def test_guess_datetime_format_no_padding(string, fmt):
# see gh-11142
result = parsing.guess_datetime_format(string)
assert result == fmt
def _guess_datetime_format_for_array(arr, **kwargs):
# Try to guess the format based on the first non-NaN element
non_nan_elements = notna(arr).nonzero()[0]
if len(non_nan_elements):
return guess_datetime_format(arr[non_nan_elements[0]], **kwargs)
def test_guess_datetime_format_invalid_inputs(invalid_dt):
# A datetime string must include a year, month and a day for it to be
# guessable, in addition to being a string that looks like a datetime.
assert parsing.guess_datetime_format(invalid_dt) is None
def test_guess_datetime_format_with_locale_specific_formats(string, fmt):
result = parsing.guess_datetime_format(string)
assert result == fmt
def test_guess_datetime_format_with_dayfirst(dayfirst, expected):
ambiguous_string = "01/01/2011"
result = parsing.guess_datetime_format(ambiguous_string, dayfirst=dayfirst)
assert result == expected
def test_guess_datetime_format_with_parseable_formats(string, fmt):
result = parsing.guess_datetime_format(string)
assert result == fmt
def _guess_datetime_format_for_array(arr, dayfirst: bool | None = False):
# Try to guess the format based on the first non-NaN element
non_nan_elements = notna(arr).nonzero()[0]
if len(non_nan_elements):
return guess_datetime_format(arr[non_nan_elements[0]], dayfirst=dayfirst)
