按月份和日期分组- python

import datetime

date_obj = datetime.date(2022, 1, 15)
formatted_date = date_obj.strftime("%m-%d")
print(formatted_date)  # 输出：01-15

data = ["2022-01-15", "2022-01-20", "2022-02-05", "2022-02-10", "2022-03-01"]

grouped_data = {}
for date_str in data:
    date_obj = datetime.datetime.strptime(date_str, "%Y-%m-%d")
    month = date_obj.strftime("%m")
    day = date_obj.strftime("%d")
    
    if month not in grouped_data:
        grouped_data[month] = []
    
    grouped_data[month].append(day)

print(grouped_data)

{
    "01": ["15", "20"],
    "02": ["05", "10"],
    "03": ["01"]
}