# flake8: noqa

"""
Expose public exceptions & warnings
"""

from pandas._libs.tslib import OutOfBoundsDatetime


class PerformanceWarning(Warning):
    """
    Warning raised when there is a possible
    performance impact.
    """

class UnsupportedFunctionCall(ValueError):
    """
    Exception raised when attempting to call a numpy function
    on a pandas object, but that function is not supported by
    the object e.g. ``np.cumsum(groupby_object)``.
    """

class UnsortedIndexError(KeyError):
    """
    Error raised when attempting to get a slice of a MultiIndex,
    and the index has not been lexsorted. Subclass of `KeyError`.

    .. versionadded:: 0.20.0

    """


class ParserError(ValueError):
    """
    Exception that is raised by an error encountered in `pd.read_csv`.
    """


class DtypeWarning(Warning):
    """
    Warning that is raised for a dtype incompatiblity. This
    can happen whenever `pd.read_csv` encounters non-
    uniform dtypes in a column(s) of a given CSV file.
    """


class EmptyDataError(ValueError):
    """
    Exception that is thrown in `pd.read_csv` (by both the C and
    Python engines) when empty data or header is encountered.
    """


class ParserWarning(Warning):
    """
    Warning that is raised in `pd.read_csv` whenever it is necessary
    to change parsers (generally from 'c' to 'python') contrary to the
    one specified by the user due to lack of support or functionality for
    parsing particular attributes of a CSV file with the requsted engine.
    """


class MergeError(ValueError):
    """
    Error raised when problems arise during merging due to problems
    with input data. Subclass of `ValueError`.
    """