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+---
+id: practical-python-3.16
+source_exercise_id: "3.16"
+title: "Making Scripts"
+section: "3.5 Main Module"
+source_path: "03_Program_organization/05_Main_module.md"
+source_repo: "https://github.com/dabeaz-course/practical-python"
+source_commit: "93dca856b41c61a0a0f85ae334116e4c125629ea"
+student_visible_solution: false
+has_private_solution: true
+skip: false
+---
+
+# Exercise 3.16: Making Scripts
+
+> Source: Practical Python Programming, `03_Program_organization/05_Main_module.md`.
+
+### Exercise 3.16: Making Scripts
+
+Modify the `report.py` and `pcost.py` programs so that they can
+execute as a script on the command line:
+
+```bash
+bash $ python3 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
+
+bash $ python3 pcost.py Data/portfolio.csv
+Total cost: 44671.15
+```
+
+[Contents](../Contents.md) \| [Previous (3.4 Modules)](04_Modules.md) \| [Next (3.6 Design Discussion)](06_Design_discussion.md)
+
+## 关联来源
+
+- [[summaries/05_Main_module]]