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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _from_any(cls, spec):
 """Generic creation method for all types accepted as ``spec``"""

        if isinstance(spec, str):
            spec = cls.from_file(spec)
        elif isinstance(spec, dict):
            spec = cls.from_dict(spec)
        elif not isinstance(spec, cls):
            raise context.TypeError("spec must be either an ApplicationSpec, "
                                    "path, or dict, got "
                                    "%s" % type(spec).__name__)
        return spec