The savez() method is used to save multiple arrays into a single file in uncompressed .npz format. It takes arrays as keyword arguments to save them into the specified file.
*args, the savez() method will save arrays to the argument file after the arr_0, arr_1, and so on.**kwds, then savez() will save arrays to the corresponding file as defined array names.numpy.savez(file, *args, **kwds)
file: This can be a filename as a string or a file-like object.*args: These are arrays as arguments to save in a specified file. Such arrays are saved in the file with names arr_0, arr_1, and so on.**kwds: These are arrays as keyword arguments to save in a file with the keyword as the array name. It does not return anything.
# import numpy and tempfile modulesimport numpy as npimport tempfile as file# create a temporary file in local storageoutfile = file.TemporaryFile()# creating four random arraysx1 = np.random.randint(0, 20, 10)x2 = np.random.randint(0, 50, 10)x3 = np.random.randint(0, 100, 10)x4 = np.random.randint(10, 100, 10)# invoking savez() methodnp.savez(outfile, a = x1, b = x2, c = x3, d = x4)# Required to simulate the closing and reopening file_ = outfile.seek(0)# It'll load pickled objects or .npy, .npz file in programnpzfile = np.load(outfile)# print 'a' to 'd' arraysprint("a =", npzfile['a'])print("b =", npzfile['b'])print("c =", npzfile['c'])print("d =", npzfile['d'])
TemporaryFile() method creates a temporary memory and returns a path-like object to outfile.x1, x2, x3, and x4.np.savez(outfile, a = x1, b = x2, c = x3, d = x4) command saves x1, x2, x3, and x4 as a, b, c, and d in outfile in .npz format.outfile.seek(0).np.load() to load the specified outfile from memory to program. .npz file.