Python 3 .lower() function returning error

Question

I am making a Reddit bot (pretty much irrelevant.), and I am trying to check if the text: [submission] is in the title of any submission in a Subreddit.

Here is my code: (I have all of the tokens and secrets and things already set, along with a subreddit.)

for submission in reddit.subreddit("MinecraftCommandJam").new():
    lowercaseT = str(submission.title()).lower()
    if '[submission]' in lowercaseT:
        print(submission.title)

But when I run the code, this error occurs (python 3)

Traceback (most recent call last):
  File "c:\Users\hjdom\reddit_bot_mcj\reddit_bot.py", line 42, in <module>
    lowercaseT = str(submission.title()).lower()
TypeError: 'str' object is not callable
PS C:\Users\hjdom\reddit_bot_mcj> 

Answer 1

Please, always provide a minimal, reproducible example so that we can copy-paste-tweak your code and help you.

By googling a bit, I found that praw.models.Submission objects have a .title attribute, a str. So the error TypeError: 'str' object is not callable is not caused by calling .lower(), but by submission.title() instead.

Since submission.title is already a str, this should work:

for submission in reddit.subreddit("MinecraftCommandJam").new():
    lowercaseT = submission.title.lower()
    if '[submission]' in lowercaseT:
        print(submission.title)