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import sys
deprecated_aliases = {}
def deprecated_alias(old_name):
def wrap(f):
def old_f(*args, **kwargs):
ret = f(*args, **kwargs)
print("{} is deprecated, use {} instead.".format(old_name, f.__name__), file=sys.stderr)
return ret
old_f.__name__ = old_name
deprecated_aliases[old_name] = f.__name__
setattr(sys.modules[f.__module__], old_name, old_f)
return f
return wrap
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