"replace() method" fails to change string

[pw928gts]

Hi all,
New to Python and this forum so I guess i am missing something simple.
Why does this string method work in the Python shell but not when used in my PyCharm program?
Python version seems to make no difference.

import os
s = "ghghkc"
s.replace("g","#")
print (s)

[woooee]

"replace() method" fails to change string

You are wrong. The replace method did change the string, but you did not assign the return to a variable.

print(s.replace("g","#"))  ## string is changed

https://www.pythoncentral.io/pythons-str...n-strings/

[pw928gts]

Thanks i see the problem, but why no error message?

[wavic]

Notice that the string type is immutable. So the str.replace method does not replace the characters in place. You have to assign the returned value to a variable:

s = s.replace("g","#")

There is no reason for an error.

[nilamo]

Thanks i see the problem, but why no error message?

Because there wasn't an error. What you did is completely valid. You created a new string based off of a base string, s, and a transformation (the text replace). Not assigning that new string to a variable isn't an error, except possibly a semantic error: http://interactivepython.org/runestone/s...rrors.html