Question

Starting out with Python 4th edition

I need help I followed a tutorial and have messed up also how does one include IOError and IndexError exception handling?

I'm getting errors: Traceback (most recent call last):
File, line 42, in <module>
main()
File , line 37, in main
winning_times = years_won(user_winning_team_name, winning_teams_list)
File , line 17, in years_won
for winning_team_Index in range(len(list_of_teams)):
TypeError: object of type '_io.TextIOWrapper' has no len()

Write program champions.py to solve problem 7.10. Include IOError and IndexError exception handling.

Output:

Enter the name of a team: Boston Red Sox

The Boston Red Sox won the world series 6 times between 1903 and 2009.

def world_series_list(file_name):
teams = open(file_name, 'r')
winning_teams_list = []

winning_team = teams.readline()

while winning_team != "":
winning_team.rstrip('\n')
winning_teams_list.append(winning_team)
winning_team = teams.readline()
return teams

def years_won(winning_team, list_of_teams):
winning_times = 0

for winning_team_Index in range(len(list_of_teams)):
if list_of_teams[winning_team_Index] == winning_team:
winning_times = winning_times + 1

return winning_times

def championships(winning_team_name, winning_times):
print(winning_team_name, "won the World Series", winning_times, 'times between 1903 and 2009')

def main():
file_name = 'WorldSeriesWinners.txt'

winning_teams_list = world_series_list(file_name)

print(winning_teams_list)

user_winning_team_name = input("Please enter team name: ")

winning_times = years_won(user_winning_team_name, winning_teams_list)

championships(user_winning_team_name, winning_times)

main()

Answer 1

def world_series_list(file_name):
try:
teams = open(file_name, 'r')
except:
print('File not Found')
return []
winning_teams_list = []
winning_team = teams.readline()
while winning_team != "":
winning_team.rstrip('\n')
winning_teams_list.append(winning_team)
winning_team = teams.readline()
return winning_teams_list #The error was in this line you were returning teams instead of list object

def years_won(winning_team, list_of_teams):
winning_times = 0
for winning_team_Index in range(len(list_of_teams)):
if list_of_teams[winning_team_Index] == winning_team:
winning_times = winning_times + 1
return winning_times

def championships(winning_team_name, winning_times):
print(winning_team_name, "won the World Series", winning_times, 'times between 1903 and 2009')

def main():
file_name = 'WorldSeriesWinners.txt'
winning_teams_list = world_series_list(file_name)
print(winning_teams_list)
user_winning_team_name = input("Please enter team name: ")
winning_times = years_won(user_winning_team_name, winning_teams_list)
championships(user_winning_team_name, winning_times)

main()

The code snippet screenshot

Only change is in the first function rest is same