Gain insights into Pythonic programming techniques. Learn about documentation, data types, safety, performance, and function design to write fast, maintainable, and correct Python code.

python3.8.tar.gz

Python3.8

Python3.8Code

This course is an invaluable resource for anyone who wants to learn the correct Pythonian way of writing highly performant code that is easy to maintain and grow.

The course is divided into six chapters: documentation tips, data types/data structures tips, safety tips, performance tips, function design tips, and general tips. Throughout each chapter, you will get hands-on experience working with real Python code to help ingrain each concept.

By the end, you will know how to make your programs correct, safe, fast, and easy to maintain.

Pythonic Programming Tips for Software Engineers

# Strip user input
Many developers claim to know how to read user input from the console.

We should display a prompt just before the program stops and wait for the user input (presumably by calling the function `input()`). The prompt should explain concisely, in a language suitable to the expected user, what the user should input and how. It is customary, but not required, for a prompt to end with a colon and space.

We can use the function `print()` to display the prompt, followed by `input()` to collect the input. A better solution is to let `input()` speak for itself; if we pass an argument to `input()`. For example, if we want the user to enter his/her age, then

```python
age = input('Enter your age: ')
```


But there's a twist: when asked to enter something, a user may add extra spaces before or after the requested information, intentionally or otherwise. An evil user may insert additional spaces in the middle, too, but handling that kind of user is beyond the scope of this course.

If we use the `input()` function to request a number, we will further call `int()` or `float()`, both of which are trained to discard the heading and trailing spaces. This is not so with general strings. It is our responsibility to make sure that the spaces don't make their way into the system. The most common problem scenarios are when the user enters the new username or, especially, the password (because the password input is typically invisible and hard to control). Play it safe by stripping user input with `str.strip()`!

Learn how to take input from users and handle exceptions in a Pythonic way.

Introduction

Documentation Tips

General Tips

Data Types and Data Structures Tips

Function Tips

Performance Tips

Safety Tips

Wrapping Up

Input and Exception Tips

Strip user input