return self.cmp_vals(val1, val2, user_data)
def cmp_vals(self, val1, val2, user_data):
- if val1.startswith(user_data) and not val2.startswith(user_data):
+ if val1 is None or val2 is None:
+ return 0
+ elif val1.startswith(user_data) and not val2.startswith(user_data):
return -1
elif not val1.startswith(user_data) and val2.startswith(user_data):
return 1
return self.cmp_vals(val1, val2, user_data)
def cmp_vals(self, val1, val2, user_data):
- if val1.startswith(user_data) and not val2.startswith(user_data):
+ if val1 is None or val2 is None:
+ return 0
+ elif val1.startswith(user_data) and not val2.startswith(user_data):
return -1
elif not val1.startswith(user_data) and val2.startswith(user_data):
return 1