Debug python only using print with minimum typing смотреть онлайн

Debugging in Python is an essential skill for any programmer. While there are sophisticated debugging tools and integrated development environments available, you can often use a simple and effective method: using print statements. In this tutorial, we'll explore how to debug Python code effectively using print statements with minimal typing.
Table of Contents
1. Basic Debugging with print
The most basic way to use print for debugging is to insert print statements in your code to display values or messages at specific points. For example:
By adding these print statements, you can see when your code enters and exits the function, which helps you identify issues.
2. Printing Variable Values
To examine the values of variables, you can use f-strings or the str.format method to include the variable values in your print statements:
This approach allows you to monitor variable values at different points in your code.
3. Conditional Printing
Sometimes, you only want to print information when a specific condition is met. You can achieve this with if statements:
Conditionally printing information helps you focus on relevant details during debugging.
4. Using logging for Debugging
Python has a built-in logging module that provides a more advanced way to perform debugging. You can use logging to log messages at different levels, such as DEBUG, INFO, WARNING, ERROR, and CRITICAL. Here's a basic example:
Using logging allows you to control the verbosity of your debugging output, making it more flexible and powerful.
5. Debugging Example
Let's consider a simple debugging example. We have a function that calculates the factorial of a number:
To debug this code, you can insert print statements:
This will help you understand how the function is working and identify any issues.
6. Conclusion
Debugging Python code with print statements is a straightforward and effective approach, especially for small to medium-sized projects. By strategically placing print statements and controlling their output, you can quickly identify and fix issues in your code. Remember to remove or comment out debugging statements when your code is production-ready to avoid cluttering your output.
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