示例#1
0
 def __init__(self,
              uri=None,
              variable=None,
              interface_overload={},
              request_dataset=None):
     self.request_dataset = request_dataset
     if self.request_dataset is None:
         self.uri = uri
         self.variable = variable
         self.alias = None
         self.did = None
         if self.variable is None:
             try:
                 self.ds = None
                 rootgrp = nc.Dataset(uri)
                 self.meta = NcMetadata(rootgrp)
             finally:
                 rootgrp.close()
         else:
             from ocgis.api.request import RequestDataset
             kwds = {'uri': uri, 'variable': variable}
             kwds.update(interface_overload)
             rd = RequestDataset(**kwds)
             self.ds = NcDataset(request_dataset=rd)
             self.meta = self.ds.metadata
     else:
         self.uri = self.request_dataset.uri
         self.variable = self.request_dataset.variable
         self.ds = self.request_dataset.ds
         self.meta = self.request_dataset.ds.metadata
         self.alias = self.request_dataset.alias
         self.did = self.request_dataset.did
示例#2
0
 def test_get_lines(self):
     # test with a unicode string
     path = os.path.join(self.current_dir_output, 'foo.nc')
     with nc_scope(path, 'w') as ds:
         ds.foo = u'a bad \u2013 unicode character'
         md = NcMetadata(rootgrp=ds)
         ds.sync()
         lines = md.get_lines()
     self.assertEqual(lines[4], '// global attributes:')
示例#3
0
文件: inspect.py 项目: UV-CDAT/ocgis
 def __init__(self,uri=None,variable=None,interface_overload={},request_dataset=None):
     self.request_dataset = request_dataset
     if self.request_dataset is None:
         self.uri = uri
         self.variable = variable
         self.alias = None
         self.did = None
         if self.variable is None:
             try:
                 self.ds = None
                 rootgrp = nc.Dataset(uri)
                 self.meta = NcMetadata(rootgrp)
             finally:
                 rootgrp.close()
         else:
             from ocgis.api.request.base import RequestDataset
             kwds = {'uri':uri,'variable':variable}
             kwds.update(interface_overload)
             rd = RequestDataset(**kwds)
             self.ds = rd.get()
             self.meta = self.ds.meta
     else:
         self.uri = self.request_dataset.uri
         self.variable = self.request_dataset.variable
         self.ds = self.request_dataset.get()
         self.meta = self.ds.meta
         self.alias = self.request_dataset.alias
         self.did = self.request_dataset.did
示例#4
0
    def __init__(self, uri=None, variable=None, request_dataset=None, meta=None):
        if meta is None and uri is None and request_dataset is None:
            raise ValueError('At least one of "uri", "request_dataset", or "meta" must be provided.')

        self.uri = uri
        self.variable = variable
        self.meta = meta
        self.request_dataset = request_dataset

        if self.request_dataset is None and self.meta is None:
            if self.uri is not None and self.variable is not None:
                from ocgis.api.request.base import RequestDataset
                self.request_dataset = RequestDataset(uri=self.uri, variable=self.variable)

        self.alias = None
        self.did = None
        self.ds = None

        if self.request_dataset is None:
            if self.meta is None:
                rootgrp = nc.Dataset(self.uri)
                try:
                    self.meta = NcMetadata(rootgrp)
                finally:
                    rootgrp.close()
        else:
            self.uri = self.request_dataset.uri
            self.variable = self.request_dataset.variable
            self.ds = self.request_dataset.get()
            self.meta = self.ds.meta
            self.alias = self.request_dataset.alias
            self.did = self.request_dataset.did
示例#5
0
文件: inspect.py 项目: UV-CDAT/ocgis
class Inspect(object):
    """
    Inspect a local or remote dataset returning a printout similar to `ncdump`_.
    
    >>> from ocgis import Inspect
    ...
    >>> # Just do an dataset attribute dump.
    >>> ip = Inspect('/my/local/dataset')
    >>> print(ip)
    ...
    >>> # Get variable-specific info.
    >>> ip = Inspect('/my/local/dataset',variable='tas')
    >>> print(ip)
    
    :param uri: Absolute path to data's location.
    :type uri: str
    :param variable: Specific variable to inspect.
    :type variable: str
    :param interface_overload: Overloads for autodiscover.
    :type interface_overload: dict
    
