Create project Euler problem 25 sol2.py (#658)

Author: SandersLin

project_euler/problem_25/sol2.py

@@ -0,0 +1,10 @@
+def fibonacci_genrator():
+	a, b = 0,1
+	while True:
+		a,b = b,a+b
+		yield b
+answer = 1
+gen = fibonacci_genrator()
+while len(str(next(gen))) < 1000:
+	answer += 1
+assert answer+1 == 4782