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47 lines
1.3 KiB
47 lines
1.3 KiB
"""Miscellaneous utility functions."""
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class ObjectDict(dict):
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"""Makes a dictionary behave like an object."""
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def __getattr__(self, name):
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try:
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return self[name]
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except KeyError:
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raise AttributeError(name)
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def __setattr__(self, name, value):
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self[name] = value
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def import_object(name):
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"""Imports an object by name.
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import_object('x.y.z') is equivalent to 'from x.y import z'.
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>>> import tornado.escape
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>>> import_object('tornado.escape') is tornado.escape
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True
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>>> import_object('tornado.escape.utf8') is tornado.escape.utf8
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True
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"""
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parts = name.split('.')
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obj = __import__('.'.join(parts[:-1]), None, None, [parts[-1]], 0)
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return getattr(obj, parts[-1])
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# Fake byte literal support: In python 2.6+, you can say b"foo" to get
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# a byte literal (str in 2.x, bytes in 3.x). There's no way to do this
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# in a way that supports 2.5, though, so we need a function wrapper
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# to convert our string literals. b() should only be applied to literal
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# latin1 strings. Once we drop support for 2.5, we can remove this function
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# and just use byte literals.
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if str is unicode:
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def b(s):
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return s.encode('latin1')
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bytes_type = bytes
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else:
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def b(s):
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return s
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bytes_type = str
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def doctests():
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import doctest
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return doctest.DocTestSuite()
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