python中的与时间相关的模块应用场景分析

import time
# 获取当前时间戳
timestamp = time.time()
print("Current timestamp:", timestamp)
# 将时间戳转换为结构化时间
local_time = time.localtime(timestamp)
print("Local time:", local_time)
# 将结构化时间转换为字符串
formatted_time = time.strftime("%Y-%m-%d %H:%M:%S", local_time)
print("Formatted time:", formatted_time)
# 暂停 2 秒
print("Sleeping for 2 seconds...")
time.sleep(2)
print("Awake!")

from datetime import datetime, timedelta
# 获取当前日期时间
now = datetime.now()
print("Current datetime:", now)
# 格式化日期时间
formatted_date = now.strftime("%Y-%m-%d %H:%M:%S")
print("Formatted datetime:", formatted_date)
# 解析日期时间字符串
parsed_date = datetime.strptime("2024-12-25 10:30:00", "%Y-%m-%d %H:%M:%S")
print("Parsed datetime:", parsed_date)
# 日期时间运算
future_date = now + timedelta(days=7)
print("7 days from now:", future_date)
# 时区处理
from datetime import timezone
utc_now = datetime.now(timezone.utc)
print("UTC now:", utc_now)

import calendar
# 生成 2024 年 12 月的日历
cal = calendar.month(2024, 12)
print("Calendar for December 2024:\n", cal)
# 检查 2024 年是否为闰年
is_leap = calendar.isleap(2024)
print("Is 2024 a leap year?", is_leap)
# 计算 2024 年 12 月的天数
month_range = calendar.monthrange(2024, 12)
print("December 2024 starts on a", calendar.day_name[month_range[0]], "and has", month_range[1], "days.")

import timeit
# 测量列表推导式和普通循环的执行时间
list_comp_time = timeit.timeit('[i for i in range(1000)]', number=10000)
loop_time = timeit.timeit('l = []; for i in range(1000): l.append(i)', number=10000)
print("List comprehension time:", list_comp_time)
print("Loop time:", loop_time)

import pytz
from datetime import datetime
# 获取当前时间并转换为纽约时间
utc_now = datetime.now(pytz.utc)
ny_tz = pytz.timezone('America/New_York')
ny_now = utc_now.astimezone(ny_tz)
print("UTC now:", utc_now)
print("New York now:", ny_now)
# 获取所有可用时区
all_timezones = pytz.all_timezones
print("Available timezones:", all_timezones)

from dateutil import parser, relativedelta
# 解析日期字符串
parsed_date = parser.parse("2024-12-25 10:30:00")
print("Parsed date:", parsed_date)
# 相对日期运算
from datetime import datetime
now = datetime.now()
future_date = now + relativedelta.relativedelta(months=1, days=5)
print("1 month and 5 days from now:", future_date)