Python modules play an important role in structuring and organizing code in Python projects. The previous lesson demonstrated how to import and use preexisting modules within your code. This lesson will explore how to create Python modules for organizing and reusing your code effectively.
Python modules are files containing code that can be used within other Python code files. They consist of Python statements and definitions, and allow you to organize code logically into reusable units. Modules help structure larger projects by breaking them into smaller, manageable components. This lesson covers importing Python modules, a process by which code in a module is inserted into another code file.
Python offers a diverse range of built-in exception types like TypeError and ValueError, addressing syntax and runtime errors from language operations and built-in functionalities like file I/O. However, for unique errors within your application, creating custom exceptions in Python enhances code clarity and maintainability, enabling encapsulation of domain-specific error conditions and informative error messaging for users or developers.
As in loops and conditionals, the else clause can be optionally added to a try-except statements as well. The else in try-except Python statements functions to execute a code block when an exception does not occur. Its purpose is to isolate only the code that is prone to causing the handled exception within the try block.
The Python finally clause is an option that can be added to try statement when handling exceptions. This clause allows you to define a code block that must be executed whether an exception occurs or not. It is useful for performing cleanup operations, such as closing a file.
