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# Lib module (`numpy.lib`)

## Functions & other objects

`add_docstring`(obj, docstring) | Add a docstring to a built-in obj if possible.
`add_newdoc`(place, obj, doc[, warn_on_python]) | Add documentation to an existing object, typically one defined in C
`Arrayterator`(var[, buf_size]) | Buffered iterator for big arrays.
`NumpyVersion`(vstring) | Parse and compare numpy version strings.

## Submodules

`array_utils` | Miscellaneous utils.
`format` | Binary serialization
`introspect` | Introspection helper functions.
`mixins` | Mixin classes for custom array types that don't inherit from ndarray.
`npyio` | IO related functions.
`scimath` | Wrapper functions to more user-friendly calling of certain math functions whose output data-type is different than the input data-type in certain domains of the input.
`stride_tricks` | Utilities that manipulate strides to achieve desirable effects.