Remove unused imports throughout project

Unused imports were discovered using flake8. By removing the unused
imports, the code is a bit friendlier to new contributors as it is
clearer what is being used and not simply leftover from previous
refactoring.

The flake8 command:

$ flake8 . --select F401

http://flake8.pycqa.org/

27 files changed, 46 insertions, 61 deletions

diff --git a/examples/LAparser.py b/examples/LAparser.py
index 8ffe073..3714975 100644
--- a/examples/LAparser.py
+++ b/examples/LAparser.py
@@ -57,11 +57,10 @@ Usage: To process LA equations embedded in source files, import this module and
 

 """

 

-import re,os,sys

+import re,sys

 from pyparsing import Word, alphas, ParseException, Literal, CaselessLiteral \

-, Combine, Optional, nums, Or, Forward, OneOrMore, ZeroOrMore, \

-  FollowedBy, StringStart, StringEnd, alphanums

-import math

+, Combine, Optional, nums, Forward, ZeroOrMore, \

+  StringEnd, alphanums

 

 # Debugging flag can be set to either "debug_flag=True" or "debug_flag=False"

 debug_flag=False

diff --git a/examples/antlr_grammar.py b/examples/antlr_grammar.py
index 7863a77..e25ff7f 100644
--- a/examples/antlr_grammar.py
+++ b/examples/antlr_grammar.py
@@ -10,7 +10,7 @@ Submitted by Luca DallOlio, September, 2010
 '''

 from pyparsing import Word, ZeroOrMore, printables, Suppress, OneOrMore, Group, \

     LineEnd, Optional, White, originalTextFor, hexnums, nums, Combine, Literal, Keyword, \

-    cStyleComment, Regex, Forward, MatchFirst, And, srange, oneOf, alphas, alphanums, \

+    cStyleComment, Regex, Forward, MatchFirst, And, oneOf, alphas, alphanums, \

     delimitedList

 

 # http://www.antlr.org/grammar/ANTLR/ANTLRv3.g

diff --git a/examples/dfmparse.py b/examples/dfmparse.py
index 28a3a9b..d77a7ff 100644
--- a/examples/dfmparse.py
+++ b/examples/dfmparse.py
@@ -10,7 +10,7 @@ __author__ = "Daniel 'Dang' Griffith <pythondev - dang at lazytwinacres . net>"
 

 from pyparsing import Literal, CaselessLiteral, Word, delimitedList \

     , Optional, Combine, Group, alphas, nums, alphanums, Forward \

-    , oneOf, sglQuotedString, OneOrMore, ZeroOrMore, CharsNotIn

+    , oneOf, OneOrMore, ZeroOrMore, CharsNotIn

 

 

 # This converts DFM character constants into Python string (unicode) values.

diff --git a/examples/dictExample2.py b/examples/dictExample2.py
index 0f243d3..58162f7 100644
--- a/examples/dictExample2.py
+++ b/examples/dictExample2.py
@@ -7,7 +7,6 @@
 # Copyright (c) 2004, Paul McGuire

 #

 from pyparsing import Literal, Word, Group, Dict, ZeroOrMore, alphas, nums, delimitedList, pyparsing_common

-import pprint

 

 testData = """

 +-------+------+------+------+------+------+------+------+------+

diff --git a/examples/excelExpr.py b/examples/excelExpr.py
index 913d65b..57a3f90 100644
--- a/examples/excelExpr.py
+++ b/examples/excelExpr.py
@@ -5,7 +5,7 @@
 # A partial implementation of a parser of Excel formula expressions.

