Checked docs on String.replace() not working anyway Python

Question

I have read all the python docs on String.replace, yet I am still having trouble with my code. My code is as follows:

#within a class
def fixdata(self):
    global inputs_list
    for i in range(0, len(inputs_list)):
        inputs_list[i].replace("\n", "")
        print(inputs_list[i]) # to check output

What I am hoping for is that all \n characters (newlines) are replaced with empty string ""so that trailing newlines are removed. .strip(), .rstrip(), and, I'm assuming, .lstrip() do not work.

Strings in python are immutable. You need to assign the result of `string.replace()` to something. — jordanm, Jan 06 '19 at 00:32

Patrick Artner · Accepted Answer · 2019-01-06T00:44:04.347

Dok: string.replace()

Return a copy of string s with all occurrences of substring old replaced by new. If the optional argument maxreplace is given, the first maxreplace occurrences are replaced.

You replace and throw the copy away:

#within a class
def fixdata(self):
    global inputs_list
    for i in range(0, len(inputs_list)):
        inputs_list[i].replace("\n", "")           # Thrown away
        print(inputs_list[i]) # to check output

More doku:

lstrip() / rstrip()/ strip()

Return a copy of the string ...

Fix:

def fixdata(self):
    global inputs_list   # a global in a class-method? pass it to the class and use a member?
    inputs_list = [item.rstrip() for item in input_lists]

score 0 · Answer 2 · answered Jan 06 '19 at 00:37

0

You need to assign the new string like this:

inputs_list[i] = inputs_list[i].replace("\n", "")

answered Jan 06 '19 at 00:37

Dan

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Checked docs on String.replace() not working anyway Python

2 Answers2