Remove final character from string
PythonStringPython Problem Overview
How do I remove the last character from a string?
"abcdefghij" → "abcdefghi"
Python Solutions
Solution 1 - Python
Simple:
my_str = "abcdefghij"
my_str = my_str[:-1]
Try the following code snippet to better understand how it works by casting the string as a list:
str1 = "abcdefghij"
list1 = list(str1)
print(list1)
list2 = list1[:-1]
print(list2)
In case, you want to accept the string from the user:
str1 = input("Enter :")
list1 = list(str1)
print(list1)
list2 = list1[:-1]
print(list2)
To make it take away the last word from a sentence (with words separated by whitespace like space):
str1 = input("Enter :")
list1 = str1.split()
print(list1)
list2 = list1[:-1]
print(list2)
Solution 2 - Python
What you are trying to do is an extension of string slicing in Python:
Say all strings are of length 10, last char to be removed:
>>> st[:9]
'abcdefghi'
To remove last N
characters:
>>> N = 3
>>> st[:-N]
'abcdefg'
Solution 3 - Python
The simplest solution for you is using string slicing.
Python 2/3:
source[0: -1] # gets all string but not last char
Python 2:
source = 'ABC'
result = "{}{}".format({source[0: -1], 'D')
print(result) # ABD
Python 3:
source = 'ABC'
result = f"{source[0: -1]}D"
print(result) # ABD
Solution 4 - Python
Using slicing, one can specify the start
and stop
indexes to extract part of a string s
. The format is s[start:stop]
. However, start = 0
by default. So, we only need to specify stop
.
Using stop = 3
:
>>> s = "abcd"
>>> s[:3]
'abc'
Using stop = -1
to remove 1
character from the end (BEST METHOD):
>>> s = "abcd"
>>> s[:-1]
'abc'
Using stop = len(s) - 1
:
>>> s = "abcd"
>>> s[:len(s) - 1]
'abc'
Solution 5 - Python
So there is a function called rstrip() for stuff like this. You enter the value you want to delete, in this case last element so string[-1] :
string = "AbCdEf"
newString = string.rstrip(string[-1])
print(newString)
If you runt his code you shouul see the 'f' value is deleted.
OUTPUT: AbCdE