import re
line = "-1 1:-0.294118 2:0.487437 3:0.180328 4:-0.292929 5:-1 6:0.00149028 7:-0.53117 8:-0.0333333"
for match in re.finditer(r"(-?\d\.\d+)", line, re.DOTALL | re.MULTILINE):
print match.group(1)
aW1wb3J0IHJlCmxpbmUgPSAiLTEgMTotMC4yOTQxMTggMjowLjQ4NzQzNyAzOjAuMTgwMzI4IDQ6LTAuMjkyOTI5IDU6LTEgNjowLjAwMTQ5MDI4IDc6LTAuNTMxMTcgODotMC4wMzMzMzMzIgpmb3IgbWF0Y2ggaW4gcmUuZmluZGl0ZXIociIoLT9cZFwuXGQrKSIsIGxpbmUsIHJlLkRPVEFMTCB8IHJlLk1VTFRJTElORSk6CglwcmludCAgbWF0Y2guZ3JvdXAoMSk=