 #

 from pyparsing import (CaselessKeyword, Suppress, Word, alphas,

-    alphanums, nums, Optional, Group, oneOf, Forward, Regex,

+    alphanums, nums, Optional, Group, oneOf, Forward,

     infixNotation, opAssoc, dblQuotedString, delimitedList,

     Combine, Literal, QuotedString, ParserElement, pyparsing_common)

 ParserElement.enablePackrat()

diff --git a/examples/fourFn.py b/examples/fourFn.py
index 484aa45..e1393b6 100644
--- a/examples/fourFn.py
+++ b/examples/fourFn.py
@@ -9,8 +9,8 @@
 #

 # Copyright 2003-2009 by Paul McGuire

 #

-from pyparsing import Literal,CaselessLiteral,Word,Group,Optional,\

-    ZeroOrMore,Forward,nums,alphas,alphanums,Regex,ParseException,\

+from pyparsing import Literal,Word,Group,\

+    ZeroOrMore,Forward,alphas,alphanums,Regex,ParseException,\

     CaselessKeyword, Suppress

 import math

 import operator

diff --git a/examples/getNTPserversNew.py b/examples/getNTPserversNew.py
index 6eb653b..6bad555 100644
--- a/examples/getNTPserversNew.py
+++ b/examples/getNTPserversNew.py
@@ -6,7 +6,7 @@
 # Copyright 2004-2010, by Paul McGuire

 # September, 2010 - updated to more current use of setResultsName, new NIST URL

 #

-from pyparsing import (Word, Combine, Suppress, SkipTo, nums, makeHTMLTags,

+from pyparsing import (Word, Combine, SkipTo, nums, makeHTMLTags,

                         delimitedList, alphas, alphanums)

 try:

     import urllib.request

diff --git a/examples/idlParse.py b/examples/idlParse.py
index 37cb363..1daaf24 100644
--- a/examples/idlParse.py
+++ b/examples/idlParse.py
@@ -6,9 +6,9 @@
 # Copyright (c) 2003, Paul McGuire

 #

 

-from pyparsing import Literal, CaselessLiteral, Word, OneOrMore, ZeroOrMore, \

-        Forward, NotAny, delimitedList, oneOf, Group, Optional, Combine, alphas, nums, restOfLine, cStyleComment, \

-        alphanums, printables, empty, quotedString, ParseException, ParseResults, Keyword, Regex

+from pyparsing import Literal, Word, OneOrMore, ZeroOrMore, \

+        Forward, delimitedList, Group, Optional, alphas, restOfLine, cStyleComment, \

+        alphanums, quotedString, ParseException, Keyword, Regex

 import pprint

 #~ import tree2image

 

diff --git a/examples/lucene_grammar.py b/examples/lucene_grammar.py
index fc104e0..0cd7e0d 100644
--- a/examples/lucene_grammar.py
+++ b/examples/lucene_grammar.py
@@ -8,7 +8,7 @@
 #

 

 from pyparsing import (Literal, CaselessKeyword, Forward, Regex, QuotedString, Suppress,

-    Optional, Group, FollowedBy, infixNotation, opAssoc, ParseException, ParserElement,

+    Optional, Group, infixNotation, opAssoc, ParserElement,

     pyparsing_common)

 ParserElement.enablePackrat()

 

diff --git a/examples/mozillaCalendarParser.py b/examples/mozillaCalendarParser.py
index 210f284..2633eb8 100644
--- a/examples/mozillaCalendarParser.py
+++ b/examples/mozillaCalendarParser.py
@@ -1,4 +1,4 @@
-from pyparsing import Optional, oneOf, Dict, Literal, Word, printables, Group, OneOrMore, ZeroOrMore
+from pyparsing import Optional, oneOf, Literal, Word, printables, Group, OneOrMore, ZeroOrMore
 
 """
 A simple parser for calendar (*.ics) files,
diff --git a/examples/nested.py b/examples/nested.py
index 7a0f803..2e71d62 100644
--- a/examples/nested.py
+++ b/examples/nested.py
@@ -7,7 +7,6 @@
 #

 

 from pyparsing import *

-import pprint

 

 data = """

 {

diff --git a/examples/parseTabularData.py b/examples/parseTabularData.py
index 5aa6f09..da19033 100644
--- a/examples/parseTabularData.py
+++ b/examples/parseTabularData.py
@@ -7,7 +7,7 @@
 #

