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NumPy: Replace a specific character with another in a given array of string values

NumPy String: Exercise-20 with Solution

Write a NumPy program to replace a specific character with another in a given array of string values.

Sample Solution:

Python Code:

import numpy as np 

str1 = np.array([['Python-NumPy-Exercises'],
              ['-Python-']])
print("Original array of string values:") 
print(str1)
print("\nReplace '-' with '=' character in the said array of string values:")
print(np.char.strip(np.char.replace(str1, '-', '==')))
print("\nReplace '-' with ' ' character in the said array of string values:")
print(np.char.strip(np.char.replace(str1, '-', ' ')))

Sample Output:

Original array of string values:
[['Python-NumPy-Exercises']
 ['-Python-']]

Replace '-' with '=' character in the said array of string values:
[['Python==NumPy==Exercises']
 ['==Python==']]

Replace '-' with ' ' character in the said array of string values:
[['Python NumPy Exercises']
 ['Python']]

Python Code Editor:

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Python: Tips of the Day

Returns the symmetric difference between two lists, after applying the provided function to each list element of both:

Example:

def tips_symmetric_difference_by(p, q, fn):
  _p, _q = set(map(fn, p)), set(map(fn, q))
  return [item for item in p if fn(item) not in _q] + [item for item in q if fn(item) not in _p]
from math import floor
print(tips_symmetric_difference_by([4.2, 2.4], [4.6, 6.8],floor))

Output:

[2.4, 6.8]