/usr/share/pyshared/nibabel/fileholders.py is in python-nibabel 1.2.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 | # emacs: -*- mode: python-mode; py-indent-offset: 4; indent-tabs-mode: nil -*-
# vi: set ft=python sts=4 ts=4 sw=4 et:
### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ##
#
# See COPYING file distributed along with the NiBabel package for the
# copyright and license terms.
#
### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ##
''' Fileholder class '''
from copy import copy
from .volumeutils import allopen
class FileHolderError(Exception):
pass
class FileHolder(object):
''' class to contain filename, fileobj and file position
'''
def __init__(self,
filename=None,
fileobj=None,
pos=0):
''' Initialize FileHolder instance
Parameters
----------
filename : str, optional
filename. Default is None
fileobj : file-like object, optional
Should implement at least 'seek' (for the purposes for this
class). Default is None
pos : int, optional
position in filename or fileobject at which to start reading
or writing data; defaults to 0
'''
self.filename = filename
self.fileobj = fileobj
self.pos = pos
def get_prepare_fileobj(self, *args, **kwargs):
''' Return fileobj if present, or return fileobj from filename
Set position to that given in self.pos
Parameters
----------
*args : tuple
positional arguments to file open. Ignored if there is a
defined ``self.fileobj``. These might include the mode, such
as 'rb'
**kwargs : dict
named arguments to file open. Ignored if there is a
defined ``self.fileobj``
Returns
-------
fileobj : file-like object
object has position set (via ``fileobj.seek()``) to
``self.pos``
'''
if self.fileobj is not None:
obj = self.fileobj
obj.seek(self.pos)
elif self.filename is not None:
obj = allopen(self.filename, *args, **kwargs)
if self.pos != 0:
obj.seek(self.pos)
else:
raise FileHolderError('No filename or fileobj present')
return obj
def same_file_as(self, other):
""" Test if `self` refers to same files / fileobj as `other`
Parameters
----------
other : object
object with `filename` and `fileobj` attributes
Returns
-------
tf : bool
True if `other` has the same filename (or both have None) and the
same fileobj (or both have None
"""
return ((self.filename == other.filename) and
(self.fileobj == other.fileobj))
def copy_file_map(file_map):
''' Copy mapping of fileholders given by `file_map`
Parameters
----------
file_map : mapping
mapping of ``FileHolder`` instances
Returns
-------
fm_copy : dict
Copy of `file_map`, using shallow copy of ``FileHolder``\s
'''
fm_copy = {}
for key, fh in file_map.items():
fm_copy[key] = copy(fh)
return fm_copy
|