 # Copyright 2015, Paul McGuire

 #

-from pyparsing import col,Word,Optional,alphas,nums,ParseException

+from pyparsing import col,Word,Optional,alphas,nums

 

 table = """\

          1         2

diff --git a/examples/pgn.py b/examples/pgn.py
index d13f83e..fc19c98 100644
--- a/examples/pgn.py
+++ b/examples/pgn.py
@@ -10,7 +10,7 @@
 # Copyright 2004, by Alberto Santini http://www.albertosantini.it/chess/

 #

 from pyparsing import alphanums, nums, quotedString

-from pyparsing import Combine, Forward, Group, Literal, oneOf, OneOrMore, Optional, Suppress, ZeroOrMore, White, Word

+from pyparsing import Combine, Forward, Group, Literal, oneOf, OneOrMore, Optional, Suppress, ZeroOrMore, Word

 from pyparsing import ParseException

 

 #

diff --git a/examples/protobuf_parser.py b/examples/protobuf_parser.py
index 9be2c7e..ad5db3a 100644
--- a/examples/protobuf_parser.py
+++ b/examples/protobuf_parser.py
@@ -6,7 +6,7 @@
 #

 

 from pyparsing import (Word, alphas, alphanums, Regex, Suppress, Forward,

-    Group, oneOf, ZeroOrMore, Optional, delimitedList, Keyword,

+    Group, oneOf, ZeroOrMore, Optional, delimitedList,

     restOfLine, quotedString, Dict)

 

 ident = Word(alphas+"_",alphanums+"_").setName("identifier")

diff --git a/examples/pymicko.py b/examples/pymicko.py
index e0fe205..d3df6f5 100644
--- a/examples/pymicko.py
+++ b/examples/pymicko.py
@@ -18,7 +18,7 @@
 #    A copy of the GNU General Public License can be found at <http://www.gnu.org/licenses/>.

 

 from pyparsing import *

-from sys import stdin, stdout, stderr, argv, exit

+from sys import stdin, argv, exit

 

 #defines debug level

 # 0 - no debug

diff --git a/examples/rangeCheck.py b/examples/rangeCheck.py
index 219defa..66af545 100644
--- a/examples/rangeCheck.py
+++ b/examples/rangeCheck.py
@@ -8,7 +8,7 @@
 # Copyright 2011,2015 Paul T. McGuire

 #

 

-from pyparsing import Word, nums, Suppress, ParseException, empty, Optional

+from pyparsing import Word, nums, Suppress, Optional

 from datetime import datetime

 

 def ranged_value(expr, minval=None, maxval=None):

diff --git a/examples/searchparser.py b/examples/searchparser.py
index d645a1f..1744448 100644
--- a/examples/searchparser.py
+++ b/examples/searchparser.py
@@ -57,7 +57,7 @@ TODO:
 - ask someone to check my English texts

 - add more kinds of wildcards ('*' at the beginning and '*' inside a word)?

 """

-from pyparsing import Word, alphanums, Keyword, Group, Combine, Forward, Suppress, Optional, OneOrMore, oneOf

+from pyparsing import Word, alphanums, Keyword, Group, Combine, Forward, Suppress, OneOrMore, oneOf

 

 class SearchQueryParser:

 

diff --git a/examples/simpleSQL.py b/examples/simpleSQL.py
index 18e93a0..c64a022 100644
--- a/examples/simpleSQL.py
+++ b/examples/simpleSQL.py
@@ -5,8 +5,8 @@
 #

 # Copyright (c) 2003,2016, Paul McGuire

 #

-from pyparsing import Literal, CaselessLiteral, Word, delimitedList, Optional, \

-    Combine, Group, alphas, nums, alphanums, ParseException, Forward, oneOf, quotedString, \

