[Python] Python - Date parser that could get all the dates from a specific string input

Currently doing a task that has given to me which is partly related to machine learning. The task is to parse a string input from the user into a date, given that I could have 2 parameter for the function: date_from and date_to; something like the given example below.

Any classes/functions that could help or an idea on how to do it would be a big help to me.

2.a 8th of July -> 2018-07-08
2.b July to December -> 2018-07 to 2018-12
2.c July -> 2018-07
2.d July 1st -> 2018-07-01
2.e Last week -> 2018-08-02 (curr_date - 7days)
2.f next week -> 2018-08-16 (curr_date + 7days)
2.g today -> 2018-08-09
2.h tomorrow -> 2018-08-10
2.i next monday -> 2018-08-13
2.j last monday -> 2018-07-30
2.k next month -> 2018-09 (or curr_date + 30days)
2.l last month -> 2018-07 (or curr_date - 30days)


Currently I'm using Flask for the development and testing.

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