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follow Python conventions for boolean values...
follow Python conventions for boolean values True and False might be singletons and the "default" values for "boolean" expressions, but "all" values in Python has a boolean value and should be evaluated as such. Checking with 'is True' and 'is False' is thus confusing, error prone and unnessarily complex. If we anywhere rely and nullable boolean fields from the database layer and don't want the null value to be treated as False then we should check explicitly for null with 'is None'.
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archivers.py
67 lines | 1.2 KiB | text/x-python | PythonLexer
/ rhodecode / lib / vcs / utils / archivers.py
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# -*- coding: utf-8 -*-
"""
vcs.utils.archivers
~~~~~~~~~~~~~~~~~~~
set of archiver functions for creating archives from repository content
:created_on: Jan 21, 2011
:copyright: (c) 2010-2011 by Marcin Kuzminski, Lukasz Balcerzak.
"""
class BaseArchiver(object):
def __init__(self):
self.archive_file = self._get_archive_file()
def addfile(self):
"""
Adds a file to archive container
"""
pass
def close(self):
"""
Closes and finalizes operation of archive container object
"""
self.archive_file.close()
def _get_archive_file(self):
"""
Returns container for specific archive
"""
raise NotImplementedError()
class TarArchiver(BaseArchiver):
pass
class Tbz2Archiver(BaseArchiver):
pass
class TgzArchiver(BaseArchiver):
pass
class ZipArchiver(BaseArchiver):
pass
def get_archiver(self, kind):
"""
Returns instance of archiver class specific to given kind
:param kind: archive kind
"""
archivers = {
'tar': TarArchiver,
'tbz2': Tbz2Archiver,
'tgz': TgzArchiver,
'zip': ZipArchiver,
}
return archivers[kind]()