+from pyparsing import Word, delimitedList, Optional, \

+    Group, alphas, alphanums, Forward, oneOf, quotedString, \

     ZeroOrMore, restOfLine, CaselessKeyword, pyparsing_common

 

 # define SQL tokens

diff --git a/examples/sparser.py b/examples/sparser.py
index 68d8a52..a7027eb 100644
--- a/examples/sparser.py
+++ b/examples/sparser.py
@@ -47,8 +47,6 @@ EXAMPLES:
 import sys

 import os

 import getopt

-import re

-import gzip

 

 from pyparsing import *

 

diff --git a/examples/sql2dot.py b/examples/sql2dot.py
index aa86c40..fa1d489 100644
--- a/examples/sql2dot.py
+++ b/examples/sql2dot.py
@@ -47,9 +47,9 @@ alter table only student_registrations
     (class_id) references classes(class_id);

 """.upper()

 

-from pyparsing import Literal, CaselessLiteral, Word, delimitedList \

-    ,Optional, Combine, Group, alphas, nums, alphanums, Forward \

-    , oneOf, sglQuotedString, OneOrMore, ZeroOrMore, CharsNotIn \

+from pyparsing import Literal, Word, delimitedList \

+    , alphas, alphanums \

+    , OneOrMore, ZeroOrMore, CharsNotIn \

     , replaceWith

 

 skobki = "(" + ZeroOrMore(CharsNotIn(")")) + ")"

diff --git a/examples/stackish.py b/examples/stackish.py
index 3fa98f4..d33d4de 100644
--- a/examples/stackish.py
+++ b/examples/stackish.py
@@ -29,7 +29,7 @@ SPACE White space is basically ignored. This is interesting because since
 """

 

 from pyparsing import Suppress,Word,nums,alphas,alphanums,Combine,oneOf,\

-        Optional,QuotedString,Forward,Group,ZeroOrMore,printables,srange

+        Optional,QuotedString,Forward,Group,ZeroOrMore,srange

 

 MARK,UNMARK,AT,COLON,QUOTE = map(Suppress,"[]@:'")

 

diff --git a/examples/stateMachine2.py b/examples/stateMachine2.py
index 21e0545..a156f6c 100644
--- a/examples/stateMachine2.py
+++ b/examples/stateMachine2.py
@@ -2,7 +2,6 @@
 #

 # module to define .pystate import handler

 #

-#import imputil

 import sys

 import os

 import types

@@ -10,11 +9,9 @@ import urllib.parse
 

 DEBUG = False

 

-from pyparsing import Word, Group, ZeroOrMore, alphas, \

-    alphanums, ParserElement, ParseException, ParseSyntaxException, \

-    Empty, LineEnd, OneOrMore, col, Keyword, pythonStyleComment, \

-    StringEnd, traceParseAction

-

+from pyparsing import Word, Group, alphas, \

+    alphanums, ParseException, \

+    OneOrMore, col, Keyword, pythonStyleComment

 

 ident = Word(alphas+"_", alphanums+"_$")

 

diff --git a/examples/test_bibparse.py b/examples/test_bibparse.py
index 78f5bb7..48ec64e 100644
--- a/examples/test_bibparse.py
+++ b/examples/test_bibparse.py
@@ -1,12 +1,10 @@
 """ Test for bibparse grammar """

 

-from os.path import join as pjoin, dirname

-

 from pyparsing import ParseException

 from .btpyparse import Macro

 from . import btpyparse as bp

 

-from nose.tools import assert_true, assert_false, assert_equal, assert_raises

+from nose.tools import assert_equal, assert_raises

 

 

 def test_names():

diff --git a/examples/urlExtractorNew.py b/examples/urlExtractorNew.py
index e258408..79f22ab 100644
--- a/examples/urlExtractorNew.py
+++ b/examples/urlExtractorNew.py
@@ -1,7 +1,6 @@
 # URL extractor

 # Copyright 2004, Paul McGuire

-from pyparsing import Literal,Suppress,CharsNotIn,CaselessLiteral,\

-        Word,dblQuotedString,alphanums,SkipTo,makeHTMLTags

+from pyparsing import SkipTo, makeHTMLTags

 import urllib.request, urllib.parse, urllib.error

 import pprint

 

diff --git a/examples/verilogParse.py b/examples/verilogParse.py
index 0c63f19..9477e38 100644
--- a/examples/verilogParse.py
+++ b/examples/verilogParse.py
@@ -61,17 +61,16 @@
 #           for udpInstance.

