python get function by name
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In Python, it's sometimes necessary to dynamically access a function based on its name. One way to achieve this is by using the globals() function, which returns a dictionary representing the current global symbol table. This tutorial will guide you through the process of getting a function by name using the globals() function with practical examples.
The globals() function in Python provides a dictionary of the current global symbol table. This means you can access variables and functions defined at the global level, including functions defined in the current module. By using this dictionary, you can retrieve a function dynamically based on its name.
Let's start by defining a few simple functions that we'll use in our examples. Create a new Python file or use an interactive environment like Jupyter Notebook.
Now, let's create another Python script where we'll use the globals() function to access functions dynamically.
In this example, we have a get_function_by_name function that takes a function name as an argument and uses globals() to check if the function exists in the global symbol table. If the function is found and is callable, it returns the function; otherwise, it returns None.
Save both scripts, and run main.py. Ensure that you have the functions.py file in the same directory. The output should be:
Feel free to experiment with different function names and parameters to see how the get_function_by_name function dynamically accesses and invokes the specified function.
Using the globals() function in Python allows you to access functions dynamically by name. While this approach can be useful in certain scenarios, it's essential to use it judiciously and consider alternative solutions based on your specific use case.
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