如何在 python 中将普通时间戳转换为纪元时间戳

Question

Question 1: Convert the human readable date to epoch timestamp/time as on the start of the day? Example. If the INPUT date is 21-01-2020, print the epoch time at the start of the day ie 12:00 AM Conditions: Date limit: 01-01-1970 to Input Description: The input date will be in any of the following format.

1. dd/mm/yyyy
2. mm/dd/yyyy
3. dd-mm-yyyy
4. mm-dd-yyyy
5. dd.mm.yyyy
6. mm.dd.yyyy
7. ddmmyyyy
8. mmddyyyy

Output Description: For all the types of above input date, the output should be an Epoch timestamp/time.

Question 1 – Date to Epoch timestamp

Exceptions: Any input date other than the given formats must be handled and a message "Unable to convert the provided date" must be printed.

More Examples:

Example 1 Input: 19-01-2020 Output: 1579392000

Example 2 Input: 31122012 Output: 1356912000

Example 3 Input: 251220202 Output: Unable to convert the provided date

Example 4 Input: 17:04:2020 Output: Unable to convert the provided date

Answer 1

from datetime import datetime
import re

my_input = input("Enter date: ")
my_input = re.sub("/", "-", my_input)
my_input = re.sub(".", "-", my_input)

try:
    out = datetime.strptime(my_input, "%d-%m-%Y").timestamp()
except Exception:
    try:
        out = datetime.strptime(my_input, "%d%m%Y").timestamp()
    except Exception:
        out = "Unable to convert the provided date"

print(out)