 #   1.0.11 - Fixed bug in inst_args, content alternatives were reversed

 #

-import pdb

 import time

 import pprint

 import sys

 

 __version__ = "1.0.11"

 

-from pyparsing import Literal, CaselessLiteral, Keyword, Word, OneOrMore, ZeroOrMore, \

-        Forward, NotAny, delimitedList, Group, Optional, Combine, alphas, nums, restOfLine, cStyleComment, \

-        alphanums, printables, dblQuotedString, empty, ParseException, ParseResults, MatchFirst, oneOf, GoToColumn, \

-        ParseResults,StringEnd, FollowedBy, ParserElement, And, Regex, cppStyleComment#,__version__

+from pyparsing import Literal, Keyword, Word, OneOrMore, ZeroOrMore, \

+        Forward, delimitedList, Group, Optional, Combine, alphas, nums, restOfLine, \

+        alphanums, dblQuotedString, empty, ParseException, oneOf, \

+        StringEnd, FollowedBy, ParserElement, Regex, cppStyleComment

 import pyparsing

 usePackrat = False

 usePsyco = False

diff --git a/pyparsing.py b/pyparsing.py
index 44773be..aa1b993 100644
--- a/pyparsing.py
+++ b/pyparsing.py
@@ -109,7 +109,7 @@ import pprint
 import traceback
 import types
 from datetime import datetime
-from itertools import takewhile
+
 try:
     # Python 3
     from itertools import filterfalse
diff --git a/unitTests.py b/unitTests.py
index fa7c0e5..7dcc237 100644
--- a/unitTests.py
+++ b/unitTests.py
@@ -13,7 +13,6 @@ from pyparsing import ParseException
 import pyparsing as pp

 

 import sys

-import pdb

 

 PY_3 = sys.version.startswith('3')

 if PY_3:

@@ -273,7 +272,6 @@ class ParseJSONDataTest(ParseTestCase):
             [],

             ]

 

-        import pprint

         for t,exp in zip((test1,test2,test3,test4,test5),expected):

             result = jsonObject.parseString(t)

 ##            print result.dump()

@@ -285,7 +283,6 @@ class ParseJSONDataTest(ParseTestCase):
 class ParseCommaSeparatedValuesTest(ParseTestCase):

     def runTest(self):

         from pyparsing import commaSeparatedList

-        import string

 

         testData = [

             "a,b,c,100.2,,3",

@@ -316,7 +313,7 @@ class ParseCommaSeparatedValuesTest(ParseTestCase):
 class ParseEBNFTest(ParseTestCase):

     def runTest(self):

         from examples import ebnf

-        from pyparsing import Word, quotedString, alphas, nums,ParserElement

+        from pyparsing import Word, quotedString, alphas, nums

 

         print_('Constructing EBNF parser with pyparsing...')

 

@@ -989,7 +986,7 @@ class ReStringRangeTest(ParseTestCase):
 class SkipToParserTests(ParseTestCase):

     def runTest(self):

 

-        from pyparsing import Literal, SkipTo, NotAny, cStyleComment, ParseBaseException

+        from pyparsing import Literal, SkipTo, cStyleComment, ParseBaseException

 

         thingToFind = Literal('working')

         testExpr = SkipTo(Literal(';'), include=True, ignore=cStyleComment) + thingToFind

@@ -1068,7 +1065,7 @@ class CustomQuotesTest(ParseTestCase):
 

 class RepeaterTest(ParseTestCase):

     def runTest(self):

