How to remove the last semicolon or comma from a Python string

Remove the last semicolon or comma from a Python string

The first method

Use the str.rstrip() method Remove the last comma from a string, e.g. new_str = my_str.rstrip(';'). The str.rstrip() method will return a copy of the string with the trailing commas removed

str = 'Color: High-top order notes; Size: 42;'

new_str = str.rstrip(' ;')

Running result:

The second method

str = '颜色:高帮下单备注;尺寸:42;'
new_str = ''.join(str.rsplit(';', 1))
print(new_str)  
颜色:高帮下单备注;尺寸:42

str.rstrip method takes a string containing characters as a parameter , and returns a copy of the string with the specified trailing characters removed

str = '颜色:高帮下单备注;尺寸:42;'
result = str.rstrip('42;')
print(result) 
 
str = '颜色:高帮下单备注;尺寸:'

Please note that the str.rstrip() method will only remove the comma if it is the last character in the string.

This method does not change the original string, it returns a new string. Strings are immutable in Python
The str.rstrip() method will remove all trailing commas from a string, not just the last one.

Alternatively, we can use the str.rsplit() method.

Use str.rsplit() to remove the last comma from the string

Remove the last comma from the string:

Use the str.rsplit() method to remove the characters The string is split once at the right comma.
Use the str.join() method to join the list into a string.

my_str = 'www,zadmei,com'
new_str = ''.join(my_str.rsplit(',', 1))
print(new_str)  # ????️ www,zadmeicom

The str.rsplit method returns a list of words in a string using the provided delimiter as the delimiter string.

my_str = 'fql zadmei com'
 
print(my_str.rsplit(' '))  # ????️ ['fql', 'zadmei', 'com']
print(my_str.rsplit(' ', 1))  # ????️ ['fql zadmei', 'com']

This method takes the following 2 parameters:

separator splits the string into substrings every time a separator appears
maxsplit does maxsplit splitting at most, rightmost The (optional)
rsplit() behaves like split() except that it splits from the right side.

The final step is to join the list into a string using the str.join() method.

The str.join method takes an iterable object as a parameter and returns a string that is the concatenation of the strings in the iterable object.

The string on which this method is called is used as a separator between elements.
We use the empty string delimiter to concatenate the list into a string without delimiters.

Added: Removing commas from strings in Python

This tutorial explains how to remove commas from strings using Python. To remove commas from strings in Python, we can use replace() method or re package.

We will use the string in the code snippet below to demonstrate how to remove commas from a string in Python.

my_string="Delft, Stack, Netherlands"
print(my_string)

Output:

Delft, Stack, Netherlands

Python str replace()# in class ## Method replaces the substring with the specified substring and returns the converted string.

str.replace(old, new , count)

old substring is replaced with the string of new substring.

my_string="Delft, Stack, Netherlands"
print("Original String is:")
print(my_string)
transformed_string=my_string.replace(",","")
print("Transformed String is:")
print(transformed_string)

Output:

Original String is:

Delft, Stack, Netherlands
Transformed String is:
Delft Stack Netherlands

It replaces all commas in the string

my_string with "". Therefore, all , in the string my_string are removed.

If we only want to delete the first

, in my_string, we can pass in the replace() method count parameter to achieve.

my_string="Delft, Stack, Netherlands"
print("Original String is:")
print(my_string)
transformed_string=my_string.replace(",","",1)
print("Transformed String is:")
print(transformed_string)

Output:

Original String is:

Delft, Stack, Netherlands
Transformed String is:
Delft Stack, Netherlands

Since the value of count is set to 1 in the

replace() method, it will only delete the first comma in the string my_string.

In Python's

re pacakge, we have the sub() method, which can also be used to remove commas from strings.

import re
my_string="Delft, Stack, Netherlands"
print("Original String is:")
print(my_string)
transformed_string=re.sub(",","",my_string)
print("Transformed String is:")
print(transformed_string)

Output:

Original String is:

Delft, Stack, Netherlands
Transformed String is:
Delft Stack Netherlands

It replaces all

, in the string my_string with "" and removes all commas in the string my_string.

re.sub() The first parameter of the method is the substring to be replaced, the second parameter is the substring to be replaced, and the third parameter is the substring to be replaced. The string to replace.

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