Beginner LevelPython
How do *args and **kwargs work in Python function definitions?
❓ Interview Prompt: Explain positional variable arguments (*args) and keyword variable arguments (**kwargs), unpacking operators, and parameter ordering.
1. '*args' (Positional Arguments):
Captures an arbitrary number of extra positional arguments passed to a function into a tuple.
2. '**kwargs' (Keyword Arguments):
Captures an arbitrary number of extra keyword arguments into a dictionary.
Parameter Order Rule:
When defining a function, parameters MUST follow this exact order:
1
Standard positional parameters
2
'*args'
3
Keyword-only parameters
4
'**kwargs'
Code Implementation Example
python
def log_event(event_name, *args, level='INFO', **kwargs):
print(f'[{level}] Event: {event_name}')
print('Positional args tuple:', args)
print('Keyword kwargs dict:', kwargs)
log_event('USER_LOGIN', 'user_101', 'ip_127.0.0.1', level='DEBUG', session_id='abc-123')💡Capturing positional and keyword parameters with *args and **kwargs.
🎯 Interview Key Takeaway
Use *args to capture variable positional arguments into a tuple, and **kwargs to capture variable keyword arguments into a dict.
#*args#**kwargs#Functions#Beginner
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