This content originally appeared on DEV Community and was authored by Kodwings
Introduction
In this article, we will learn to remove commas from strings using the python program. We will create a program using different methods and using different functions.
Table of contents
Using replace() function
Remove n number of comma from the strings using replace() function
Using regex() function
Conclusion
1. Remove commas using replace() function
We will use replace the () function to remove all commas from the string.
What is replace() function?
replace() is an in-built function in python, where replace() function is used to replace any characters from the given strings or is used to replace all occurrences of a substring from another substring.
So, using replace() function, we replace commas with blank, this can give strings that have no commas.
Input
string = I a,m ,A,nk,ur
Output
I am Ankur
Explanation
First we will take the input of strings from the user using the input() in-built function. (input() function takes a string as an input in python)
Now, we will create a new variable named new_string, in this variable, we will use replace() function.
replace() function takes two parameters, the first parameter contains substrings that we want to remove from the strings and another parameter contains another substring for replacing the first parameter in strings.
Lastly, we will print the new_string.
Program 1
# take input of string from user
string = input("Enter strings to remove commas: ")
# use replace() function
new_string = string.replace(",", "")
# print new_string
print(new_string)
Output
Enter strings to remove commas: I a,m ,A,nk,ur
I am Ankur
2. Remove n number of commas from the given strings using the remove() function
If we have to remove a specific number of commas from a given string, then we also do that using replace() in-built function of python.
replace() function is also used to remove a specific number of substrings from a given string in python programming.
So, replace() function takes 3 parameters, the first parameter contains substrings that we want to remove from the strings and the second parameter contains another substring for replacing the first parameter in strings and the last parameter is options used to remove a specific number of substrings from the given strings.
Removes n commas from the strings
Explanation
First, we will take the input of strings and n from the user using the input() in-built function of python. n is the number of commas that we have to remove from the strings.
Now, we will create a new variable named new_string, in this variable, we will use replace() function.
replace() function takes 3 parameters, the first parameter contains substrings that we want to remove from the strings and the second parameter contains another substring for replacing the first parameter in strings and the last parameter is options used to remove a specific number of substrings from the given strings.
Lastly print the new_string.
Program
# take input of string from user and n
string = input("Enter strings to remove commas: ")
n = int(input("How many commas do you want to remove from the string: "))
# use replace() function
new_string = string.replace(",", "",n)
# print new_string
print(new_string)
Output
Enter strings to remove commas: I, a,m An,kur
How many commas do you want to remove from the string: 2
I am An,kur
How do remove the first comma from the strings?
We will remove the first comma from the string using replace() function.
So, replace() function takes 3 parameters, the first parameter contains substrings that we want to remove from the strings and the second parameter contains another substring for replacing the first parameter in strings and the last parameter is options used to remove a specific number of substrings from the given strings.
Explanation
First, we will take the input of strings from the user using the input() in-built function of python.
Now, we will create a new variable named new_string, in this variable, we will use replace() function.
replace() function takes 3 parameters, the first parameter contains substrings that we want to remove from the strings and the second parameter contains another substring for replacing the first parameter in strings and the last parameter is options used to remove a specific number of substrings from the given strings.
Lastly print the new_string.
Program
# take input of string from user
string = input("Enter strings to remove commas: ")
# use replace() function
new_string = string.replace(",", "",1)
# print new_string
print(new_string)
Output
Enter strings to remove commas: I a,m Ankur
I am Ankur
3. Remove commas using the regex() package
We will use the regex() package to remove all commas from the strings in the python program.
regex() or re is a python package that contains a sub() function, which helps us to remove commas from the given strings.
re.sub() function helps to replace commas with blank.
Explanation
First, we will import the re package using import.
Then we will take the input of the string using the input() in-built function (The input function used to take strings input from the user).
Then we will create a variable named new_string that uses the re.sub() function to remove all commas.
re.sub() function takes 3 arguments, the first argument takes substrings that we want to remove from the strings and the second argument takes another substring for replacing the first substring in strings and the last argument takes the name of the string, which we want to remove all commas from it.
Then lastly print the new_string.
Program
# import re package
import re
# take input of string from user
string = input("Enter strings to remove commas: ")
# use re.sub|() function
new_string = re.sub(",", "", string)
# print new_string
print(new_string)
Output
Enter strings to remove commas: I, a,m An,kur
I am Ankur
Conclusion
In this article, we show multiple methods to remove commas from the strings. We use two methods for it, replace() and regex package, both methods are easy to implement in the program and we also see how to remove the n number of commas from the strings using replace function in python programming with examples and explanation.
This content originally appeared on DEV Community and was authored by Kodwings
Kodwings | Sciencx (2022-07-17T13:31:32+00:00) Remove Commas from String Python. Retrieved from https://www.scien.cx/2022/07/17/remove-commas-from-string-python/
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