# Copyright (c) 2014, Vienna University of Technology (TU Wien), Department
# of Geodesy and Geoinformation (GEO).
# All rights reserved.
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# modification, are permitted provided that the following conditions are met:
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# Geodesy and Geoinformation nor the names of its contributors may be used to
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# Author: Thomas Mistelbauer Thomas.Mistelbauer@geo.tuwien.ac.at
# Creation date: 2014-10-02
import os
supported_formats = ['.nc', '.nc4',
'.h5',
'.tiff', '.tif',
'.png', '.jpg', '.jpeg', '.gif']
[docs]def check_supported(filename):
"""Checks if file is in supported format.
Parameters
----------
filename : str
Filename or filepath.
Returns
-------
bool
True if supported, False if not.
"""
return os.path.splitext(filename)[1].lower() in supported_formats
[docs]def select_file(filelist):
"""Selects a file out of a list of files, based on their extension.
Parameters
----------
filelist : list of str
List containing filepaths.
Returns
-------
filename : str
Filepath of selected file.
Raises
------
IOError :
If filelist contains no supported file format.
"""
extlist = []
for f in filelist:
fext = os.path.splitext(f)[1].lower()
if fext in supported_formats:
extlist.append(supported_formats.index(fext))
else:
extlist.append('X')
val, idx = min((val, idx) for (idx, val) in enumerate(extlist))
if val == 'X':
raise IOError("No valid file format found.")
else:
return filelist[idx]