NumPy: Save two given arrays into a single file in compressed format and load it
NumPy: Basic Exercise-36 with Solution
Write a NumPy program to save two given arrays into a single file in compressed format (.npz format) and load it.
Sample Solution :
Python Code :
import numpy as np
import os
x = np.arange(10)
y = np.arange(11, 20)
print("Original arrays:")
print(x)
print(y)
np.savez('temp_arra.npz', x=x, y=y)
print("Load arrays from the 'temp_arra.npz' file:")
with np.load('temp_arra.npz') as data:
x2 = data['x']
y2 = data['y']
print(x2)
print(y2)
Sample Output:
Original arrays: [0 1 2 3 4 5 6 7 8 9] [11 12 13 14 15 16 17 18 19] Load arrays from the 'temp_arra.npz' file: [0 1 2 3 4 5 6 7 8 9] [11 12 13 14 15 16 17 18 19]
Python-Numpy Code Editor:
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Python: Tips of the Day
Find current directory and file's directory:
To get the full path to the directory a Python file is contained in, write this in that file:
import os dir_path = os.path.dirname(os.path.realpath(__file__))
(Note that the incantation above won't work if you've already used os.chdir() to change your current working directory, since the value of the __file__ constant is relative to the current working directory and is not changed by an os.chdir() call.)
To get the current working directory use
import os cwd = os.getcwd()
Documentation references for the modules, constants and functions used above:
- The os and os.path modules.
- The __file__ constant
- os.path.realpath(path) (returns "the canonical path of the specified filename, eliminating any symbolic links encountered in the path")
- os.path.dirname(path) (returns "the directory name of pathname path")
- os.getcwd() (returns "a string representing the current working directory")
- os.chdir(path) ("change the current working directory to path")
Ref: https://bit.ly/3fy0R6m
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