Fix errors
1/ AttributeError: module 'string' has no attribute 'split' ###replaced string.split(...) by str.split(...)
2/ '<' not supported between instances of 'str' and 'int' ###replaced input(...) by int(input(...))
3/ Error with date format 'start_year, 01,01'.
Fix errors 1/ AttributeError: module 'string' has no attribute 'split' ###replaced string.split(...) by str.split(...) 2/ '<' not supported between instances of 'str' and 'int' ###replaced input(...) by int(input(...)) 3/ Error with date format 'start_year, 01,01'.