python solution for problem 25

euler.py

@@ -161,6 +161,14 @@ def euler_24():
     return "".join(map(str, islice(permutations(range(10), 10), 999999, 1000000).next()))
 
 
+def euler_25():
+    """What is the first term in the Fibonacci sequence to contain 1000 digits?"""
+    from itertools import takewhile
+    from eutil import fib
+
+    return len(list(takewhile(lambda x: len(str(x)) < 1000, fib())))
+
+
 def euler_29():
     """How many distinct terms are in the sequence generated by ab for 2 ≤ a ≤ 100 and 2 ≤ b ≤ 100?"""
     m = 101