Task1.py

"""
Read file into texts and calls.
It's ok if you don't understand how to read files.
"""
import csv
with open('texts.csv', 'r') as f:
    reader = csv.reader(f)
    texts = list(reader)

with open('calls.csv', 'r') as f:
    reader = csv.reader(f)
    calls = list(reader)


"""
TASK 1:
How many different telephone numbers are there in the records? 
Print a message:
"There are <count> different telephone numbers in the records."
"""

def getNumbers(calls, texts):

    callNumbers = set()

    for number in calls:
        callNumbers.add(number[0])
        callNumbers.add(number[1])

    for number in texts:
        callNumbers.add(number[0])
        callNumbers.add(number[1])

    uniqueNumbers = len(callNumbers)

    outputString = "There are {} different telephone numbers in the records.".format(uniqueNumbers)
    print(outputString)

getNumbers(calls, texts)