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Why doesn't datetime module work as it should?

Hello, I wanted to make a simple program that could count how old a person using it is, according to his/her birthday and datetime module. import datetime

now = datetime.now()
    if day == now.day and month == now.month:
         age = now.year - year
    if day != now.day or  month != now.month:
         age  = now.year - age - 1
    if now.year - year  == -1:
        print("Be serious, please.")
    if now.year - rok < -1:
        print("Be serious,please.")
    print(věk)

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I did this according to tutorials I found on the Internet, but when I want to run this piece of code, it says this: AttributeError: module 'datetime' has no attribute 'now' This project's purpose is only to show approximate age of people,so just the basics.
How to write this code correctly?

gelonida

Your code is not complete.
You don't show the import statement, but I guess, that this is a common issue with two solutions

solution one:

from datetime import datetime
now = datetime.now()

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solution two:

import datetime
now = datetime.datetime.now()

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the problem is, that the module datetime, contains an object with the same name as the module.
I personally am not really a big fan of this 'concept' and would at least advise against this whenever you create your own modules.
For existing modules you just have to pay attention to use the right import statement (from datetime import datetime) or you use double prefixes everywhere (datetime.datetime)

Petr Laškevič

ASKER

When I run this code:

from datetime import datetime
now = datetime.now()
    if day == now.day and month == now.month:
         age = now.year - year
    if day != now.day or  month != now.month:
         age  = now.year - age - 1
    if now.year - year  == -1:
        print("Be serious, please.")
    if now.year - rok < -1:
        print("Be serious,please.")
    print(age)

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It gives me the following error: TypeError: unsupported operand type(s) for -: 'int' and 'str'
And when I replace now.day with a variable I assigned to now.day,it also gives me this error.

now = datetime.now()
today = now.day 
current_month = now.month 
current_year = now.year
if day == now.day and month == now.month:
         age = current_year - year
if day != now.day or  month != now.month:
         age  = current_year - age - 1
if current_year - year  == -1:
        print("Be serious, please.")
if now.year - rok < -1:
        print("Be serious,please.")
print(age)

Open in new window

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gelonida

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Petr Laškevič

ASKER

Thank you very much. I forgot to close this question, so I close it two month later.