python – Remove final character from string

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)

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

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