新用户可以使用已经存在的用户名（文本文件问题）创建一个帐户
我是Python的新手，并且正在尝试创建可靠的帐户创建和存储程序。当用户想创建一个新的用户名时，读取用户名_Storage文件以查看它是否已经存在于另一个帐户。
# Enter and check username
new_user = input("Username: ")
if new_user in username_storage:
print("Sorry, that username is already taken.\n")
else:
break
问题是，每当用户尝试使用现有用户名的一部分创建新帐户时，该程序就不允许它，因为它会注册新用户名在预制用户名中。
例如，如果“ William”是USERNAME_STOREAGE文本文件中的现有用户名，则不允许新的用户名“ Will”或“ Liam”，因为这些名称在“ William”中。
感谢任何能够回答这个问题的人；如果我还没有足够清楚地解释我的问题，请告诉我！
I'm relatively new to python and am trying to create a reliable account creation and storage program. When the user wants to create a new username, the username_storage file is read to see if it already exists for another account.
# Enter and check username
new_user = input("Username: ")
if new_user in username_storage:
print("Sorry, that username is already taken.\n")
else:
break
The problem is that whenever the user tries to create a new account using part of an existing username, the program does not allow it because it registers that the new username is inside a pre-made username.
e.g. if "william" is an existing username in the username_storage text file, it doesn't allow the new username "will" or "liam" because those names are inside "william".
Thanks to anyone who may be able to answer this question; if I haven't explained my problem clearly enough, please let me know!
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假设您在用户名中没有空间，会做您想做的事
would do what you want assuming you cant have spaces in the username