types.py 文件源码

def __new__(cls, *args, **kwargs):
        options = kwargs.get('options', {})
        if cls in _SymbolCache:
            newobj = sympy.Symbol.__new__(cls, *args, **options)
            newobj._cached_init()
        else:
            name = kwargs.get('name')

            # Create the new Function object and invoke __init__
            newcls = cls._symbol_type(name)
            newobj = sympy.Symbol.__new__(newcls, name, *args, **options)
            newobj.__init__(*args, **kwargs)

            # Store new instance in symbol cache
            newcls._cache_put(newobj)
        return newobj