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# numpy.format_parser

class `numpy.``format_parser`(formats, names, titles, aligned=False, byteorder=None)

  Class to convert formats, names, titles description to a dtype.

  After constructing the format_parser object, the dtype attribute is the converted data-type: `dtype = format_parser(formats, names, titles).dtype`

  Parameters : | formats : str or list of str The format description, either specified as a string with comma-separated format descriptions in the form `'f8, i4, a5'`, or a list of format description strings in the form `['f8', 'i4', 'a5']`. names : str or list/tuple of str The field names, either specified as a comma-separated string in the form `'col1, col2, col3'`, or as a list or tuple of strings in the form `['col1', 'col2', 'col3']`. An empty list can be used, in that case default field names (‘f0’, ‘f1’, ...) are used. titles : sequence Sequence of title strings. An empty list can be used to leave titles out. aligned : bool, optional If True, align the fields by padding as the C-compiler would. Default is False. byteorder : str, optional If specified, all the fields will be changed to the provided byte-order. Otherwise, the default byte-order is used. For all available string specifiers, see `dtype.newbyteorder`.

  See also

  `dtype`, `typename`, `sctype2char`

  Examples

      >>> np.format_parser(['f8', 'i4', 'a5'], ['col1', 'col2', 'col3'],
      ...                  ['T1', 'T2', 'T3']).dtype
      dtype([(('T1', 'col1'), '<f8'), (('T2', 'col2'), '<i4'),
             (('T3', 'col3'), '|S5')])

  names and/or titles can be empty lists. If titles is an empty list, titles will simply not appear. If names is empty, default field names will be used.

      >>> np.format_parser(['f8', 'i4', 'a5'], ['col1', 'col2', 'col3'],
      ...                  []).dtype
      dtype([('col1', '<f8'), ('col2', '<i4'), ('col3', '|S5')])
      >>> np.format_parser(['f8', 'i4', 'a5'], [], []).dtype
      dtype([('f0', '<f8'), ('f1', '<i4'), ('f2', '|S5')])

  Attributes

  dtype | (dtype) The converted data-type.