    .. _ncdump: http://www.unidata.ucar.edu/software/netcdf/docs/netcdf/ncdump.html
    """
    
    def __init__(self,uri=None,variable=None,interface_overload={},request_dataset=None):
        self.request_dataset = request_dataset
        if self.request_dataset is None:
            self.uri = uri
            self.variable = variable
            self.alias = None
            self.did = None
            if self.variable is None:
                try:
                    self.ds = None
                    rootgrp = nc.Dataset(uri)
                    self.meta = NcMetadata(rootgrp)
                finally:
                    rootgrp.close()
            else:
                from ocgis.api.request.base import RequestDataset
                kwds = {'uri':uri,'variable':variable}
                kwds.update(interface_overload)
                rd = RequestDataset(**kwds)
                self.ds = rd.get()
                self.meta = self.ds.meta
        else:
            self.uri = self.request_dataset.uri
            self.variable = self.request_dataset.variable
            self.ds = self.request_dataset.get()
            self.meta = self.ds.meta
            self.alias = self.request_dataset.alias
            self.did = self.request_dataset.did
        
    def __repr__(self):
        msg = ''
        if self.variable is None:
            lines = self.get_report_no_variable()
        else:
            lines = self.get_report()
        for line in lines:
            msg += line + '\n'
        return(msg)
        
    @property
    def _t(self):
        return(self.ds.temporal)
    @property
    def _s(self):
        return(self.ds.spatial)
    @property
    def _l(self):
        return(self.ds.level)
        
    def get_temporal_report(self):
            
        try:
            if self._t.format_time:
                res = int(self._t.resolution)
                try:
                    start_date,end_date = self._t.extent_datetime
                ## the times may not be formattable
                except ValueError as e:
                    if e.message == 'year is out of range':
                        start_date,end_date = self._t.extent
                    else:
                        ocgis_lh(exc=e,logger='inspect')
            else:
                res = 'NA (non-formatted times requested)'
                start_date,end_date = self._t.extent
        ## raised if the temporal dimension has a single value. possible with
        ## snippet or a small dataset...
        except ResolutionError:
            res,start_date,end_date = ['NA (singleton)']*3
            
        n = len(self._t.value)
        calendar = self._t.calendar
        units = self._t.units
        
        lines = []
        lines.append('       Start Date = {0}'.format(start_date))
        lines.append('         End Date = {0}'.format(end_date))
        lines.append('         Calendar = {0}'.format(calendar))
        lines.append('            Units = {0}'.format(units))
        lines.append('Resolution (Days) = {0}'.format(res))
        lines.append('            Count = {0}'.format(n))
        
        ## append information on bounds
        if self._t.bounds is not None:
            has_bounds = True
        else:
            has_bounds = False
        lines.append('       Has Bounds = {0}'.format(has_bounds))
        
        return(lines)
    
    def get_spatial_report(self):
        res = self._s.grid.resolution
        extent = self._s.grid.extent

        itype = self._s.geom.get_highest_order_abstraction().__class__.__name__
        projection = self.ds.spatial.crs
        
        lines = []
        lines.append('Spatial Reference = {0}'.format(projection.__class__.__name__))
        lines.append('     Proj4 String = {0}'.format(projection.sr.ExportToProj4()))
        lines.append('           Extent = {0}'.format(extent))
        lines.append('   Interface Type = {0}'.format(itype))
        lines.append('       Resolution = {0}'.format(res))
        lines.append('            Count = {0}'.format(self._s.grid.uid.reshape(-1).shape[0]))
        
        return(lines)
    
    def get_level_report(self):
        if self._l is None:
            lines = ['No level dimension found.']
        else:
            lines = []
            lines.append('Level Variable = {0}'.format(self._l.name))
            lines.append('         Count = {0}'.format(self._l.value.shape[0]))
            
            ## append information on bounds
            if self._l.bounds is not None:
                has_bounds = True
            else:
                has_bounds = False
            lines.append('    Has Bounds = {0}'.format(has_bounds))
            
        return(lines)
    
    def get_dump_report(self):
        return(self.meta._get_lines_())
    
    def get_report_no_variable(self):
        lines = ['','URI = {0}'.format(self.uri)]
        lines.append('VARIABLE = {0}'.format(self.variable))
        lines.append('')
        lines += self.get_dump_report()
        return(lines)
    
    def get_report(self):
        mp = [
              {'=== Temporal =============':self.get_temporal_report},
              {'=== Spatial ==============':self.get_spatial_report},
              {'=== Level ================':self.get_level_report},
              {'=== Dump =================':self.get_dump_report}
              ]
        
        lines = ['','URI = {0}'.format(self.uri)]
        lines.append('VARIABLE = {0}'.format(self.variable))
        lines.append('ALIAS = {0}'.format(self.alias))
        lines.append('DID = {0}'.format(self.did))
        lines.append('')
        for dct in mp:
            for key,value in dct.iteritems():
                lines.append(key)
                lines.append('')
                for line in value():
                    lines.append(line)
            lines.append('')
        
