KwickClips Python · 40 sec · free
What are the parts of a list comprehension?
Short answer. Expression, for item, in iterable, then an optional if.
Is the if required?
No, it is optional and filters values.
Four parts
| Part | Example |
|---|---|
| expression | m + 5 |
| for item | for m |
| in iterable | in marks |
| if condition | if m < 33 |
Remember
| [expr for x in data if test] |
| The if part is optional |
A list comprehension reads like English. The expression is the new value. For item names each value. The iterable is what we loop over. The optional if filters. Expression, for, in, then if. The if is optional.
This clip is from the full lesson: List Comprehensions — 6 minutes, with the tables, the quick answers and the whole lesson in text.
Useful for: Programming All levels Python
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