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NumPy: Multiply two given arrays of same size element-by-element

NumPy: Basic Exercise-59 with Solution

Write a NumPy program to multiply two given arrays of same size element-by-element.

Sample Solution:

Python Code:

import numpy as np 
nums1 = np.array([[2, 5, 2],
              [1, 5, 5]])
nums2 = np.array([[5, 3, 4],
              [3, 2, 5]])
print("Array1:") 
print(nums1)
print("Array2:") 
print(nums2)
print("\nMultiply said arrays of same size element-by-element:")
print(np.multiply(nums1, nums2))

Sample Output:

Array1:
[[2 5 2]
 [1 5 5]]
Array2:
[[5 3 4]
 [3 2 5]]

Multiply said arrays of same size element-by-element:
[[10 15  8]
 [ 3 10 25]]

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