now using __import__ to make a portable main function, just name a le…

…xer and we can import it yourclass.scanner is preferable

bnflexar.py

@@ -1,7 +1,7 @@
 from lexar import Token, Scanner 
 # we can impliment the grammar parser inside the scanner lexer
 # 3 out of 4 methods are going to be overloaded by the child  does the nested class inheret?
-class BnfLexar(Scanner): #should I subclass this or not
+class Lexer(Scanner): #should I subclass this or not
     def rule(self,match):
         result=match.string.strip('\n',)    
         self.tokenStream.append(Token("nonterminal",result) )

cyk.py

@@ -2,7 +2,7 @@
 import sys
 from lexar import Token
 from grammar import Grammar
-from bnflexar import BnfLexar
+from bnflexar import Lexer
 
 class CYKChart(object):
     def __init__(self):

grammar.py

@@ -1,5 +1,5 @@
 from lexar import Token 
-from bnflexar import BnfLexar
+from bnflexar import Lexer
 
 class Grammar(object):
     """grammar is simply a list of rules with at least one start symbole"""
@@ -21,7 +21,7 @@ def __findbreaks( stack ,i, left):# we need to text this function
                 newrule.rightHand=stack[i:]
                 self.rules.append(newrule)
 
-        lex=BnfLexar()
+        lex=Lexer()
         if verbose:
             lex.setVerbose()
         lex.scanFile(source)

main.py

@@ -2,15 +2,17 @@
 from cyk import CYKChart
 from viz import genDot
 from os import system
-def main(lexarname, gramarspec, inputfile, outputfile=None):
+def main(args**):
+    lexarname, gramarspec, inputfile, outputfile=None
     if outputfile == None:
         outputfile = inputfile
     G = Grammar()
     source = open(gramarspec,'r')
     G.generate(source)
     G.bnf2cnf()
     print "grammer==",G
-    lexer=__import__(lexarname)
+    lexerclass=__import__(lexarname)
+    lexer=lexerclass.Lexer()
     lexer.scan(inputfile)
     S=lexer.getStream()
     print "stream ===",S
@@ -19,9 +21,10 @@ def main(lexarname, gramarspec, inputfile, outputfile=None):
     print C
     print C.graph
     genDot(C,outputfile)
-    system("dot -Tjpg %s  -o %s  "%(outputfile, outputfile))
+    system("dot -Tjpg %s  -o %s "%(outputfile, outputfile))
     print "%s ted"%(outputfile)
 
 if __name__ == '__main__':
     import sys
     main(sys.argv)
+

viz.py

@@ -1,4 +1,4 @@
-from treecyk import CYKChart
+from cyk import CYKChart
 class genDot(object):
 
     def genTree(self,G,here,visited):