removed confusing characters from possible password characters

helios/models.py

@@ -925,7 +925,7 @@ class Voter(HeliosModel):
     if self.voter_password:
       raise Exception("password already exists")
     
-    self.voter_password = heliosutils.random_string(length)
+    self.voter_password = heliosutils.random_string(length, alphabet='abcdefghijkmnopqrstuvwxyzABCDEFGHIJKLMNPQRSTUVWXYZ23456789')
 
   def store_vote(self, cast_vote):
     # only store the vote if it's cast later than the current one

helios/utils.py

@@ -119,9 +119,9 @@ def xss_strip_all_tags(s):
  
 random.seed()
 
-def random_string(length=20):
+def random_string(length=20, alphabet=None):
     random.seed()
-    ALPHABET = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'
+    ALPHABET = alphabet or 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'
     r_string = ''
     for i in range(length):
         r_string += random.choice(ALPHABET)