Code import
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Jan Groß
151
venv/lib/python2.7/site-packages/werkzeug/__init__.py
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151
venv/lib/python2.7/site-packages/werkzeug/__init__.py
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# -*- coding: utf-8 -*-
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"""
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werkzeug
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~~~~~~~~
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Werkzeug is the Swiss Army knife of Python web development.
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It provides useful classes and functions for any WSGI application to make
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the life of a python web developer much easier. All of the provided
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classes are independent from each other so you can mix it with any other
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library.
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:copyright: (c) 2014 by the Werkzeug Team, see AUTHORS for more details.
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:license: BSD, see LICENSE for more details.
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"""
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from types import ModuleType
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import sys
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from werkzeug._compat import iteritems
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__version__ = '0.12.2'
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# This import magic raises concerns quite often which is why the implementation
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# and motivation is explained here in detail now.
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#
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# The majority of the functions and classes provided by Werkzeug work on the
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# HTTP and WSGI layer. There is no useful grouping for those which is why
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# they are all importable from "werkzeug" instead of the modules where they are
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# implemented. The downside of that is, that now everything would be loaded at
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# once, even if unused.
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#
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# The implementation of a lazy-loading module in this file replaces the
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# werkzeug package when imported from within. Attribute access to the werkzeug
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# module will then lazily import from the modules that implement the objects.
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# import mapping to objects in other modules
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all_by_module = {
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'werkzeug.debug': ['DebuggedApplication'],
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'werkzeug.local': ['Local', 'LocalManager', 'LocalProxy', 'LocalStack',
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'release_local'],
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'werkzeug.serving': ['run_simple'],
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'werkzeug.test': ['Client', 'EnvironBuilder', 'create_environ',
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'run_wsgi_app'],
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'werkzeug.testapp': ['test_app'],
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'werkzeug.exceptions': ['abort', 'Aborter'],
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'werkzeug.urls': ['url_decode', 'url_encode', 'url_quote',
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'url_quote_plus', 'url_unquote', 'url_unquote_plus',
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'url_fix', 'Href', 'iri_to_uri', 'uri_to_iri'],
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'werkzeug.formparser': ['parse_form_data'],
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'werkzeug.utils': ['escape', 'environ_property', 'append_slash_redirect',
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'redirect', 'cached_property', 'import_string',
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'dump_cookie', 'parse_cookie', 'unescape',
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'format_string', 'find_modules', 'header_property',
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'html', 'xhtml', 'HTMLBuilder', 'validate_arguments',
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'ArgumentValidationError', 'bind_arguments',
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'secure_filename'],
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'werkzeug.wsgi': ['get_current_url', 'get_host', 'pop_path_info',
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'peek_path_info', 'SharedDataMiddleware',
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'DispatcherMiddleware', 'ClosingIterator', 'FileWrapper',
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'make_line_iter', 'LimitedStream', 'responder',
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'wrap_file', 'extract_path_info'],
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'werkzeug.datastructures': ['MultiDict', 'CombinedMultiDict', 'Headers',
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'EnvironHeaders', 'ImmutableList',
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'ImmutableDict', 'ImmutableMultiDict',
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'TypeConversionDict',
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'ImmutableTypeConversionDict', 'Accept',
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'MIMEAccept', 'CharsetAccept',
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'LanguageAccept', 'RequestCacheControl',
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'ResponseCacheControl', 'ETags', 'HeaderSet',
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'WWWAuthenticate', 'Authorization',
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'FileMultiDict', 'CallbackDict', 'FileStorage',
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'OrderedMultiDict', 'ImmutableOrderedMultiDict'
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],
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'werkzeug.useragents': ['UserAgent'],
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'werkzeug.http': ['parse_etags', 'parse_date', 'http_date', 'cookie_date',
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'parse_cache_control_header', 'is_resource_modified',
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'parse_accept_header', 'parse_set_header', 'quote_etag',
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'unquote_etag', 'generate_etag', 'dump_header',
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'parse_list_header', 'parse_dict_header',
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'parse_authorization_header',
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'parse_www_authenticate_header', 'remove_entity_headers',
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'is_entity_header', 'remove_hop_by_hop_headers',
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'parse_options_header', 'dump_options_header',
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'is_hop_by_hop_header', 'unquote_header_value',
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'quote_header_value', 'HTTP_STATUS_CODES'],
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'werkzeug.wrappers': ['BaseResponse', 'BaseRequest', 'Request', 'Response',
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'AcceptMixin', 'ETagRequestMixin',
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'ETagResponseMixin', 'ResponseStreamMixin',
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'CommonResponseDescriptorsMixin', 'UserAgentMixin',
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'AuthorizationMixin', 'WWWAuthenticateMixin',
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'CommonRequestDescriptorsMixin'],
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'werkzeug.security': ['generate_password_hash', 'check_password_hash'],
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# the undocumented easteregg ;-)
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'werkzeug._internal': ['_easteregg']
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}
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# modules that should be imported when accessed as attributes of werkzeug
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attribute_modules = frozenset(['exceptions', 'routing', 'script'])
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object_origins = {}
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for module, items in iteritems(all_by_module):
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for item in items:
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object_origins[item] = module
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class module(ModuleType):
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"""Automatically import objects from the modules."""
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def __getattr__(self, name):
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if name in object_origins:
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module = __import__(object_origins[name], None, None, [name])
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for extra_name in all_by_module[module.__name__]:
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setattr(self, extra_name, getattr(module, extra_name))
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return getattr(module, name)
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elif name in attribute_modules:
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__import__('werkzeug.' + name)
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return ModuleType.__getattribute__(self, name)
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def __dir__(self):
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"""Just show what we want to show."""
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result = list(new_module.__all__)
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result.extend(('__file__', '__path__', '__doc__', '__all__',
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'__docformat__', '__name__', '__path__',
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'__package__', '__version__'))
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return result
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# keep a reference to this module so that it's not garbage collected
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old_module = sys.modules['werkzeug']
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# setup the new module and patch it into the dict of loaded modules
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new_module = sys.modules['werkzeug'] = module('werkzeug')
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new_module.__dict__.update({
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'__file__': __file__,
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'__package__': 'werkzeug',
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'__path__': __path__,
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'__doc__': __doc__,
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'__version__': __version__,
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'__all__': tuple(object_origins) + tuple(attribute_modules),
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'__docformat__': 'restructuredtext en'
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})
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# Due to bootstrapping issues we need to import exceptions here.
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# Don't ask :-(
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__import__('werkzeug.exceptions')
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