        return(lines)
    
    def _as_dct_(self):
        ret = self.meta.copy()
        ## without a target variable, attempt to set start and end dates.
        if self.variable is None:
            ds = nc.Dataset(self.uri,'r')
            try:
                time = ds.variables['time']
                time_bounds = [time[0],time[-1]]
                time_bounds = nc.num2date(time_bounds,time.units,calendar=time.calendar)
                derived = {'Start Date':str(time_bounds[0]),'End Date':str(time_bounds[1])}
            except:
                warn('Time variable not found or improperly attributed. Setting "derived" key to None.')
                derived = None
            finally:
                ds.close()
        ## we can get derived values
        else:
            derived = OrderedDict()
            to_add = self.get_temporal_report() + self.get_spatial_report() + self.get_level_report()
            for row in to_add:
                try:
                    key,value = re.split(' = ',row,maxsplit=1)
                ## here to catch oddities of the returns
                except ValueError:
                    if row == 'No level dimension found.':
                        continue
                    else:
                        raise
                key = key.strip()
                derived.update({key:value})
        ret.update({'derived':derived})
        return(ret)
示例#6
0
文件: dataset.py 项目: imclab/ocgis
 def metadata(self):
     if self._metadata is None:
         self._metadata = NcMetadata(self._ds)
     return(self._metadata)
示例#7
0
 def test_ncmeta(self):
     ncm = NcMetadata(self.rootgrp)
     self.assertEqual(set(ncm.keys()),set(['dataset','variables','dimensions','file_format']))
示例#8
0
 def test_init(self):
     with nc_scope(self.rd.uri, 'r') as ds:
         ncm = NcMetadata(ds)
     self.assertEqual(set(ncm.keys()), set(['dataset', 'variables', 'dimensions', 'file_format']))
示例#9
0
 def test_ncmeta(self):
     ncm = NcMetadata(self.rootgrp)
     self.assertEqual(ncm.keys(), ['dataset', 'variables', 'dimensions'])
示例#10
0
 def test_ncmeta(self):
     ncm = NcMetadata(self.rootgrp)
     self.assertEqual(ncm.keys(),['dataset','variables','dimensions'])
示例#11
0
class Inspect(object):
    """
    Inspect a local or remote dataset returning a printout similar to `ncdump`_.
    
    >>> from ocgis import Inspect
    ...
    >>> # Just do an dataset attribute dump.
    >>> ip = Inspect('/my/local/dataset')
    >>> print(ip)
    ...
    >>> # Get variable-specific info.
    >>> ip = Inspect('/my/local/dataset',variable='tas')
    >>> print(ip)
    
    :param uri: Absolute path to data's location.
    :type uri: str
    :param variable: Specific variable to inspect.
    :type variable: str
    :param interface_overload: Overloads for autodiscover.
    :type interface_overload: dict
    
    .. _ncdump: http://www.unidata.ucar.edu/software/netcdf/docs/netcdf/ncdump.html
    """
    def __init__(self,
                 uri=None,
                 variable=None,
                 interface_overload={},
                 request_dataset=None):
        self.request_dataset = request_dataset
        if self.request_dataset is None:
            self.uri = uri
            self.variable = variable
            self.alias = None
            self.did = None
            if self.variable is None:
                try:
                    self.ds = None
                    rootgrp = nc.Dataset(uri)
                    self.meta = NcMetadata(rootgrp)
                finally:
                    rootgrp.close()
            else:
                from ocgis.api.request import RequestDataset
                kwds = {'uri': uri, 'variable': variable}
                kwds.update(interface_overload)
                rd = RequestDataset(**kwds)
                self.ds = NcDataset(request_dataset=rd)
                self.meta = self.ds.metadata
        else:
            self.uri = self.request_dataset.uri
            self.variable = self.request_dataset.variable
            self.ds = self.request_dataset.ds
            self.meta = self.request_dataset.ds.metadata
            self.alias = self.request_dataset.alias
            self.did = self.request_dataset.did

    def __repr__(self):
        msg = ''
        if self.variable is None:
            lines = self.get_report_no_variable()
        else:
            lines = self.get_report()
        for line in lines:
            msg += line + '\n'
        return (msg)

    @property
    def _t(self):
        return (self.ds.temporal)

    @property
    def _s(self):
        return (self.ds.spatial)

