Save several arrays into a single, compressed file in .npz format.
If keyword arguments are given, the names for variables assigned to the keywords are the keyword names (not the variable names in the caller). If arguments are passed in with no keywords, the corresponding variable names are arr_0, arr_1, etc.
file : str or file
args : Arguments
kwds : Keyword arguments
The .npz file format is a zipped archive of files named after the variables they contain. Each file contains one variable in .npy format. For a description of the .npy format, see format.
>>> from tempfile import TemporaryFile >>> outfile = TemporaryFile() >>> x = np.arange(10) >>> y = np.sin(x)
Using savez with *args, the arrays are saved with default names.
>>> np.savez(outfile, x, y) >>> outfile.seek(0) # only necessary in this example (with tempfile) >>> npz = np.load(outfile) >>> npz.files ['arr_1', 'arr_0'] >>> npz['arr_0'] array([0, 1, 2, 3, 4, 5, 6, 7, 8, 9])
Using savez with **kwds, the arrays are saved with the keyword names.
>>> outfile = TemporaryFile() >>> np.savez(outfile, x=x, y=y) >>> outfile.seek(0) >>> npz = np.load(outfile) >>> npz.files ['y', 'x'] >>> npz['x'] array([0, 1, 2, 3, 4, 5, 6, 7, 8, 9])