type t = [ `Format_parser | `Object ] Obj.tval of_pyobject : Py.Object.t -> tval to_pyobject : [> tag ] Obj.t -> Py.Object.tval create :
?aligned:bool ->
?byteorder:string ->
formats:[ `StringList of string list | `S of string ] ->
names:[ `List_tuple_of_str of Py.Object.t | `S of string ] ->
titles:Py.Object.t ->
unit ->
tClass 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``
Attributes ---------- dtype : dtype The converted data-type.
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'))
val to_string : t -> stringPrint the object to a human-readable representation.
val show : t -> stringPrint the object to a human-readable representation.
val pp : Format.formatter -> t -> unitPretty-print the object to a formatter.