将字符串中的字符替换为“@”

Question

Why python does not replace last character for @?

str_manip = input("Enter a sentence ")
last_char = str_manip[-1]
print(last_char)
change_char = str_manip.replace("last_char", "@")
print(change_char)

It comes up as exactly the same sentence as I enter, unchanged.

I have read a few websites and still do not understand. I thought maybe it was because @ is char but str() doesn't help, saving it as separate string variable also doesn't work.

Answer 1

Try this

str_manip = input("Enter a sentence ")
last_char = str_manip[-1]
print(last_char)
change_char = str_manip.replace(last_char, "@")
print(change_char)

Answer 2

Replace

change_char = str_manip.replace("last_char", "@")

by

change_char = str_manip.replace(last_char, "@")