【说站】python中的三种推导式介绍

old_list = [0,1,2,3,4,5]
new_list = []
for item in old_list:
    if item % 2 == 0:
        new_list.append(item)
 
print(new_list)

old_student_score_info = {
    "Jack": {
        "chinese": 87,
        "math": 92,
        "english": 78
    },
    "Tom": {
        "chinese": 92,
        "math": 100,
        "english": 89
    }
}
new_student_score_info = {}
for name, scores in old_student_score_info.items():
    if scores["math"] == 100:
        new_student_score_info.setdefault(name, scores)
print(new_student_score_info)

old_list = [0, 0, 0, 1, 2, 3]
 
new_set = {item for item in old_list}
print(new_set)