Expect column entries to be strings that match a given regular expression. Valid matches can be found \
        anywhere in the string, for example "[at]+" will identify the following strings as expected: "cat", "hat", \
        "aa", "a", and "t", and the following strings as unexpected: "fish", "dog".

        expect_column_values_to_match_regex is a :func:`column_map_expectation <great_expectations.data_asset.dataset.Dataset.column_map_expectation>`.

        Args:
            column (str): \
                The column name.
            regex (str): \
                The regular expression the column entries should match.

        Keyword Args:
            mostly (None or a float between 0 and 1): \
                Return `"success": True` if at least mostly percent of values match the expectation. \
                For more detail, see :ref:`mostly`.

        Other Parameters:
            result_format (str or None): \
                Which output mode to use: `BOOLEAN_ONLY`, `BASIC`, `COMPLETE`, or `SUMMARY`.
                For more detail, see :ref:`result_format <result_format>`.
            include_config (boolean): \
                If True, then include the expectation config as part of the result object. \
                For more detail, see :ref:`include_config`.
            catch_exceptions (boolean or None): \
                If True, then catch exceptions and include them as part of the result object. \
                For more detail, see :ref:`catch_exceptions`.
            meta (dict or None): \
                A JSON-serializable dictionary (nesting allowed) that will be included in the output without modification. \
                For more detail, see :ref:`meta`.

        Returns:
            A JSON-serializable expectation result object.

            Exact fields vary depending on the values passed to :ref:`result_format <result_format>` and
            :ref:`include_config`, :ref:`catch_exceptions`, and :ref:`meta`.

        See Also:
            expect_column_values_to_not_match_regex
            expect_column_values_to_match_regex_list

def expect_column_values_to_match_regex(self,
                                            column,
                                            regex,
                                            mostly=None,
                                            result_format=None, include_config=False, catch_exceptions=None, meta=None
                                            ):
        """Expect column entries to be strings that match a given regular expression. Valid matches can be found \
        anywhere in the string, for example "[at]+" will identify the following strings as expected: "cat", "hat", \
        "aa", "a", and "t", and the following strings as unexpected: "fish", "dog".

        expect_column_values_to_match_regex is a :func:`column_map_expectation <great_expectations.data_asset.dataset.Dataset.column_map_expectation>`.

        Args:
            column (str): \
                The column name.
            regex (str): \
                The regular expression the column entries should match.

        Keyword Args:
            mostly (None or a float between 0 and 1): \
                Return `"success": True` if at least mostly percent of values match the expectation. \
                For more detail, see :ref:`mostly`.

        Other Parameters:
            result_format (str or None): \
                Which output mode to use: `BOOLEAN_ONLY`, `BASIC`, `COMPLETE`, or `SUMMARY`.
                For more detail, see :ref:`result_format <result_format>`.
            include_config (boolean): \
                If True, then include the expectation config as part of the result object. \
                For more detail, see :ref:`include_config`.
            catch_exceptions (boolean or None): \
                If True, then catch exceptions and include them as part of the result object. \
                For more detail, see :ref:`catch_exceptions`.
            meta (dict or None): \
                A JSON-serializable dictionary (nesting allowed) that will be included in the output without modification. \
                For more detail, see :ref:`meta`.

        Returns:
            A JSON-serializable expectation result object.

            Exact fields vary depending on the values passed to :ref:`result_format <result_format>` and
            :ref:`include_config`, :ref:`catch_exceptions`, and :ref:`meta`.

        See Also:
            expect_column_values_to_not_match_regex
            expect_column_values_to_match_regex_list
        """
        raise NotImplementedError