Example 1: python count repeated elements in a list
# Basic syntax:
dict_of_counts = {item:your_list.count(item) for item in your_list}
# Example usage:
your_list = ["a", "b", "a", "c", "c", "a", "c"]
dict_of_counts = {item:your_list.count(item) for item in your_list}
print(dict_of_counts)
--> {'a': 3, 'b': 1, 'c': 3}
Example 2: python count matching elements in a list
# Basic syntax:
sum(1 for item in your_list if item == "some_condition")
# This counts the items in your_list for which item == "some_condition"
# is true. Of course, this can be changed to any conditional statement
Example 3: how to find no of times a elements in list python
thislist = (1, 3, 7, 8, 7, 5, 4, 6, 8, 5)
x = thislist.count(5)
print(x)
Example 4: python find number of occurrences in list
student_grades = [9.1, 8.8, 10.0, 7.7, 6.8, 8.0, 10.0, 8.1, 10.0, 9.9]
samebnumber = student_grades.count(10.0)
print(samebnumber)
Example 5: count occurrence in array python
arr = np.array( [1, 2, 3, 2, 1, 2])
occ = np.count_nonzero(arr==0)
print(occ)
0
occ = np.count_nonzero(arr==1)
print(occ)
2
Example 6: python count occurrences of an item in a list
>>> [1, 2, 3, 4, 1, 4, 1].count(1)
3