coding-mentor-agent/kb/python-course-kb-practical-python/wiki/exercises/3-15-main-functions.md

id, source_exercise_id, title, section, source_path, source_repo, source_commit, student_visible_solution, has_private_solution, skip

id	source_exercise_id	title	section	source_path	source_repo	source_commit	student_visible_solution	has_private_solution	skip
practical-python-3.15	3.15	`main()` functions	3.5 Main Module	03_Program_organization/05_Main_module.md	https://github.com/dabeaz-course/practical-python	93dca856b41c61a0a0f85ae334116e4c125629ea	false	false	false

Exercise 3.15: main() functions

Source: Practical Python Programming, 03_Program_organization/05_Main_module.md.

Exercise 3.15: main() functions

In the file report.py add a main() function that accepts a list of command line options and produces the same output as before. You should be able to run it interactively like this:

>>> import report
>>> report.main(['report.py', 'Data/portfolio.csv', 'Data/prices.csv'])
      Name     Shares      Price     Change
---------- ---------- ---------- ----------
        AA        100       9.22     -22.98
       IBM         50     106.28      15.18
       CAT        150      35.46     -47.98
      MSFT        200      20.89     -30.34
        GE         95      13.48     -26.89
      MSFT         50      20.89     -44.21
       IBM        100     106.28      35.84
>>>

Modify the pcost.py file so that it has a similar main() function:

>>> import pcost
>>> pcost.main(['pcost.py', 'Data/portfolio.csv'])
Total cost: 44671.15
>>>

关联来源

• summaries/05_Main_module