title: Solver between two dates
body: <p>I'm trying from any date to know what is the date +2 days (excluding weekends).
  For example for the 10/09/2021 it will give me the 14/09/2021 (because I don't take the weekend into account)
  If we are the 08/09/2021 it will give me the 10/09/2021.</p>
  <p>My idea was to do something like this:</p>
  <pre><code>Import QuantLib as ql
  from sympy.solvers import solve
  from sympy import Symbolenter 
  
  calculation_date=ql.Date.todaysDate()
  solve(np.busday(calculation_date,calculation_date+X),2)
  </code></pre>
  <p>Since np.busday returns the number of valid days between two dates.</p>
  <p>But it doesn't work, do you guys have any idea how I can retrieve X?</p>
  <p>Thanks in advance,</p>