From 2cf33fcefb1dace6ec1d714368c20aaf89656692 Mon Sep 17 00:00:00 2001
From: ptmcg <ptmcg@9bf210a0-9d2d-494c-87cf-cfb32e7dff7b>
Date: Fri, 3 Mar 2017 00:52:59 +0000
Subject: Fix deprecated use of '\' as described in
 https://bugs.python.org/issue27364  (Deprecated in Python 3.6, will become
 SyntaxError in a future release)

git-svn-id: svn://svn.code.sf.net/p/pyparsing/code/trunk@457 9bf210a0-9d2d-494c-87cf-cfb32e7dff7b
---
 src/examples/btpyparse.py           | 6 +++---
 src/examples/invRegex.py            | 4 ++--
 src/examples/pythonGrammarParser.py | 2 +-
 src/examples/verilogParse.py        | 2 +-
 4 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/src/examples/btpyparse.py b/src/examples/btpyparse.py
index 6720c19..4fbbac8 100644
--- a/src/examples/btpyparse.py
+++ b/src/examples/btpyparse.py
@@ -54,16 +54,16 @@ number = Regex('[0-9]+')
 
 # Basis characters (by exclusion) for variable / field names.  The following
 # list of characters is from the btparse documentation
-any_name = Regex('[^\s"#%\'(),={}]+')
+any_name = Regex('[^\\s"#%\'(),={}]+')
 
 # btparse says, and the test bibs show by experiment, that macro and field names
 # cannot start with a digit.  In fact entry type names cannot start with a digit
 # either (see tests/bibs). Cite keys can start with a digit
-not_digname = Regex('[^\d\s"#%\'(),={}][^\s"#%\'(),={}]*')
+not_digname = Regex('[^\\d\\s"#%\'(),={}][^\\s"#%\'(),={}]*')
 
 # Comment comments out to end of line
 comment = (AT + CaselessLiteral('comment') +
-           Regex("[\s{(].*").leaveWhitespace())
+           Regex(r"[\s{(].*").leaveWhitespace())
 
 # The name types with their digiteyness
 not_dig_lower = not_digname.copy().setParseAction(lambda t: t[0].lower())
diff --git a/src/examples/invRegex.py b/src/examples/invRegex.py
index b6fe1f1..aea3b55 100644
--- a/src/examples/invRegex.py
+++ b/src/examples/invRegex.py
@@ -188,9 +188,9 @@ def count(gen):
     return sum(1 for _ in gen)
 
 def invert(regex):
-    """Call this routine as a generator to return all the strings that
+    r"""Call this routine as a generator to return all the strings that
        match the input regular expression.
-           for s in invert("[A-Z]{3}\d{3}"):
+           for s in invert(r"[A-Z]{3}\d{3}"):
                print s
     """
     invReGenerator = GroupEmitter(parser().parseString(regex)).makeGenerator()
diff --git a/src/examples/pythonGrammarParser.py b/src/examples/pythonGrammarParser.py
index f0631b8..f199917 100644
--- a/src/examples/pythonGrammarParser.py
+++ b/src/examples/pythonGrammarParser.py
@@ -9,7 +9,7 @@ from pyparsing import *
 # this just skips that step and inlines the bnf text directly - this grammar was taken from
 # Python 2.4.1
 #
-grammar = """
+grammar = r"""
 # Grammar for Python
 
 # Note:  Changing the grammar specified in this file will most likely
diff --git a/src/examples/verilogParse.py b/src/examples/verilogParse.py
index 2b7fd35..05650df 100644
--- a/src/examples/verilogParse.py
+++ b/src/examples/verilogParse.py
@@ -120,7 +120,7 @@ def Verilog_BNF():
 
         identLead = alphas+"$_"
         identBody = alphanums+"$_"
-        identifier1 = Regex( r"\.?["+identLead+"]["+identBody+"]*(\.["+identLead+"]["+identBody+"]*)*"
+        identifier1 = Regex( r"\.?["+identLead+"]["+identBody+r"]*(\.["+identLead+"]["+identBody+"]*)*"
                             ).setName("baseIdent")
         identifier2 = Regex(r"\\\S+").setParseAction(lambda t:t[0][1:]).setName("escapedIdent")#.setDebug()
         identifier = identifier1 | identifier2
-- 
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