Testing¶

Assertion functions¶

`testing.assert_frame_equal`(left, right[, ...])	Check that left and right DataFrame are equal.
`testing.assert_series_equal`(left, right[, ...])	Check that left and right Series are equal.
`testing.assert_index_equal`(left, right[, ...])	Check that left and right Index are equal.
`testing.assert_extension_array_equal`(left, right)	Check that left and right ExtensionArrays are equal.

Exceptions and warnings¶

`errors.AbstractMethodError`(class_instance[, ...])	Raise this error instead of NotImplementedError for abstract methods while keeping compatibility with Python 2 and Python 3.
`errors.AccessorRegistrationWarning`	Warning for attribute conflicts in accessor registration.
`errors.DataError`	Exception raised when trying to perform a ohlc on a non-numnerical column.
`errors.DtypeWarning`	Warning raised when reading different dtypes in a column from a file.
`errors.DuplicateLabelError`	Error raised when an operation would introduce duplicate labels.
`errors.EmptyDataError`	Exception that is thrown in pd.read_csv (by both the C and Python engines) when empty data or header is encountered.
`errors.IndexingError`	Exception is raised when trying to index and there is a mismatch in dimensions.
`errors.InvalidIndexError`	Exception raised when attempting to use an invalid index key.
`errors.IntCastingNaNError`	Raised when attempting an astype operation on an array with NaN to an integer dtype.
`errors.MergeError`	Error raised when problems arise during merging due to problems with input data.
`errors.NullFrequencyError`	Error raised when a null freq attribute is used in an operation that needs a non-null frequency, particularly DatetimeIndex.shift, TimedeltaIndex.shift, PeriodIndex.shift.
`errors.NumbaUtilError`	Error raised for unsupported Numba engine routines.
`errors.NumExprClobberingError`	Exception is raised when trying to use a built-in numexpr name as a variable name in a method like query or eval.
`errors.OptionError`	Exception for pandas.options, backwards compatible with KeyError checks.
`errors.OutOfBoundsDatetime`	Raised when the datetime is outside the range that can be represented.
`errors.OutOfBoundsTimedelta`	Raised when encountering a timedelta value that cannot be represented as a timedelta64[ns].
`errors.ParserError`	Exception that is raised by an error encountered in parsing file contents.
`errors.ParserWarning`	Warning raised when reading a file that doesn't use the default 'c' parser.
`errors.PerformanceWarning`	Warning raised when there is a possible performance impact.
`errors.PyperclipException`	Exception is raised when trying to use methods like to_clipboard() and read_clipboard() on an unsupported OS/platform.
`errors.PyperclipWindowsException`(message)	Exception is raised when pandas is unable to get access to the clipboard handle due to some other window process is accessing it.
`errors.SettingWithCopyError`	Exception is raised when trying to set on a copied slice from a dataframe and the mode.chained_assignment is set to 'raise.' This can happen unintentionally when chained indexing.
`errors.SettingWithCopyWarning`	Warning is raised when trying to set on a copied slice from a dataframe and the mode.chained_assignment is set to 'warn.' 'Warn' is the default option.
`errors.SpecificationError`	Exception raised in two scenarios.
`errors.UndefinedVariableError`(name[, is_local])	Exception is raised when trying to use an undefined variable name in a method like query or eval.
`errors.UnsortedIndexError`	Error raised when attempting to get a slice of a MultiIndex, and the index has not been lexsorted.
`errors.UnsupportedFunctionCall`	Exception raised when attempting to call a numpy function on a pandas object, but that function is not supported by the object e.g.

Bug report function¶

show_versions([as_json])

Provide useful information, important for bug reports.

Test suite runner¶

test([extra_args])

Run the pandas test suite using pytest.

pandas.api.indexers.check_array_indexer

pandas.testing.assert_frame_equal