How can I pass functions or operators as arguments to a function in Python? -

... while also leaving it executable within the function.

The idea behind this is that I want to make a conference festival that I have so far:

  def summation (n, bound, operation) : If there is no operation and upper! = 'Inf': g = 0 (n, range + 1) for category = num: g + = num return g other: pass   
 but summaries are often for infinite conjugated series Ideally, with the applicable operation for each term, I  print conference (0, 'inf', 1 / factorial (n) for every term (for which I use  'inf' ) ))  I want to be able to write and continuously  E , or  DRF W (X): return conference (1, 'INF', (-N) ** (N-1)) / Factal (N))  to get.  
 The one who comes to my mind is passing the proper arithmetic as a string and then using the  exec  statement to execute it. But I do not think it will complete the whole thing, and it is probably dangerous to use the  exec  with the code entered by the user.  
BlogThis!