:
try:
data = self._reader.extract_file()
except (TypeError, IOError) as e:
self.logger.debug(e)
resp = resp.strip()
if resp:
if verbose:
print(resp)
self.logger.info(resp)
if return_both:
return resp, data
else:
return data
def _call(self, func, *inputs, **kwargs):
"""
Scilab2Py Parameters
----------
inputs : array_like
Variables to pass to the function.
nout : int, optional
Number of output arguments.
This is set automatically based on the number of
return values requested.
You can override this behavior by passing a
different value.
verbose : bool, optional
Log Scilab output at info level.
plot_dir: str, optional
If specificed, save the session's plot figures to the plot
directory instead of displaying the plot window.
plot_name : str, optional
Saved plots will start with `plot_name` and
end with "_%%.xxx' where %% is the plot number and
xxx is the `plot_format`.
plot_format: str, optional
The format in which to save the plot (PNG by default).
kwargs : dictionary, optional
Key - value pairs to be passed as prop - value inputs to the
function. The values must be strings or numbers.
Returns
-------
out : value
Value returned by the function.
Raises
------
Scilab2PyError
If the function call is unsucessful.
Notes
-----
Integer type arguments will be converted to floating point
unless `convert_to_float=False`.
"""
nout = kwargs.pop('nout', get_nout())
argout_list = ['ans']
if '=' in func:
nout = 0
# these three lines will form the commands sent to Scilab
# load("-v6", "infile", "invar1", ...)
# [a, b, c] = foo(A, B, C)
# save("-v6", "outfile", "outvar1", ...)
load_line = call_line = save_line = ''
prop_vals = []
eval_kwargs = {}
for (key, value) in kwargs.items():
if key in ['verbose', 'timeout'] or key.startswith('plot_'):
eval_kwargs[key] = value
continue
if isinstance(value, (str, unicode, int, float)):
prop_vals.append('"%s", %s' % (key, repr(value)))
else:
msg = 'Keyword arguments must be a string or number: '
msg += '%s = %s' % (key, value)
raise Scilab2PyError(msg)
prop_vals = ', '.join(prop_vals)
if nout:
# create a dummy list of var names ("a", "b", "c", ...)
# use ascii char codes so we can increment
argout_list, save_line = self._reader.setup(nout)
call_line = '[{0}] = '.format(', '.join(argout_list))
call_line += func + '('
if inputs:
argin_list, load_line = self._writer.create_file(inputs)
call_line += ', '.join(argin_list)
if prop_vals:
if inputs:
call_line += ', '
call_line += prop_vals
call_line += ');'
# create the command and execute in octave
cmd = [load_line, call_line, save_line]
data = self.eval(cmd, **eval_kwargs)
if isinstance(data, dict) and not isinstance(data, Struct):
data = [data.get(v, None) for v in argout_list]
if len(data) == 1 and data[0] is None:
data = None
return data