def decompressFileDefault(name, overwrite=False, outname=None):
"""
:type string: name - name of file to decompress
:type bool: overwrite - overwrite destination
:type string: outname - name for decompressed file, not required.
Default will be '.'.join([name, 'lz4'])
Generic decompress method for a file. Removes .lz4 to original file name
for output, unless outname is provided.
***WARNING*** Currently uses lz4f.compressFrame, which will read the entire
original file into memory, then pass to c-module for compression. Avoid
using this for large files until migrated to advCompress functions.
"""
if not outname:
print 'testing'
outname = name.replace('.lz4', '')
if outname == name:
print(''.join([
'File does not contain .lz4 extension. ',
'Please provide outname.'
]))
return
if os.path.exists(outname) and not overwrite:
print(''.join([
'Output file exists! Please authorize overwrite or',
' specify a different outfile name.'
]))
infile = Lz4File.open(name)
infile.decompress(outname)
def lz4open(cls, name=None, mode='r', fileobj=None):
if name and not fileobj:
fileobj=__builtin__.open(name, 'rb')
elif not name and not fileobj:
print('Unable to open without a name or fileobj')
return
if not name and hasattr(fileobj.name):
name = fileobj.name
lz4FileOut = Lz4File.open(fileObj=fileobj)
try:
t = cls(None, mode, lz4FileOut)
except:
lz4FileOut.close()
t._extfileobj = False
return t
def lz4open(cls, name, mode='r', fileobj=None, **kwargs):
try:
import lz4tools
Lz4File = lz4tools.Lz4File
except (ImportError, AttributeError):
raise CompressionError("Lz4file module is not available")
if name and fileobj is None:
try:
fileobj = Lz4File.open(name)
except IOError:
raise ReadError('Not a lz4 file')
elif not name and not fileobj:
print('Unable to open without a name or fileobj')
return
if not name and hasattr(fileobj, 'name'):
name = fileobj.name
try:
t = cls(None, mode, fileobj)
except:
fileobj.close()
t._extfileobj = False
return t
def lz4open(cls, name, mode='r', fileobj=None, **kwargs):
try:
import lz4tools
Lz4File = lz4tools.Lz4File
except (ImportError, AttributeError):
raise CompressionError("Lz4file module is not available")
if name and fileobj is None:
try:
fileobj = Lz4File.open(name)
except IOError:
raise ReadError('Not a lz4 file')
elif not name and not fileobj:
print('Unable to open without a name or fileobj')
return
if not name and hasattr(fileobj, 'name'):
name = fileobj.name
try:
t = cls(None, mode, fileobj)
except:
fileobj.close()
t._extfileobj = False
return t
def decompressFileDefault(name, overwrite=False, outname=None):
"""
:type string: name - name of file to decompress
:type bool: overwrite - overwrite destination
:type string: outname - name for decompressed file, not required.
Default will be '.'.join([name, 'lz4'])
Generic decompress method for a file. Removes .lz4 to original file name
for output, unless outname is provided.
***WARNING*** Currently uses lz4f.compressFrame, which will read the entire
original file into memory, then pass to c-module for compression. Avoid
using this for large files until migrated to advCompress functions.
"""
if not outname:
outname = name.replace('.lz4', '')
if outname == name:
print(''.join(['File does not contain .lz4 extension. ',
'Please provide outname.']))
return
if os.path.exists(outname) and not overwrite:
print(''.join(['Output file exists! Please authorize overwrite or',
' specify a different outfile name.']))
infile = Lz4File.open(name)
infile.decompress(outname)
def open(name=None, fileObj=None):
""" Alias for Lz4File.open() """
return Lz4File.open(name, fileObj)
def open(name=None, fileObj=None):
""" Alias for Lz4File.open() """
return Lz4File.open(name, fileObj)
