def frompng(path, ext='png', start=None, stop=None, recursive=False, npartitions=None, labels=None, engine=None, credentials=None):
    """
    Load images from PNG files.

    Parameters
    ----------
    path : str
        Path to data files or directory, specified as either a local filesystem path
        or in a URI-like format, including scheme. May include a single '*' wildcard character.

    ext : string, optional, default = 'tif'
        Extension required on data files to be loaded.

    start, stop : nonnegative int, optional, default = None
        Indices of the first and last-plus-one file to load, relative to the sorted
        filenames matching `path` and `ext`. Interpreted using python slice indexing conventions.

    recursive : boolean, optional, default = False
        If true, will recursively descend directories from path, loading all files
        with an extension matching 'ext'.

    npartitions : int, optional, default = None
        Number of partitions for computational engine,
        if None will use default for engine.

    labels : array, optional, default = None
        Labels for records. If provided, should be one-dimensional.
    """
    from scipy.misc import imread

    def getarray(idx_buffer_filename):
        idx, buf, _ = idx_buffer_filename
        fbuf = BytesIO(buf)
        yield (idx,), imread(fbuf)

    return frompath(path, accessor=getarray, ext=ext, start=start,
                    stop=stop, recursive=recursive, npartitions=npartitions,
                    labels=labels, engine=engine, credentials=credentials)
Load images from PNG files.

    Parameters
    ----------
    path : str
        Path to data files or directory, specified as either a local filesystem path
        or in a URI-like format, including scheme. May include a single '*' wildcard character.

    ext : string, optional, default = 'tif'
        Extension required on data files to be loaded.

    start, stop : nonnegative int, optional, default = None
        Indices of the first and last-plus-one file to load, relative to the sorted
        filenames matching `path` and `ext`. Interpreted using python slice indexing conventions.

    recursive : boolean, optional, default = False
        If true, will recursively descend directories from path, loading all files
        with an extension matching 'ext'.

    npartitions : int, optional, default = None
        Number of partitions for computational engine,
        if None will use default for engine.

    labels : array, optional, default = None
        Labels for records. If provided, should be one-dimensional.