reader.py 文件源码

def isnull(value):
        """
        Return true if values is NaN or None.

        >>> import numpy as np
        >>> ReadPandas.isnull(np.NaN)
        True

        >>> ReadPandas.isnull(None)
        True

        >>> ReadPandas.isnull(0)
        False

        :param value: Value to test
        :return: Return true for NaN or None values.
        :rtype: bool
        """
        return pd.isnull(value)