Curso Python. Documentación. Vídeo 75
Introduction to Documentation in Python
In this section, we will learn about the importance of documentation in Python programming and how it can help improve teamwork and understanding of complex applications.
Importance of Documentation
- Documentation involves including comments in methods, classes, modules, etc., throughout a program.
- It helps improve teamwork and collaboration, especially in complex applications with multiple classes and methods.
- Documenting programs is beneficial even when working individually on a complex application as it aids in understanding the code after a long period of time.
Example Program with Functions
In this section, we explore an example program that includes two functions for calculating the area of a square and triangle. We will see how to document these functions using comments.
Documenting Functions
- Comments can be added to functions by using triple quotes (''' ''') before the function definition.
- These comments explain the purpose and functionality of the function.
- The comments can include details such as parameter descriptions or calculations performed by the function.
- The documentation can be viewed during execution by using
print(function_name.__doc__)orhelp(function_name).
Printing Function Documentation
In this section, we learn how to print function documentation during program execution using different methods.
Printing Function Documentation
- To print function documentation during execution, use
print(function_name.__doc__).
- This method directly prints the documentation associated with the function without executing it beforehand.
- Another way to view function documentation is by using
help(function_name), which provides more detailed information about the function's definition and associated documentation.
Documenting Functions within Classes
In this section, we explore how to document functions within classes and access their documentation using the help() function.
Documenting Functions within Classes
- Functions within classes can be documented in a similar way as standalone functions.
- By creating a class and indenting the functions under it, we can associate the functions with the class.
- To access function documentation within a class, use
help(class_name.function_name).
Conclusion
Documentation plays a crucial role in Python programming by providing clarity and understanding of code. It helps improve teamwork, facilitates code maintenance, and allows for easier comprehension of complex applications. By documenting our programs effectively, we enhance collaboration and ensure that future developers can easily understand and work with our code.
Using the help function with classes
This section explains how to use the help function with classes in Python.
Accessing class-specific help
- To access class-specific help, use the name of the class followed by a dot and the function name. For example:
help(areas.point.area_triangles).
- Executing this command will display the official documentation for the
area_trianglesfunction within theareas.pointclass.
- By simply using the name of the class (
help(areas)), you can get a more general help for the entire class.
Documenting classes and methods
- In Python, it is possible to include comments for classes and methods.
- After defining a class, comments can be added using triple quotes. For example:
class CalculateAreas:
"""
This class calculates areas of different geometric figures.
"""
def area_triangle(self):
"""
Calculates the area of a triangle.
"""
Function code here
- When executing
help(CalculateAreas), both the documentation for the class and each method will be displayed.
Including comments in modules
- Comments can also be included in modules using triple quotes.
- For example, if we have a module called "math_functions.py", we can add comments like this:
"""
This module allows basic math operations.
"""
def add_numbers(a, b):
"""
Adds two numbers together.
"""
Function code here
- To use this module, import it first (
from math_functions import *) before accessing its functions anywhere in your code.
Summary
In summary, Python provides ways to access specific help for classes and their methods using the help function. It is also possible to include comments for classes, methods, and modules to provide additional documentation.