Unidata/MetPy

# Copyright (c) 2019 MetPy Developers.
# Distributed under the terms of the BSD 3-Clause License.
# SPDX-License-Identifier: BSD-3-Clause
"""Provide accessors to enhance interoperability between Pandas and MetPy."""
import functools

import pandas as pd

__all__ = []


def preprocess_pandas(func):
    """Decorate a function to convert all data series arguments to `np.ndarray`."""
    @functools.wraps(func)
    def wrapper(*args, **kwargs):
        # not using hasattr(a, values) because it picks up dict.values()
        # and this is more explicitly handling pandas
        args = tuple(a.values if isinstance(a, pd.Series) else a for a in args)
        kwargs = {name: (v.values if isinstance(v, pd.Series) else v)
                  for name, v in kwargs.items()}
        return func(*args, **kwargs)
    return wrapper