How to show data by week with weeknumber?

Question

I have a huge list of dates and numbers like this:

 1.1.2018 0:00;2590
 3.1.2018 1:00;2530
 4.2.2018 2:00;1700
 6.2.2018 3:00;2340
 18.3.2018 4:00;1800
 15.4.2018 5:00;2850
 ...

And I need to add all numbers together that have the same week number and return total of numbers in a week like this:

0;0
1;549730
2;645010
3;681320
4;677060
5;698450
...etc
52;576280
53;81640

This is my code so far, I've separated the dates and numbers in their own lists but not sure how to go on from here.

import datetime

def main():
    file = open("2018Electricity.txt", "r")
    line = file.readline()
    time_list = []
    electricity_list = []
    total = []

    for i in file:
        time = i.strip().split(';')[0]
        electricity = i.strip().split(';')[1]
        time_list.append(datetime.strptime(time, '%d.%m.%Y %H:%M'))
        electricity_list.append(electricity)
        
    file.close()

main()

The task requires me to have weeks 0-53 and to use lists and strftime %W.

Answer 1

Here is the full code (explanations provided in the code as comments):

from datetime import datetime #You messed up with the import statement. It should be from datetime import datetime instead of import datetime

def main():
    file = open("2018Electricity.txt", "r")
    line = file.readline()
    time_list = []
    electricity_list = []
    total = []

    for i in file:
        time = i.strip().split(';')[0]
        electricity = i.strip().split(';')[1]
        datee = datetime.strptime(time, '%d.%m.%Y %H:%M')
        
        if  datee.month != 12:
            time_list.append(datee.isocalendar()[1])
        else:
            if datee.isocalendar()[1] == 1:
                time_list.append(53)
            else:
                time_list.append(datee.isocalendar()[1])

        electricity_list.append(int(electricity)) #Converts electricity to an integer and appends it to electricity_list

    week_numbers = list(set(time_list)) #Removes all repeated week numbers

    for week_number in week_numbers: #Iterates over the week_numbers
        curr_elec = 0
        for week,elec in zip(time_list,electricity_list): #Creates an iterable out of time_list and electricty_list
            if week == week_number:
                curr_elec += elec #Running total of the electricity for the current week
        print(f"{week_number};{curr_elec}")

    file.close()

main()

Output:

1;5120
5;1700
6;2340
11;1800
15;2850