nosetests, python -

i trying learn python, guide following asking me write simple 'game', utilizing tuples, lists, , classes.

when running 'nosetests' command, following error:

e. ====================================================================== error: tests.lexicon_tests.test_directions ----------------------------------------------------------------------  traceback (most recent call last):   file "/library/python/2.6/site-packages/nose/case.py", line 187, in runtest    self.test(*self.arg)    file "/users/vb/documents/svn/programming/python/projects/lexicon/tests/lexicon_tests.py", line 6, in test_directions    assert_equal(lexicon.scan("north"), [('directions', 'north')]) typeerror: unbound method scan() must called lexicon instance first argument (got str instance instead)  ---------------------------------------------------------------------- ran 2 tests in   0.011s   failed (errors=1) vb mp > ./lexicon.py   > north [(), ('directions', 'north')] vb mp > ./lexicon.py   > north south east [[[(), ('directions', 'north')],  ('directions', 'south')],  ('directions', 'east')] vb mp  

main file:

#!/usr/bin/env python # encoding: utf-8  import sys import os lexicon.game import lexicon   def main():     stuff = raw_input('> ')       lex = lexicon (stuff)      split_array = lex.scan(stuff)     print split_array      #me = lex.tockens(split_array)     #print me  if __name__ == '__main__':     main()  class  #!/usr/bin/env python # encoding: utf-8 """  import sys import os  class lexicon (object):     def __init__(self,data):         self.direction = data         #self.words = data.split()      def scan(self,data):         split_data = data.split()         lex = lexicon (data)          tocken = lex.tockens(split_data)           return tocken      def tockens(self,splitdata):          sentence = splitdata         verbs = ['go','swim','open','punch','fly','stop','kill','eat']         objekts = ['door','bear','face','princess','cabinet']         directions = ['north','south','east','west','down','up','left','right','back']         stopwords = ['the','in','of','from','at','it']           # setep 1, open array          bit = ()         byte = ()         x in sentence:             # step 2, match against verbs             v in verbs:                 try:                     if (x == v):                         bit = ('verb',x)                         byte = [byte, bit]                               except valueerror:                     print "ooops!"             o in objekts:                 try:                     if (x == o):                         bit = ('objekt',x)                         byte = [byte, bit]                 except valueerror:                     print "ooops!"             d in directions:                 try:                     if (x == d):                         bit = ('directions',x)                         byte = [byte, bit]                 except valueerror:                     print "ooops!"             s in stopwords:                 try:                     if (x == s):                         bit = ('stopwords',x)                         byte = [byte, bit]                 except valueerror:                     print "ooops!"          return byte 

test

from nose.tools import * #import lexicon lexicon.game import lexicon  def test_directions():      assert_equal(lexicon.scan("north"), [('directions', 'north')])      result = lexicon.scan("north south east")      assert_equal(result, [('directions', 'north'),                           ('directions', 'south'),                            ('directions', 'east')]) 

thanks!

the way methods called in python object called on passed first argument, , arguments supplied each pushed down 1. when call static method (lexicon.scan) instead of instance method (lex.scan) first argument not supplied.

the method lexicon.scan requires first argument "lexicon" type object, want in test create lexicon object (lex = lexicon(stuff)) , call scan object (lex.scan("north")). is, calling scan("north"), while want call scan(lex, "north").