-        from pyparsing import matchPreviousLiteral,matchPreviousExpr, Forward, Literal, Word, alphas, nums, ParserElement

+        from pyparsing import matchPreviousLiteral,matchPreviousExpr, Word, nums, ParserElement

 

         if ParserElement._packratEnabled:

             print_("skipping this test, not compatible with packratting")

@@ -1406,7 +1403,7 @@ class InfixNotationGrammarTest4(ParseTestCase):
 class InfixNotationGrammarTest5(ParseTestCase):

 

     def runTest(self):

-        from pyparsing import infixNotation, opAssoc, pyparsing_common, Literal, oneOf, ParseResults

+        from pyparsing import infixNotation, opAssoc, pyparsing_common, Literal, oneOf

 

         expop = Literal('**')

         signop = oneOf('+ -')

@@ -2267,7 +2264,7 @@ class OriginalTextForTest(ParseTestCase):
 

 class PackratParsingCacheCopyTest(ParseTestCase):

     def runTest(self):

-        from pyparsing import Word,nums,ParserElement,delimitedList,Literal,Optional,alphas,alphanums,ZeroOrMore,empty

+        from pyparsing import Word,nums,delimitedList,Literal,Optional,alphas,alphanums,ZeroOrMore,empty

 

         integer = Word(nums).setName("integer")

         id = Word(alphas+'_',alphanums+'_')

@@ -2288,7 +2285,7 @@ class PackratParsingCacheCopyTest(ParseTestCase):
 

 class PackratParsingCacheCopyTest2(ParseTestCase):

     def runTest(self):

-        from pyparsing import Keyword,Word,Suppress,Forward,Optional,delimitedList,ParserElement,Group

+        from pyparsing import Keyword,Word,Suppress,Forward,Optional,delimitedList,Group

 

         DO,AA = list(map(Keyword, "DO AA".split()))

         LPAR,RPAR = list(map(Suppress,"()"))

@@ -2639,7 +2636,7 @@ class OptionalEachTest(ParseTestCase):
                          + str(p1res.asList()) + " should match " + str(p2res.asList()))

 

     def runTest2(self):

-        from pyparsing import Word, alphanums, Suppress, OneOrMore, Group, Regex, Optional

+        from pyparsing import Word, alphanums, OneOrMore, Group, Regex, Optional

 

         word = Word(alphanums + '_').setName("word")

         with_stmt = 'with' + OneOrMore(Group(word('key') + '=' + word('value')))('overrides')

@@ -2736,7 +2733,7 @@ class MarkInputLineTest(ParseTestCase):
 

         samplestr1 = "DOB 100-10-2010;more garbage\nID PARI12345678;more garbage"

 

-        from pyparsing import Regex, Word, alphanums, restOfLine

+        from pyparsing import Regex

         dob_ref = "DOB" + Regex(r"\d{2}-\d{2}-\d{4}")("dob")

 

         try:

@@ -2754,7 +2751,7 @@ class LocatedExprTest(ParseTestCase):
         #             012345678901234567890123456789012345678901234567890

         samplestr1 = "DOB 10-10-2010;more garbage;ID PARI12345678  ;more garbage"

 

-        from pyparsing import Regex, Word, alphanums, restOfLine, locatedExpr

+        from pyparsing import Word, alphanums, locatedExpr

         id_ref = locatedExpr("ID" + Word(alphanums,exact=12)("id"))

 

         res = id_ref.searchString(samplestr1)[0][0]

@@ -2802,7 +2799,7 @@ class PopTest(ParseTestCase):
 

 class AddConditionTest(ParseTestCase):

     def runTest(self):

-        from pyparsing import Word, alphas, nums, Suppress, ParseFatalException

+        from pyparsing import Word, nums, Suppress, ParseFatalException

 

         numParser = Word(nums)

         numParser.addParseAction(lambda s,l,t: int(t[0]))