<human>:  How to derive the week start for a given (iso) weeknumber / year in python
<bot>: Here is some code to derive the week start for the given week number and year ‘2011, 4, 0’

datetime.datetime.strptime('2011, 4, 0', '%Y, %U, %w')

#Warning: this code generation is experimental. Please inspect the code for any bugs before executing.