########### end pywallet functions #######################
-
-from ecdsa.ecdsa import curve_secp256k1, generator_secp256k1
+try:
+ from ecdsa.ecdsa import curve_secp256k1, generator_secp256k1
+except:
+ print "cannot import ecdsa.curve_secp256k1. You probably need to upgrade ecdsa.\nTry: sudo pip install --upgrade ecdsa"
+ exit()
from ecdsa.curves import SECP256k1
from ecdsa.util import string_to_number, number_to_string