__doc__

Definition

__doc__ is a special attribute in Python that provides a way to access the docstring associated with a function, module, or class. A docstring is a string literal that appears as the first statement in a Python object, serving as a brief description or documentation for that object.

5 Must Know Facts For Your Next Test

1. The __doc__ attribute can be accessed for functions, modules, and classes to retrieve their associated docstrings.
2. Docstrings are enclosed within triple quotes (''' or '') and can span multiple lines, providing detailed documentation for the object.
3. The help() function in Python uses the __doc__ attribute to display the docstring and other information about a Python object.
4. Docstrings are considered a best practice in Python and are often used to provide clear and concise explanations of the purpose, parameters, and return values of functions.
5. While comments are used to provide explanations or notes within the code, docstrings are part of the object's metadata and can be accessed programmatically.

Review Questions

• Explain the purpose of the __doc__ attribute in Python and how it relates to the concept of comments.
  • The __doc__ attribute in Python provides a way to access the docstring associated with a function, module, or class. Docstrings are string literals that appear as the first statement in a Python object, serving as a brief description or documentation for that object. While comments are used to provide explanations or notes within the code, docstrings are part of the object's metadata and can be accessed programmatically, such as through the help() function. Docstrings are considered a best practice in Python and are often used to provide clear and concise explanations of the purpose, parameters, and return values of functions.
• Describe how the __doc__ attribute is used in the context of the help() function in Python.
  • The help() function in Python uses the __doc__ attribute to display the docstring and other information about a Python object, such as a function, module, or class. When you call the help() function on an object, it retrieves the object's __doc__ attribute and presents it to the user, providing a detailed explanation of the object's purpose, parameters, and functionality. This makes the help() function a valuable tool for exploring and understanding the documentation of Python objects, especially when working with unfamiliar code or libraries.
• Analyze the relationship between __doc__ and the concept of comments in Python, and explain how they differ in their purpose and usage.
  • The __doc__ attribute and comments in Python serve different purposes. Comments are text within the code that are ignored by the interpreter and are used to provide explanations or notes for the programmer. In contrast, the __doc__ attribute is a string literal that is part of the object's metadata and can be accessed programmatically, such as through the help() function. Docstrings are considered a best practice in Python and are often used to provide clear and concise explanations of the purpose, parameters, and return values of functions, modules, and classes. While comments are used to provide contextual information within the code, docstrings are a more formal and structured way of documenting Python objects, making them more accessible and useful for both developers and users of the code.

Related terms

Docstring: A string literal that appears as the first statement in a Python object, providing a brief description or documentation for that object.

Help Function: A built-in function in Python that displays the docstring and other information about a Python object, such as a function, module, or class.

Comments: Text in a Python program that is ignored by the interpreter and used to provide explanations or notes for the code.