1. use count() function （ The string \ list \ Count tuples ）
list_japan = [1,2,3,4,5,4,3,5,2,2]
for i in set(list_japan):
#count Function the number of times a character appears in the list
print(f"{
i} appear {
list_japan.count(i)} Time ")
2. use Counter class （ The string \ list \ Tuples \ The dictionary counts ）
list_japan = [1,2,3,4,5,4,3,5,2,2]
from collections import Counter
# The string \ list \ Yuan Zu \ The dictionary counts , Returns data of a dictionary type , Keys are elements , The value is the number of times the element appears
print(Counter(list_japan))
python The same key is not allowed to appear twice in the dictionary . When creating, if the same key is assigned twice , The latter value will be remembered
3. Count with double-layer cycle
list_japan =[1,4,2,4,2,2,5,2,6,3,3,6,3,6,6,3,3,3,7,8,9,8,7,0,7,1,2,4,7,8,9]
dicc = {
}
count = 0
for i in set(list_japan):
for j in list_japan:
if i==j:
count+=1
dicc[i]=count
count=0
print(dicc)
