How to optimize my code?
I know there is a lot of convertions from one type to another. How to avoid it? Or problem of speed not in convertions?

import sys, re, math
str1 = str(sys.stdin.readlines())
Data = re.findall('\\b\\d+\\b', str1)

for i in reversed (Data):
    print('%.4f' % math.sqrt(float(i)))

Edited by author 19.02.2013 23:58

solution, which worktime is 1.85

import sys, re
from math import sqrt as sq

def find_numbers(f):
    for line in f:
        for word in line.split():
            if word.isdigit():
                yield float(word)

lst = list(find_numbers(sys.stdin))
lst.reverse()
for x in lst:
    print('%.4f' % sq(x))