[Python] How to avoid repeated checks for an optional callback in a Python for loop?

Let’s say I have a function download() that takes an optional on_progress callback. Inside the function, I iterate over some data and call on_progress(i) if the callback is provided. My current implementation looks like this:

def download(on_progress: Callable | None):
data = requests.get(“exampleurl.com”)
for i in data.iter_content():
if on_progress:
on_progress(i)


However, the if on_progress check inside the loop feels inefficient and repetitive. Is there a more Pythonic way to avoid this check on every iteration while still allowing the on_progress callback to be optional?

Let me know if you want me to add extra details like performance concerns or specific use cases!

Continue reading...