---
id: practical-python-3.18
source_exercise_id: "3.18"
title: "Fixing existing functions"
section: "3.6 Design Discussion"
source_path: "03_Program_organization/06_Design_discussion.md"
source_repo: "https://github.com/dabeaz-course/practical-python"
source_commit: "93dca856b41c61a0a0f85ae334116e4c125629ea"
student_visible_solution: false
has_private_solution: true
skip: false
---

# Exercise 3.18: Fixing existing functions

> Source: Practical Python Programming, `03_Program_organization/06_Design_discussion.md`.

### Exercise 3.18: Fixing existing functions

Fix the `read_portfolio()` and `read_prices()` functions in the
`report.py` file so that they work with the modified version of
`parse_csv()`.  This should only involve a minor modification.
Afterwards, your `report.py` and `pcost.py` programs should work
the same way they always did.

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## 关联来源

- [[summaries/06_Design_discussion]]