将12小时转换为24小时

Question

我试图将时间从12小时转换为24小时......

自动示例时间:

06:35  ## Morning
11:35  ## Morning (If m2 is anywhere between 10:00 and 12:00 (morning to mid-day) during the times of 10:00 and 13:00 (1pm) then the m2 time is a morning time)
1:35  ## Afternoon
11:35  ## Afternoon

示例代码:

m2 = "1:35" ## This is in the afternoon.
m2 = datetime.strptime(m2, "%H:%M")
print m2

预期产出:

13:35

实际产量:

1900-01-01 01:35:00

---

我尝试了第二种变化但又没有帮助:/

m2 = "1:35" ## This is in the afternoon.
m2split = m2.split(":")
if len(m2split[0]) == 1:
    m2 = ("""%s%s%s%s""" % ("0", m2split[0], ":", m2split[1]))
    print m2
m2temp = datetime.strptime(m2, "%I:%M")
m2 = m2temp.strftime("%H:%M")

---

我做错了什么,我该如何解决这个问题？

Answer 1

您需要指定您的意思是PM而不是AM.

>>> from datetime import *
>>> m2 = '1:35 PM'
>>> m2 = datetime.strptime(m2, '%I:%M %p')
>>> print(m2)
1900-01-01 13:35:00

Answer 2

根据https://docs.python.org/2/library/datetime.html#strftime-strptime-behavior,这种方法使用strptime和strftime格式指令,%H是24小时制,%I是12小时制当使用12小时时,%p符合AM或PM的条件.

    >>> from datetime import datetime
    >>> m2 = '1:35 PM'
    >>> in_time = datetime.strptime(m2, "%I:%M %p")
    >>> out_time = datetime.strftime(in_time, "%H:%M")
    >>> print(out_time)
    13:35

Answer 3

试试这个 :)

码:

currenttime = datetime.datetime.now().time().strftime("%H:%M")
if currenttime >= "10:00" and currenttime <= "13:00":
    if m2 >= "10:00" and m2 >= "12:00":
        m2 = ("""%s%s""" % (m2, " AM"))
    else:
        m2 = ("""%s%s""" % (m2, " PM"))
else:
    m2 = ("""%s%s""" % (m2, " PM"))
m2 = datetime.datetime.strptime(m2, '%I:%M %p')
m2 = m2.strftime("%H:%M %p")
m2 = m2[:-3]
print m2

输出:

13:35

Answer 4

如果日期采用这种格式 (HH:MM:SSPM/AM)，则以下代码有效：

a=''
def timeConversion(s):
   if s[-2:] == "AM" :
      if s[:2] == '12':
          a = str('00' + s[2:8])
      else:
          a = s[:-2]
   else:
      if s[:2] == '12':
          a = s[:-2]
      else:
          a = str(int(s[:2]) + 12) + s[2:8]
   return a


s = '11:05:45AM'
result = timeConversion(s)
print(result)