36 lines
1.1 KiB
Python
36 lines
1.1 KiB
Python
"""Miscellaneous utility functions."""
|
|
|
|
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()
|