94 lines
2.3 KiB
Markdown
94 lines
2.3 KiB
Markdown
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\[ [Index](index.md) | []() | [Exercise 1.2](ex1_2.md) \]
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# Exercise 1.1
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*Objectives:*
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- Make sure Python is installed correctly on your machine
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- Start the interactive interpreter
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- Edit and run a small program
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*Files Created:* `art.py`
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## (a) Launch Python
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Start Python3 on your machine. Make sure you can type simple
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statements such as the "hello world" program:
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```python
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>>> print('Hello World')
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Hello World
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>>>
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```
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In much of this course, you'll want to make sure you can work from
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the interactive REPL like this. If you're working from a different
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environment such as IPython or Jupyter Notebooks, that's fine.
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## (b) Some Generative Art
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Create the following program and put it in a file called `art.py`:
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```python
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# art.py
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import sys
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import random
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chars = '\|/'
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def draw(rows, columns):
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for r in rows:
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print(''.join(random.choice(chars) for _ in range(columns)))
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if __name__ == '__main__':
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if len(sys.argv) != 3:
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raise SystemExit("Usage: art.py rows columns")
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draw(int(sys.argv[1]), int(sys.argv[2]))
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```
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Make sure you can run this program from the command line or a terminal.
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```
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bash % python3 art.py 10 20
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```
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If you run the above command, you'll get a crash and traceback message.
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Go fix the problem and run the program again. You should get output like
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this:
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```
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bash % python3 art.py 10 20
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||||/\||//\//\|||\|\
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///||\/||\//|\\|\\/\
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|\////|//|||\//|/\||
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|//\||\/|\///|\|\|/|
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|/|//|/|/|\\/\/\||//
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|\/\|\//\\//\|\||\\/
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|||\\\\/\\\|/||||\/|
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\\||\\\|\||||////\\|
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//\//|/|\\|\//\|||\/
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\\\|/\\|/|\\\|/|/\/|
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bash %
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```
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### Important Note
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It is absolutely essential that you are able to edit, run, and debug
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ordinary Python programs for the rest of this course. The choice
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of editor, IDE, or operating system doesn't matter as long as you
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are able to experiment interactively and create normal Python source
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files that can execute from the command line.
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\[ [Solution](soln1_1.md) | [Index](index.md) | [Exercise 1.2](ex1_2.md) \]
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----
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`>>>` Advanced Python Mastery
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`...` A course by [dabeaz](https://www.dabeaz.com)
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`...` Copyright 2007-2023
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. This work is licensed under a [Creative Commons Attribution-ShareAlike 4.0 International License](http://creativecommons.org/licenses/by-sa/4.0/)
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