为什么我得到这个 NameError: name "dt' is not defined

Question

I'm new to Python and I'm trying to scrape reddit and convert the UNIX timestamp into a date. However, when I run this code I'm getting a Name Error. Can anyone tell me why I'm getting this error? Thanks.

from datetime import datetime
def get_date(created):
    return dt.datetime.fromtimestamp(created)

_timestamp = topics_data["created"].apply(get_date)

Answer 1

dt means nothing in your current code what the interpreter kindly tells you.

What you're trying to do is to call a datetime.datetime.fromtimestamp()

You can change your import to:

import datetime as dt

and then dt will be an alias for datetime package so dt.datetime.fromtimestamp(created) will work.

But this is not the only solution. The below also will work:

import datetime
datetime.datetime.fromtimestamp(created)

from datetime import datetime
datetime.fromtimestamp(created)

You can check this out to have a better understatement of the differences.