64 lines
2.1 KiB
Python
64 lines
2.1 KiB
Python
import sys
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__exclude = set(('__builtins__', '__file__', '__name__'))
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def inject(module_name, new_globals, *additional_modules):
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## Put the specified modules in sys.modules for the duration of the import
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saved = {}
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for name, mod in additional_modules:
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saved[name] = sys.modules.get(name, None)
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sys.modules[name] = mod
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## Remove the old module from sys.modules and reimport it while the specified modules are in place
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old_module = sys.modules.pop(module_name, None)
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module = __import__(module_name, {}, {}, module_name.split('.')[:-1])
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if new_globals is not None:
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## Update the given globals dictionary with everything from this new module
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for name in dir(module):
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if name not in __exclude:
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new_globals[name] = getattr(module, name)
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## Keep a reference to the new module to prevent it from dying
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sys.modules['__patched_module_' + module_name] = module
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## Put the original module back
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if old_module is not None:
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sys.modules[module_name] = old_module
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else:
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del sys.modules[module_name]
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## Put all the saved modules back
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for name, mod in additional_modules:
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if saved[name] is not None:
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sys.modules[name] = saved[name]
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else:
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del sys.modules[name]
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return module
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def import_patched(module_name, *additional_modules, **kw_additional_modules):
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return inject(
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module_name,
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None,
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*additional_modules + tuple(kw_additional_modules.items()))
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def patch_function(func, *additional_modules):
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"""Huge hack here -- patches the specified modules for the
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duration of the function call."""
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def patched(*args, **kw):
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saved = {}
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for name, mod in additional_modules:
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saved[name] = sys.modules.get(name, None)
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sys.modules[name] = mod
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try:
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return func(*args, **kw)
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finally:
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## Put all the saved modules back
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for name, mod in additional_modules:
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if saved[name] is not None:
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sys.modules[name] = saved[name]
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return patched
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