NumPy
ufunc
numpy.exceptions
numpy.fft
numpy.linalg
numpy.random
numpy.testing
numpy.typing
numpy.distutils
lib.npyio.NpzFile.keys
method
D.keys() returns a set-like object providing a view on the keys
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numpy.lib.npyio.NpzFile.items
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numpy.lib.npyio.NpzFile.values