Python模块datetime使用指南

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0. 引入模块

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import datetime

1. 获取当前时间

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now = datetime.datetime.now()
print(now)
today = datetime.date.today()
print('today={today}'.format(today=today))

2. 和字符串的相互转换

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s = now.strftime("%Y-%m-%d %H:%M:%S")
print(s)
s = now.strftime("%Y-%m-%d")
print(s)
date = datetime.datetime.strptime(s, "%Y-%m-%d")
print(date, type(date))

3. 和timestamp相互转换

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timestamp = time.time()
print(timestamp)
dt = datetime.datetime.fromtimestamp(timestamp)
print('dt=%s, type=%s' % (dt, type(dt)))
struct_time = dt.timetuple()
print(struct_time)
timestamp = time.mktime(struct_time)
print(timestamp)
s = time.strftime("%Y-%m-%d %H:%M:%S", struct_time)
print(s)

4. 日期之间的计算

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start_date = datetime.date(2018, 1, 1)
end_date = datetime.date(2018, 3, 1)
delta_date = datetime.timedelta(days=1)
cur = start_date
while cur <= end_date:
    weekday = cur.isoweekday()
    if 1 <= weekday <= 5:
        print(cur.strftime("%Y-%m-%d"))
    cur += delta_date