python 获取一年中所有日期

import arrow
date_list = []
for year in [2019, 2020, 2021]:  # 年份
    start_date = '%s-1-1' % year
    a = 0
    if (year % 4 == 0 and year % 100 != 0) or (year % 400 == 0):
        days_sum = 366
    else:
        days_sum = 365
    while a < days_sum:
        b = arrow.get(start_date).shift(days=a).format("YYYY-MM-DD")
        a += 1
        date_list.append(b)
for date in date_list:
    print(date)

日期转换

import time
import datetime


# 当前时间的标准格式
now_time = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
print(now_time)

# 当前时间的时间戳
time_stamp = int(time.time())
print(time_stamp)

# 时间错转标准时间格式
a = 1632300494
b = time.strftime("%Y-%m-%d %H:%M:%S", time.localtime(a))
print(b)

import time

# 将日期格式补全
a = "2010-5-28"
b = time.strftime("%Y-%m-%d", time.strptime(a, "%Y-%m-%d"))
print(b)

# 日期格式转时间戳
c = int(time.mktime(time.strptime(a, "%Y-%m-%d")))
print(c)