/usr/lib/python2.7/dist-packages/PyMca/QDataSource.py is in pymca 4.7.1+dfsg-2.
This file is owned by root:root, with mode 0o644.
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# Copyright (C) 2004-2013 European Synchrotron Radiation Facility
#
# This file is part of the PyMca X-ray Fluorescence Toolkit developed at
# the ESRF by the Software group.
#
# This toolkit is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the Free
# Software Foundation; either version 2 of the License, or (at your option)
# any later version.
#
# PyMca is distributed in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
# details.
#
# You should have received a copy of the GNU General Public License along with
# PyMca; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# PyMca follows the dual licensing model of Riverbank's PyQt and cannot be
# used as a free plugin for a non-free program.
#
# Please contact the ESRF industrial unit (industry@esrf.fr) if this license
# is a problem for you.
#############################################################################*/
"""
Generic access to data sources.
"""
import sys
import os
from PyMca import PyMcaQt as qt
QTVERSION = qt.qVersion()
from PyMca import SpecFileDataSource
from PyMca import EdfFileDataSource
from PyMca import QEdfFileWidget
from PyMca import QSpecFileWidget
if sys.platform == "win32":
source_types = { SpecFileDataSource.SOURCE_TYPE: SpecFileDataSource.SpecFileDataSource,
EdfFileDataSource.SOURCE_TYPE: EdfFileDataSource.EdfFileDataSource}
source_widgets = { SpecFileDataSource.SOURCE_TYPE: QSpecFileWidget.QSpecFileWidget,
EdfFileDataSource.SOURCE_TYPE: QEdfFileWidget.QEdfFileWidget}
sps = None
else:
from PyMca import QSpsDataSource
sps = QSpsDataSource.SpsDataSource.sps
from PyMca import QSpsWidget
source_types = { SpecFileDataSource.SOURCE_TYPE: SpecFileDataSource.SpecFileDataSource,
EdfFileDataSource.SOURCE_TYPE: EdfFileDataSource.EdfFileDataSource,
QSpsDataSource.SOURCE_TYPE: QSpsDataSource.QSpsDataSource}
source_widgets = { SpecFileDataSource.SOURCE_TYPE: QSpecFileWidget.QSpecFileWidget,
EdfFileDataSource.SOURCE_TYPE: QEdfFileWidget.QEdfFileWidget,
QSpsDataSource.SOURCE_TYPE: QSpsWidget.QSpsWidget}
NEXUS = True
try:
from PyMca import NexusDataSource
from PyMca import PyMcaNexusWidget
import h5py
except:
# HDF5 file format support is not mandatory
NEXUS = False
if NEXUS:
source_types[NexusDataSource.SOURCE_TYPE] = NexusDataSource.NexusDataSource
source_widgets[NexusDataSource.SOURCE_TYPE] = PyMcaNexusWidget.PyMcaNexusWidget
def getSourceType(sourceName0):
if type(sourceName0) == type([]):
sourceName = sourceName0[0]
else:
sourceName = sourceName0
if sps is not None:
if sourceName in sps.getspeclist():
return QSpsDataSource.SOURCE_TYPE
if not os.path.exists(sourceName):
if ('%' in sourceName):
try:
f = h5py.File(sourceName, 'r', driver='family')
f.close()
f = None
return NexusDataSource.SOURCE_TYPE
except:
pass
if os.path.exists(sourceName):
f = open(sourceName, 'rb')
if sys.version < '3.0':
line = f.readline()
if not len(line.replace("\n","")):
line = f.readline()
else:
tiff = False
try:
twoChars = f.read(2)
if twoChars in [eval("b'II'"), eval("b'MM'")]:
f.close()
return EdfFileDataSource.SOURCE_TYPE
except:
pass
f.seek(0)
try:
line = str(f.readline().decode())
if not len(line.replace("\n","")):
line = str(f.readline().decode())
except UnicodeDecodeError:
line = str(f.readline().decode("latin-1"))
if not len(line.replace("\n","")):
line = str(f.readline().decode("latin-1"))
f.close()
if sourceName.lower().endswith('.cbf'):
#pilatus CBF
mccd = True
elif len(line) < 2:
mccd = False
elif line[0:2] in ["II","MM"]:
#this also accounts for TIFF
mccd = True
elif sourceName.lower().endswith('.spe') and\
(line[0:1] not in ['$', '#']):
#Roper images
mccd = True
else:
mccd = False
if (line.startswith("{")) or mccd:
return EdfFileDataSource.SOURCE_TYPE
elif sourceName.lower().endswith('edf.gz') or\
sourceName.lower().endswith('ccd.gz') or\
sourceName.lower().endswith('raw.gz') or\
sourceName.lower().endswith('edf.bz2') or\
sourceName.lower().endswith('ccd.bz2') or\
sourceName.lower().endswith('raw.bz2'):
return EdfFileDataSource.SOURCE_TYPE
else:
if NEXUS:
ishdf5 = False
try:
ishdf5 = h5py.is_hdf5(sourceName)
except TypeError:
if sys.version > '2.9':
if sourceName.endswith('.h5') or\
sourceName.endswith('.hdf') or\
sourceName.endswith('.nxs'):
ishdf5 = True
if ishdf5:
return NexusDataSource.SOURCE_TYPE
try:
f = h5py.File(sourceName, 'r')
f.close()
f = None
return NexusDataSource.SOURCE_TYPE
except:
pass
return SpecFileDataSource.SOURCE_TYPE
else:
return QSpsDataSource.SOURCE_TYPE
def QDataSource(name=None, source_type=None):
if name is None:
raise ValueError("Invalid Source Name")
if source_type is None:
source_type = getSourceType(name)
try:
sourceClass = source_types[source_type]
except KeyError:
#ERROR invalid source type
raise TypeError("Invalid Source Type, source type should be one of %s" % source_types.keys())
return sourceClass(name)
if __name__ == "__main__":
try:
sourcename=sys.argv[1]
key =sys.argv[2]
except:
print("Usage: QDataSource <sourcename> <key>")
sys.exit()
#one can use this:
#obj = EdfFileDataSource(sourcename)
#or this:
obj = QDataSource(sourcename)
#data = obj.getData(key,selection={'pos':(10,10),'size':(40,40)})
#data = obj.getData(key,selection={'pos':None,'size':None})
data = obj.getDataObject(key)
print("info = ",data.info)
print("data shape = ",data.data.shape)
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