在python中将数字转换为小时

Question

我正在尝试将数字转换为小时格式，如下所示，numbers = [7,12,16,18]预期操作：hours = ["07:00 AM","12:00 PM","04:00 PM","06:00 PM"]有没有办法实现这一目标？

Answer 1

使用标准库：

import datetime

numbers = [7, 12, 16, 18]

hours = [datetime.time(num).strftime("%I:00 %p") for num in numbers]

# ['07:00 AM', '12:00 PM', '04:00 PM', '06:00 PM']

Answer 2

尝试这个：

import datetime

numbers = [7,12,16,18]

hours=[]

for i in numbers:

    if i <= 12:

        time = str(datetime.timedelta(hours=i)) +" AM"

    else:

        time = str(datetime.timedelta(hours=i-12)) + " PM"

    hours.append(time)

print(hours)

输出：

['7:00:00 AM', '12:00:00 PM', '4:00:00 PM', '6:00:00 PM']

Answer 3

不是最干净的方式，但会完成这项工作：

numbers = [7,12,16,18]

hours = []

for n in numbers:

    if n < 12:

        if len(str(n)) == 1:

            temp = "0"+str(n)+":00 AM"

        else:

            temp = str(n)+":00 AM"

    else:

        x = n - 12

        if x == 0:

            temp = "12:00 PM"

        if len(str(x)) == 1:

            temp = "0"+str(x)+":00 PM"

        else:

            temp = str(x)+":00 PM"

    hours.append(temp)

输出：

['07:00 AM', '12:00 PM', '04:00 PM', '06:00 PM']