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Task4.py
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Task4.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 4:
The telephone company want to identify numbers that might be doing
telephone marketing. Create a set of possible telemarketers:
these are numbers that make outgoing calls but never send texts,
receive texts or receive incoming calls.
Print a message:
"These numbers could be telemarketers: "
<list of numbers>
The list of numbers should be print out one per line in lexicographic order with no duplicates.
"""
candidate_marketers = set()
not_marketers = set()
for record in calls:
# candidate marketer: makes outgoing calls
candidate_marketers.add(record[0])
# definitely not marketer: receives calls
not_marketers.add(record[1])
# exclude texters also
for record in texts:
not_marketers.add(record[0])
not_marketers.add(record[1])
marketers = candidate_marketers - not_marketers
print("These numbers could be telemarketers: ")
for marketer in sorted(marketers):
print(marketer)