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Task3.py
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Task3.py
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"""
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 3:
(080) is the area code for fixed line telephones in Bangalore.
Fixed line numbers include parentheses, so Bangalore numbers
have the form (080)xxxxxxx.)
Part A: Find all of the area codes and mobile prefixes called by people
in Bangalore.
- Fixed lines start with an area code enclosed in brackets. The area
codes vary in length but always begin with 0.
- Mobile numbers have no parentheses, but have a space in the middle
of the number to help readability. The prefix of a mobile number
is its first four digits, and they always start with 7, 8 or 9.
- Telemarketers' numbers have no parentheses or space, but they start
with the area code 140.
Print the answer as part of a message:
"The numbers called by people in Bangalore have codes:"
<list of codes>
The list of codes should be print out one per line in lexicographic order with no duplicates.
Part B: What percentage of calls from fixed lines in Bangalore are made
to fixed lines also in Bangalore? In other words, of all the calls made
from a number starting with "(080)", what percentage of these calls
were made to a number also starting with "(080)"?
Print the answer as a part of a message::
"<percentage> percent of calls from fixed lines in Bangalore are calls
to other fixed lines in Bangalore."
The percentage should have 2 decimal digits
"""
unique_codes = set()
total_calls_from_bangalore = 0
count_local_calls_bangalore = 0
for record in calls:
# Call from Bangalore?
if "(080)" in record[0]:
total_calls_from_bangalore += 1
# To fixed line?
if "(0" in record[1] and ")" in record[1]:
# cut off all after closing bracket inclusive
area_code = record[1].split(")")[0]
# cut off opening bracket
unique_codes.add(area_code[1:])
# Local Bangalore call?
if "(080)" in record[1]:
count_local_calls_bangalore += 1
# To mobile number?
elif " " in record[1] and (record[1][0] == "7" or record[1][0] == "8" or record[1][0] == "9"):
# add first 4 chars
unique_codes.add(record[1][:4])
print("The numbers called by people in Bangalore have codes:")
sorted_codes = sorted(list(unique_codes))
for code in sorted_codes:
print(code)
# B part
percentage_local_bangalore_calls = 0.0
if total_calls_from_bangalore != 0:
percentage_local_bangalore_calls = count_local_calls_bangalore / total_calls_from_bangalore * 100
print("{:.2f} percent of calls from fixed lines in Bangalore are calls to other fixed lines in Bangalore."
.format(percentage_local_bangalore_calls))