Variable assignment in expressions

Question

Here is my code to generate values in the fibonnacci sequence below 10,000,000.

  3 fibs = [1,1]
  4 while((x = fibs[-1] + fibs[-2]) <= 10000000):
  5             


        

Answer 1

The reason for not allowing assignment in Python expressions is a common, hard-to-find bug in those other languages, caused by this construct.

Please check http://effbot.org/pyfaq/why-can-t-i-use-an-assignment-in-an-expression.htm