title: Converting string 'yyyy-mm-dd' into datetime
body: <p>I have a raw input from the user such as "2015-01-30"...for the query I am using, the date has to be inputed as a string as such "yyyy-mm-dd".</p>
  
  <p>I would like to increment the date by 1 month at end of my loop s.t "2015-01-30" becomes "2015-02-27" (ideally the last business day of the next month). I was hoping someone could help me; I am using PYTHON, the reason I want to convert to datetime is I found a function to add 1 month.</p>
  
  <p>Ideally my two questions to be answered are (in Python):</p>
  
  <p>1) how to convert string "yyyy-mm-dd" into a python datetime and convert back  into string after applying a timedelta function</p>
  
  <p>2) AND/or how to add 1 month to string "yyyy-mm-dd" </p>