What are the differences between decorators and context managers in Python?
Decorators are functions that modify the behavior of another function, while context managers are used to manage resources.
Can you give me an example of a decorator?
Sure! A simple decorator could be one that logs the execution time of a function. Here's an example:
import time
def time_logger(func):
def wrapper(*args, **kwargs):
start_time = time.time()
result = func(*args, **kwargs)
end_time = time.time()
print(f"{func.__name__} executed in {end_time - start_time} seconds")
return result
return wrapper
And how about a context manager?
A context manager can be created using the with
statement. Here's an example that opens a file:
class FileManager:
def __init__(self, filename):
self.filename = filename
def __enter__(self):
self.file = open(self.filename, 'r')
return self.file
def __exit__(self, exc_type, exc_value, traceback):
self.file.close()
with FileManager('example.txt') as f:
content = f.read()
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