23 lines
535 B
Markdown
23 lines
535 B
Markdown
---
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title: All indexes of value
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type: snippet
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language: python
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tags: [list]
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cover: purple-flower-bunch
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dateModified: 2020-10-11T13:45:19+03:00
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---
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Returns a list of indexes of all the occurrences of an element in a list.
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- Use `enumerate()` and a list comprehension to check each element for equality with `value` and adding `i` to the result.
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```py
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def index_of_all(lst, value):
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return [i for i, x in enumerate(lst) if x == value]
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```
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```py
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index_of_all([1, 2, 1, 4, 5, 1], 1) # [0, 2, 5]
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index_of_all([1, 2, 3, 4], 6) # []
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```
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