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python/snippets/cumsum.md

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+---
+title: Partial sum list
+type: snippet
+tags: [list]
+cover: digital-nomad-16
+dateModified: 2021-01-13T23:30:41+02:00
+---
+
+Creates a list of partial sums.
+
+- Use `itertools.accumulate()` to create the accumulated sum for each element.
+- Use `list()` to convert the result into a list.
+
+```py
+from itertools import accumulate
+
+def cumsum(lst):
+  return list(accumulate(lst))
+```
+
+```py
+cumsum(range(0, 15, 3)) # [0, 3, 9, 18, 30]
+```