index error in python
# main.py
import datetime
from gw_utility.book import Book
from gw_utility.logging import Logging
def main():
try:
# Create list and populate with Books.
books = list()
books.append(Book("Shadow of a Dark Queen", "Raymond E. Feist", 497, datetime.date(1994, 1, 1)))
books.append(Book("Rise of a Merchant Prince", "Raymond E. Feist", 479, datetime.date(1995, 5, 1)))
books.append(Book("Rage of a Demon King", "Raymond E. Feist", 436, datetime.date(1997, 4, 1)))
# Output Books in list, with and without index.
Logging.line_separator('Books')
log_list(books)
Logging.line_separator('Books w/ index')
log_list(books, True)
# Output list element outside bounds.
Logging.line_separator('books[len(books)]')
Logging.log(f'books[{len(books)}]: {books[len(books)]}')
except IndexError as error:
# Output expected IndexErrors.
Logging.log_exception(error)
except Exception as exception:
# Output unexpected Exceptions.
Logging.log_exception(exception, False)
def log_list(collection, include_index=False):
"""Logs the each element in collection to the console.
:param collection: Collection to be iterated and output.
:param include_index: Determines if index is also output.
:return: None
"""
try:
# Iterate by converting to enumeration.
for index, item in enumerate(collection):
if include_index:
Logging.log(f'collection[{index}]: {item}')
else:
Logging.log(item)
except IndexError as error:
# Output expected IndexErrors.
Logging.log_exception(error)
except Exception as exception:
# Output unexpected Exceptions.
Logging.log_exception(exception, False)
if __name__ == "__main__":
main()