Aide sur exercice Python

**asm007** · 24/09/2017, 17h12

Bonjour à tous, étant débutant intégral sur Python pouvez-vous m'aider à résoudre ce problème?

If I have an original placement P in an account with a nominal annual interest rate r , after n years, the total amount of extra money I get (the compound interest) is given by:
I=P×((1+r)^^n − 1)

Write a function compound_interest that takes the original placement, the nominal annual interest rate and a number of years as parameters and returns (not print) the compound interest after these number of years.
Use the assert statement and the isinstance function to check that n is a strictly positive integer, P is positive and r is positive.
Make sure there's a docstring attached to the function that specifies that P is the original placement, r is the nominal interest rate ,n is the number of years the compound interest is computed on.

Je vous en serai très reconnaissant

**lulzec** · 24/09/2017, 17h55

Hey,

Je pense qu'il suffit de retourner I. assert vérifie que toutes les conditions soient vérifiées.

Code :

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def compound_interest(n, P, r):
  """ This function returns the total amount of money get after n years with 
  an initial placement P and a rate r. """
  assert r > 0 and n > 0 and P > 0
  return P*((1+r)**n - 1)