reader = csv.reader(f)
calls = list(reader)
"""
TASK 2: Which telephone number spent the longest time on the phone
during the period? Don't forget that time spent answering a call is
also time spent on the phone.
Print a message:
"<telephone number> spent the longest time, <total time> seconds, on the phone during
September 2016.".
"""
# Steps:
# Get the list of unique numbers from task 1
ListOfUniqueNo, column_search = Task1.task1()
callDuration = 0
# Create a map of Unique numbers initialize the value to 0 this is placeholder to add time spent on call
map_numbers = dict.fromkeys(ListOfUniqueNo, callDuration)
# Update the existing Key value with the sum of prev value + next value
def task2_Opt(ListOfUniqueNo, column_search): # O(2n)
for i in range(column_search):
for row in calls:
if row[i] in map_numbers.keys():
x = map_numbers[row[i]]
x = x + int(row[3])
map_numbers.update({row[i]: x})