    @property
    def _l(self):
        return (self.ds.level)

    def get_temporal_report(self):
        ## format the time for the temporal report
        if self._t.format_time:
            start_date, end_date = self._t.get_datetime(
                [self._t.value.min(), self._t.value.max()])
        else:
            start_date, end_date = self._t.value.min(), self._t.value.max()

        try:
            if self._t.format_time:
                res = int(self._t.resolution)
            else:
                res = 'NA (non-formatted times requested)'
        ## raised if the temporal dimension has a single value. possible with
        ## snippet or a small dataset...
        except TemporalResolutionError:
            res = 'NA (singleton)'
        n = len(self._t.value)
        calendar = self._t.calendar
        units = self._t.units

        lines = []
        lines.append('       Start Date = {0}'.format(start_date))
        lines.append('         End Date = {0}'.format(end_date))
        lines.append('         Calendar = {0}'.format(calendar))
        lines.append('            Units = {0}'.format(units))
        lines.append('Resolution (Days) = {0}'.format(res))
        lines.append('            Count = {0}'.format(n))

        ## append information on bounds
        if self._t.bounds is not None:
            has_bounds = True
        else:
            has_bounds = False
        lines.append('       Has Bounds = {0}'.format(has_bounds))

        return (lines)

    def get_spatial_report(self):
        try:
            res = self._s.grid.resolution
        except NotImplementedError:
            if isinstance(self._s.grid, NcGridMatrixDimension):
                res = '<not implemented for grid matrices>'
            else:
                raise
        try:
            extent = self._s.grid.extent
        except NotImplementedError:
            if isinstance(self._s.grid, NcGridMatrixDimension):
                extent = '<not implemented for grid matrices>'
            else:
                raise
        itype = self._s.vector.__class__.__name__
        projection = self.ds.spatial.projection

        lines = []
        lines.append('Spatial Reference = {0}'.format(
            projection.__class__.__name__))
        lines.append('     Proj4 String = {0}'.format(
            projection.sr.ExportToProj4()))
        lines.append('           Extent = {0}'.format(extent))
        lines.append('   Interface Type = {0}'.format(itype))
        lines.append('       Resolution = {0}'.format(res))
        lines.append('            Count = {0}'.format(
            self._s.grid.uid.reshape(-1).shape[0]))

        return (lines)

    def get_level_report(self):
        if self._l is None:
            lines = ['No level dimension found.']
        else:
            lines = []
            lines.append('Level Variable = {0}'.format(self._l.name))
            lines.append('         Count = {0}'.format(self._l.value.shape[0]))

            ## append information on bounds
            if self._l.bounds is not None:
                has_bounds = True
            else:
                has_bounds = False
            lines.append('    Has Bounds = {0}'.format(has_bounds))

        return (lines)

    def get_dump_report(self):
        return (self.meta._get_lines_())

    def get_report_no_variable(self):
        lines = ['', 'URI = {0}'.format(self.uri)]
        lines.append('VARIABLE = {0}'.format(self.variable))
        lines.append('')
        lines += self.get_dump_report()
        return (lines)

    def get_report(self):
        mp = [{
            '=== Temporal =============': self.get_temporal_report
        }, {
            '=== Spatial ==============': self.get_spatial_report
        }, {
            '=== Level ================': self.get_level_report
        }, {
            '=== Dump =================': self.get_dump_report
        }]

        lines = ['', 'URI = {0}'.format(self.uri)]
        lines.append('VARIABLE = {0}'.format(self.variable))
        lines.append('ALIAS = {0}'.format(self.alias))
        lines.append('DID = {0}'.format(self.did))
        lines.append('')
        for dct in mp:
            for key, value in dct.iteritems():
                lines.append(key)
                lines.append('')
                for line in value():
                    lines.append(line)
            lines.append('')

        return (lines)

    def _as_dct_(self):
        ret = self.meta.copy()
        ## without a target variable, attempt to set start and end dates.
        if self.variable is None:
            ds = nc.Dataset(self.uri, 'r')
            try:
                time = ds.variables['time']
                time_bounds = [time[0], time[-1]]
                time_bounds = nc.num2date(time_bounds,
                                          time.units,
                                          calendar=time.calendar)
                derived = {
                    'Start Date': str(time_bounds[0]),
                    'End Date': str(time_bounds[1])
                }
            except:
                warn(
                    'Time variable not found or improperly attributed. Setting "derived" key to None.'
                )
                derived = None
            finally:
                ds.close()
        ## we can get derived values
        else:
            derived = OrderedDict()
            to_add = self.get_temporal_report() + self.get_spatial_report(
            ) + self.get_level_report()
            for row in to_add:
                try:
                    key, value = re.split(' = ', row, maxsplit=1)
                ## here to catch oddities of the returns
                except ValueError:
                    if row == 'No level dimension found.':
                        continue
                    else:
                        raise
                key = key.strip()
                derived.update({key: value})
        ret.update({'derived': derived})
        return (ret)