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NumPy: Create an array of 10 zeros, 10 ones, 10 fives

NumPy: Basic Exercise-13 with Solution

Write a NumPy program to create an array of 10 zeros, 10 ones, 10 fives.

Sample Solution :

Python Code :

import numpy as np
array=np.zeros(10)
print("An array of 10 zeros:")
print(array)
array=np.ones(10)
print("An array of 10 ones:")
print(array)
array=np.ones(10)*5
print("An array of 10 fives:")
print(array)

Sample Output:

An array of 10 zeros:
[ 0.  0.  0.  0.  0.  0.  0.  0.  0.  0.]
An array of 10 ones:
[ 1.  1.  1.  1.  1.  1.  1.  1.  1.  1.]
An array of 10 fives:
[ 5.  5.  5.  5.  5.  5.  5.  5.  5.  5.]

Pictorial Presentation:

NumPy: Create an array of 10 zeros, 10 ones, 10 fives.
NumPy: Create an array of 10 zeros, 10 ones, 10 fives.
NumPy: Create an array of 10 zeros, 10 ones, 10 fives.

Python-Numpy Code Editor:

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Previous: Write a NumPy program to create an array with the values 1, 7, 13, 105 and determine the size of the memory occupied by the array.
Next: Write a NumPy program to create an array of the integers from 30 to70.

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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