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