我有以下列表“list_example”。我正在尝试计算每种最喜欢的食物被选中的次数。我的真实列表中的某些值可能出现在多个键中，因此它应该只计入“最喜欢的食物”。
输入：
list_example = [{'name':'Tom','favouritefood':'Pizza;Fries;Rice'},
{'name':'Pete','favouritefood':'Pasta;Soup'},
{'name':'Steve','favouritefood':'Chicken;Fries'},
{'name':'Steve','favouritefood':'Rice;Pie;Fries'},
{'name':'Steve','favouritefood':'Chicken,Pizza;Fries'},]
输出：
Count = {'Pizza':2,'Fries':4,'Rice':2,'Soup':1,'Pasta':1,'Pie':1}
import re
list_example = [{'name': 'Tom', 'favouritefood': 'Pizza;Fries;Rice'},
{'name': 'Pete', 'favouritefood': 'Pasta;Soup'},
{'name': 'Steve', 'favouritefood': 'Chicken;Fries'},
{'name': 'Steve', 'favouritefood': 'Rice;Pie;Fries'},
{'name': 'Steve', 'favouritefood': 'Chicken,Pizza;Fries'}, ]
count = {}
for item in list_example:
favourite_food = re.split(';|,', item['favouritefood'])
for food in favourite_food:
try:
count[food] += 1
except KeyError:
count[food] = 1
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