Why you should avoid wildcard imports python tips
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wildcard imports in python, such as `from module import *`, allow you to import all names defined in a module into the current namespace. while this may seem convenient, it is generally considered a bad practice for several reasons:
1. **namespace pollution**: wildcard imports bring all names from a module into your current namespace. this can lead to naming conflicts and make your code harder to read and maintain.
2. **readability**: when you use wildcard imports, it becomes unclear where a particular function or class is defined. this can make it challenging for others (or even yourself in the future) to understand the origin of the code.
3. **explicit is better than implicit**: python's philosophy emphasizes readability and explicitness. using wildcard imports goes against this principle by making it unclear which specific names are being imported.
4. **performance**: wildcard imports can negatively impact the performance of your code. when you import everything from a module, python has to load and parse more code, which can slow down your program.
instead of using wildcard imports, it is recommended to import specific names or modules that you need. this makes your code more readable, reduces the risk of naming conflicts, and improves performance.
here is an example of how to import specific names from a module instead of using a wildcard import:
in this example, we import only the `sqrt` and `pi` functions from the `math` module, making it clear which names are being imported and used in the code. this approach is considered more pythonic and helps in writing clean and maintainable code.
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