coding-mentor-agent/kb/python-course-kb-practical-python/wiki/exercises/4-4-using-your-class.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-4.4	4.4	Using your class	4.1 Classes	04_Classes_objects/01_Class.md	https://github.com/dabeaz-course/practical-python	93dca856b41c61a0a0f85ae334116e4c125629ea	false	true	false

Exercise 4.4: Using your class

Source: Practical Python Programming, 04_Classes_objects/01_Class.md.

Exercise 4.4: Using your class

Modify the read_portfolio() function in the report.py program so that it reads a portfolio into a list of Stock instances as just shown in Exercise 4.3. Once you have done that, fix all of the code in report.py and pcost.py so that it works with Stock instances instead of dictionaries.

Hint: You should not have to make major changes to the code. You will mainly be changing dictionary access such as s['shares'] into s.shares.

You should be able to run your functions the same as before:

>>> import pcost
>>> pcost.portfolio_cost('Data/portfolio.csv')
44671.15
>>> import report
>>> report.portfolio_report('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
>>>

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关联来源

• summaries/01_Class