I have a list of usernames. Only usernames that aren't already in the text file should be added. Issue is that usernames that are already in there are getting added. I am printing the list to make sure it's working. Getting this error: Redeclared 'myList' defined above without usage.

myList = []

with open('list.txt', 'r') as file:
    myList = file.readlines()

print(myList)

username = input("Enter username: ")

if username not in myList:
    with open("list.txt", 'a ') as output:
        output.write(str(username)   "\n")
    print(f"Successfully added {username} to list")
else:
    print(f"{username} already exists in list")

         

CodePudding user response：

I'm pretty sure that this line

myList = file.readlines() returning with \n every line

so change it to

myList = [line.rstrip() for line in file.readlines()]