ak.all
------

Defined in `awkward.operations.reducers <https://github.com/scikit-hep/awkward-1.0/blob/80bbef0738a6b7928333d7c705ee1b359991de5b/src/awkward/operations/reducers.py>`__ on `line 451 <https://github.com/scikit-hep/awkward-1.0/blob/80bbef0738a6b7928333d7c705ee1b359991de5b/src/awkward/operations/reducers.py#L451>`__.

.. py:function:: ak.all(array, axis=None, keepdims=False, mask_identity=False)


    :param array: Data to combine with "logical and."
    :param axis: If None, combine all values from the array into
             a single scalar result; if an int, group by that axis: ``0`` is the
             outermost, ``1`` is the first level of nested lists, etc., and
             negative ``axis`` counts from the innermost: ``-1`` is the innermost,
             ``-2`` is the next level up, etc.
    :type axis: None or int
    :param keepdims: If False, this reducer decreases the number of
                 dimensions by 1; if True, the reduced values are wrapped in a new
                 length-1 dimension so that the result of this operation may be
                 broadcasted with the original array.
    :type keepdims: bool
    :param mask_identity: If True, reducing over empty lists results in
                      None (an option type); otherwise, reducing over empty lists
                      results in the operation's identity.
    :type mask_identity: bool

Returns True in each group of elements from ``array`` (many types supported,
including all Awkward Arrays and Records) if all values are True; False
otherwise. Thus, it represents reduction over the "logical and" operation,
whose identity is True (i.e. asking if all the values are True in an
empty list results in True). This operation is the same as NumPy's
`all <https://docs.scipy.org/doc/numpy/reference/generated/numpy.all.html>`__
if all lists at a given dimension have the same length and no None values,
but it generalizes to cases where they do not.

See :py:obj:`ak.sum` for a more complete description of nested list and missing
value (None) handling in reducers.

