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snippets/python/s/cast-list.md

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+---
+title: Cast to list
+type: snippet
+language: python
+tags: [list]
+cover: colorful-pots
+dateModified: 2020-11-02T19:27:07+02:00
+---
+
+Casts the provided value as a list if it's not one.
+
+- Use `isinstance()` to check if the given value is enumerable.
+- Return it by using `list()` or encapsulated in a list accordingly.
+
+```py
+def cast_list(val):
+  return list(val) if isinstance(val, (tuple, list, set, dict)) else [val]
+```
+
+```py
+cast_list('foo') # ['foo']
+cast_list([1]) # [1]
+cast_list(('foo', 'bar')) # ['foo', 'bar']
+```