Python doctest 模块，REPORT_CDIFF 实例源码

def setUpClass(cls):
        import pdb
        # Workaround for the issue addressed by this (unmerged) PR to pdbpp:
        # https://bitbucket.org/antocuni/pdb/pull-request/40/fix-ensure_file_can_write_unicode/diff  # noqa
        if '_pdbpp_path_hack' in pdb.__file__:
            cls._skip = True
        else:
            cls._skip = False
        cls.flags = doctest.REPORT_CDIFF | doctest.IGNORE_EXCEPTION_DETAIL

def _get_report_choice(key):
    """
    This function returns the actual `doctest` module flag value, we want to do it as late as possible to avoid
    importing `doctest` and all its dependencies when parsing options, as it adds overhead and breaks tests.
    """
    import doctest

    return {
        DOCTEST_REPORT_CHOICE_UDIFF: doctest.REPORT_UDIFF,
        DOCTEST_REPORT_CHOICE_CDIFF: doctest.REPORT_CDIFF,
        DOCTEST_REPORT_CHOICE_NDIFF: doctest.REPORT_NDIFF,
        DOCTEST_REPORT_CHOICE_ONLY_FIRST_FAILURE: doctest.REPORT_ONLY_FIRST_FAILURE,
        DOCTEST_REPORT_CHOICE_NONE: 0,
    }[key]

def _get_report_choice(key):
    """
    This function returns the actual `doctest` module flag value, we want to do it as late as possible to avoid
    importing `doctest` and all its dependencies when parsing options, as it adds overhead and breaks tests.
    """
    import doctest

    return {
        DOCTEST_REPORT_CHOICE_UDIFF: doctest.REPORT_UDIFF,
        DOCTEST_REPORT_CHOICE_CDIFF: doctest.REPORT_CDIFF,
        DOCTEST_REPORT_CHOICE_NDIFF: doctest.REPORT_NDIFF,
        DOCTEST_REPORT_CHOICE_ONLY_FIRST_FAILURE: doctest.REPORT_ONLY_FIRST_FAILURE,
        DOCTEST_REPORT_CHOICE_NONE: 0,
    }[key]

def _get_report_choice(key):
    """
    This function returns the actual `doctest` module flag value, we want to do it as late as possible to avoid
    importing `doctest` and all its dependencies when parsing options, as it adds overhead and breaks tests.
    """
    import doctest

    return {
        DOCTEST_REPORT_CHOICE_UDIFF: doctest.REPORT_UDIFF,
        DOCTEST_REPORT_CHOICE_CDIFF: doctest.REPORT_CDIFF,
        DOCTEST_REPORT_CHOICE_NDIFF: doctest.REPORT_NDIFF,
        DOCTEST_REPORT_CHOICE_ONLY_FIRST_FAILURE: doctest.REPORT_ONLY_FIRST_FAILURE,
        DOCTEST_REPORT_CHOICE_NONE: 0,
    }[key]

def _get_report_choice(key):
    """
    This function returns the actual `doctest` module flag value, we want to do it as late as possible to avoid
    importing `doctest` and all its dependencies when parsing options, as it adds overhead and breaks tests.
    """
    import doctest

    return {
        DOCTEST_REPORT_CHOICE_UDIFF: doctest.REPORT_UDIFF,
        DOCTEST_REPORT_CHOICE_CDIFF: doctest.REPORT_CDIFF,
        DOCTEST_REPORT_CHOICE_NDIFF: doctest.REPORT_NDIFF,
        DOCTEST_REPORT_CHOICE_ONLY_FIRST_FAILURE: doctest.REPORT_ONLY_FIRST_FAILURE,
        DOCTEST_REPORT_CHOICE_NONE: 0,
    }[key]