Update task0.py

[tianjun0]

import csv
with open('texts.csv', 'r') as f:
reader = csv.reader(f)
texts = list(reader)
incoming number, answering number, time = zip(*texts)
incoming number = incoming number[0]
answering number = answering number[0]
time = time[0]
print("First record of texts, {} texts {} at time {}".format(incoming number, answering number, time))

with open('calls.csv', 'r') as f:
reader = csv.reader(f)
calls = list(reader)
incoming number, answering number, time, during = zip(*calls)
incoming number = incoming number[-1]
answering number = answering number[-1]
time = time[-1]
during = during[-1]
print("Last record of calls, {} calls {} at time {}, lasting {} seconds".format(incoming number, answering number, time, during number))