如何使用其他库在python中创建自己的库？

Question

I am trying to create my own library in Python with simple functions that I use often use. And sometimes in these functions I use others function from Pandas, Numpy or datetime.

For example:

def tm(time, date):
    hhour = int(time[:2])
    mminute = int(time[3:5])
    ssecond = int(time[6:8])
    return(datetime.datetime(date[2], date[1], date[0], hhour, mminute, ssecond))

The problem is that when I import my library in other files, these functions do not work. Even when I import in this file datetime, I still get an error:

NameError: name 'datetime' is not defined

When I run this function directly (by copy-pasting the code) it is working.

How can i import in my file my library with all functions working?

Thanks a lot for any answers!

Answer 1

You'll have to import the datetime somewhere, either in the other .py file that you're calling it from or in the function itself.

def tm(time, date):
    import datetime
    hhour = int(time[:2])
    mminute = int(time[3:5])
    ssecond = int(time[6:8])
    return(datetime.datetime(date[2], date[1], date[0], hhour, mminute, ssecond))