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from sympy.external import import_module
matchpy = import_module("matchpy")
from sympy.utilities.decorator import doctest_depends_on
if matchpy:
from matchpy import Wildcard
else:
class Wildcard:
def __init__(self, min_length, fixed_size, variable_name, optional):
pass
from sympy import Symbol
@doctest_depends_on(modules=('matchpy',))
class matchpyWC(Wildcard, Symbol):
def __init__(self, min_length, fixed_size, variable_name=None, optional=None, **assumptions):
Wildcard.__init__(self, min_length, fixed_size, str(variable_name), optional)
def __new__(cls, min_length, fixed_size, variable_name=None, optional=None, **assumptions):
cls._sanitize(assumptions, cls)
return matchpyWC.__xnew__(cls, min_length, fixed_size, variable_name, optional, **assumptions)
def __getnewargs__(self):
return (self.min_count, self.fixed_size, self.variable_name, self.optional)
@staticmethod
def __xnew__(cls, min_length, fixed_size, variable_name=None, optional=None, **assumptions):
obj = Symbol.__xnew__(cls, variable_name, **assumptions)
return obj
def _hashable_content(self):
if self.optional:
return super()._hashable_content() + (self.min_count, self.fixed_size, self.variable_name, self.optional)
else:
return super()._hashable_content() + (self.min_count, self.fixed_size, self.variable_name)
@doctest_depends_on(modules=('matchpy',))
def WC(variable_name=None, optional=None, **assumptions):
return matchpyWC(1, True, variable_name, optional)
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