Python小技 打印月初月末

使用datetime模块打印月初与月末

#!usr/bin/env python3
# -*- coding: UTF-8 -*-
# [email protected]:2020/9/9 10:22
# [email protected]:Puy
# [email protected]:月初月末.py

import datetime

# 单独一个日期的月末

print("第一种方式：-------")
year = 2016  # 年
month = 2  # 月
day = 3  # 日

next_month = datetime.date(year, month, day).replace(day=28) + datetime.timedelta(
    days=4)  # this will never fail
res = next_month - datetime.timedelta(days=next_month.day)
year_month_days = res.strftime('%Y-%m-01')
year_month_daye = res.strftime('%Y-%m-%d')
print("月初:", year_month_days)
print("月末:", year_month_daye)

# 一年的12个月的月末

print("第二种方式：-------")
for month in range(1, 13):
    year = 2016  # 年
    # month = 2  # 月
    day = 3  # 日

    next_month = datetime.date(year, month, day).replace(day=28) + datetime.timedelta(
        days=4)  # this will never fail
    res = next_month - datetime.timedelta(days=next_month.day)
    days = res.strftime('%Y-%m-01')
    daye = res.strftime('%Y-%m-%d')
    print("月初:", days)
    print("月末:", daye)

# 加函数方式调用，制定年的12个月的月末

print("第三种方式：-------")
def month_end(year):
    for month in range(1, 13):
        year =year
        day = 3  # 日
        next_month = datetime.date(year, month, day).replace(day=28) + datetime.timedelta(
            days=4)  # this will never fail
        res = next_month - datetime.timedelta(days=next_month.day)
        days = res.strftime('%Y-%m-01')
        daye = res.strftime('%Y-%m-%d')
        print("月初:", days)
        print("月末:", daye)

month_end(2020)

代码数据显示结果