Code cleanup and applied pyflakes' suggestions.

doc/calc.py

@@ -2,9 +2,7 @@
 """
 A simple pybison parser program implementing a calculator
 """
-import sys
-
-from bison import BisonParser, BisonNode
+from bison import BisonParser
 
 class Parser(BisonParser):
     """

examples/calc/calc.py

@@ -2,9 +2,7 @@
 """
 A simple pybison parser program implementing a calculator
 """
-import sys
-
-from bison import BisonParser, BisonNode
+from bison import BisonParser
 
 class Parser(BisonParser):
     """

examples/calc/run.py

 #!/usr/bin/env python
 
-import readline
 import sys
 
 sys.path.insert(0, '../../build/lib.linux-x86_64-2.7/')

examples/calc1/calc1.py

@@ -3,9 +3,10 @@
 A more advanced calculator example, with variable storage and scientific
 functions (courtesy of python 'math' module)
 """
-import sys, math, readline
+import math
+
+from bison import BisonParser
 
-from bison import BisonParser, BisonNode, BisonError
 
 class Parser(BisonParser):
     """

examples/java/run.py

@@ -25,7 +25,7 @@ else:
 
 src = "I2PClient.java"
 
-p = myjava.Parser(verbose=verbose)
+p = javaparser.Parser(verbose=verbose)
 
 print "delmebld.py: running parser on HelloWorldApp.java"
 res = p.run(file=src)

examples/template/template.py

@@ -11,7 +11,7 @@ You can do much worse than to copy this file
 somewhere, and tinker away to your heart's content.
 """
 
-import sys, traceback
+import sys
 
 from bison import BisonParser, BisonNode