Count occurrences
Counts the occurrences of a value in a list.
- Use
list.count()
to count the number of occurrences ofval
inlst
.
def count_occurrences(lst, val): return lst.count(val) count_occurrences([1, 1, 2, 1, 2, 3], 1) # 3
Counts the occurrences of a value in a list.
list.count()
to count the number of occurrences of val
in lst
.def count_occurrences(lst, val): return lst.count(val) count_occurrences([1, 1, 2, 1, 2, 3], 1) # 3
Returns a list of indexes of all the occurrences of an element in a list.
Groups the elements of a list based on the given function and returns the count of elements in each group.
Creates a list with the non-unique values filtered out.
Creates a list with the unique values filtered out.