Python – Replace all numbers by K in given String
Given a string containing numbers, replace each number by K.
Input : test_str = ‘G4G is 4 all No. 1 Geeks’, K = ‘#’
Output : G#G is # all No. # Geeks
Explanation : All numbers replaced by K.Attention geek! Strengthen your foundations with the Python Programming Foundation Course and learn the basics.
To begin with, your interview preparations Enhance your Data Structures concepts with the Python DS Course. And to begin with your Machine Learning Journey, join the Machine Learning - Basic Level Course
Input : test_str = ‘G4G is 4 all No. Geeks’, K = ‘#’
Output : G#G is # all No. Geeks
Explanation : All numbers replaced by K.
Method #1 : Using replace() + isdigit()
In this, we check for numerics using isdigit() and replace() is used to perform the task of replacing the numbers by K.
Python3
# Python3 code to demonstrate working of # Replace numbers by K in String# Using replace() + isdigit() # initializing stringtest_str = 'G4G is 4 all No. 1 Geeks' # printing original stringprint("The original string is : " + str(test_str)) # initializing K K = '@' # loop for all charactersfor ele in test_str: if ele.isdigit(): test_str = test_str.replace(ele, K) # printing result print("The resultant string : " + str(test_str)) |
The original string is : G4G is 4 all No. 1 Geeks The resultant string : G@G is @ all No. @ Geeks
Method #2 : Using regex() + sub()
In this, appropriate regex is used to identify digits and sub() is used to perform replace.
Python3
# Python3 code to demonstrate working of # Replace numbers by K in String# Using regex() + sub()import re # initializing stringtest_str = 'G4G is 4 all No. 1 Geeks' # printing original stringprint("The original string is : " + str(test_str)) # initializing K K = '@' # using regex expression to solve problem res = re.sub(r'\d', K, test_str) # printing result print("The resultant string : " + str(res)) |
The original string is : G4G is 4 all No. 1 Geeks The resultant string : G@G is @ all No. @ Geeks
