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Q&A Why are list comprehensions written differently if you use `else`?

It's not a matter of order; Python simply does not directly allow else clauses as part of list comprehensions (docs). When we use [num if num != 11 else 22 for num in hand] We are actually usin...

posted 2y ago by Moshi‭

Answer
#1: Initial revision by user avatar Moshi‭ · 2021-11-18T02:37:33Z (over 2 years ago)
It's not a matter of order; Python simply does not directly allow `else` clauses as part of list comprehensions ([docs](https://docs.python.org/3/reference/expressions.html#displays-for-lists-sets-and-dictionaries)). When we use

```python
[num if num != 11 else 22 for num in hand]
```

We are actually using Python's version of the ternary operator; the `if` and `else` are not part of the list comprehension itself but of the comprehension expression. That is, the above is actually

```python
[(num if num != 11 else 22) for num in hand]
```