Python __kwdefaults__

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The __kwdefaults__ attribute in Python is used to retrieve the default values for keyword arguments in a function or method. It provides a dictionary that maps the names of the keyword arguments to their default values.

Example:


  def greet(name, message="Hello"):
      print(f"{message}, {name}!")
      
  print(greet.__kwdefaults__)

In the above example, the function greet has a keyword argument message with a default value of "Hello". By accessing the __kwdefaults__ attribute of the function, we can retrieve the default value as a dictionary:

{'message': 'Hello'}

This shows that the default value for the message keyword argument is "Hello".

It is important to note that the __kwdefaults__ attribute is only available for functions or methods that have keyword arguments with default values. Functions without any keyword arguments or without default values will not have this attribute.

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