pass No-op
Last updated: 2026-09-22
pass No-op
pass is a no-op used as a placeholder where a statement is syntactically required.
| Category | Keywords & Statements |
|---|---|
| Kind | Keyword / Statement |
| Python Version | all |
📝 Syntax
pass▶ Example
Edit the code, press Run, and see the result in the output panel:
Output：
ok💡 Related Cases
More case studies coming soon — check back later.
❓ FAQ
QWhy does a function body containing only comments raise an error?
ABecause a function body must contain at least one statement; comments alone do not count as statements. Write a `pass` placeholder and the function is defined fine.
QAre `pass` and `return None` the same?
ANo. `pass` is just a placeholder and the function continues to run; `return None` (or a bare `return`) immediately ends the function and returns `None`.
QWhen should you use `pass`?
AFor empty classes, empty functions, not-yet-implemented exception branches, or wherever syntax requires a statement but you do not want to do anything yet. `pass` is more honest than filling in useless code.
