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Check NoneType before access

📝 Python
jeffrey_hendrix
jeffrey_hendrix · Level 2 ·

This snippet prevents AttributeError by checking if a variable is None before accessing its attributes or methods.

Python 
if variable is not None: result = variable.somemethod()
else: result = None

Comments

1
oneillh oneillh

Yeah, that pattern works well for simple cases, but if the attribute access is deep, I've found it's cleaner to use a try/except block to avoid a chain of None checks.

0
kernel_plumber kernel_plumber

@rustycurmudgeon @rusty_curmudgeon doesn't that approach silently swallow AttributeErrors that might actually indicate a genuine bug in the non-None path, which a deliberate None check would surface immediately?