MAINT: Fix deprecated escape sequences in tools/

Fix the escape sequences deprecated in Python 3.6 found in the
tools directory. Note that this does not include the files in
tools/swig/tests which are not even Python 3 compatible at this point.

3 files changed, 8 insertions, 8 deletions

diff --git a/tools/c_coverage/c_coverage_report.py b/tools/c_coverage/c_coverage_report.py
index d9eb49739..327f6dc05 100755
--- a/tools/c_coverage/c_coverage_report.py
+++ b/tools/c_coverage/c_coverage_report.py
@@ -94,7 +94,7 @@ class SourceFiles:
 
     def clean_path(self, path):
         path = path[len(self.prefix):]
-        return re.sub("[^A-Za-z0-9\.]", '_', path)
+        return re.sub(r"[^A-Za-z0-9\.]", '_', path)
 
     def write_text(self, root):
         for path, source in self.files.items():
@@ -121,8 +121,8 @@ class SourceFiles:
 def collect_stats(files, fd, pattern):
     # TODO: Handle compressed callgrind files
     line_regexs = [
-        re.compile("(?P<lineno>[0-9]+)(\s[0-9]+)+"),
-        re.compile("((jump)|(jcnd))=([0-9]+)\s(?P<lineno>[0-9]+)")
+        re.compile(r"(?P<lineno>[0-9]+)(\s[0-9]+)+"),
+        re.compile(r"((jump)|(jcnd))=([0-9]+)\s(?P<lineno>[0-9]+)")
         ]
 
     current_file = None
diff --git a/tools/find_deprecated_escaped_characters.py b/tools/find_deprecated_escaped_characters.py
index 8015d3a42..1c3cc0d38 100644
--- a/tools/find_deprecated_escaped_characters.py
+++ b/tools/find_deprecated_escaped_characters.py
@@ -1,8 +1,8 @@
 #! /usr/bin/env python
-"""
+r"""
 Look for escape sequences deprecated in Python 3.6.
 
-Python 3.6 deprecates a number of non-escape sequences starting with `\` that
+Python 3.6 deprecates a number of non-escape sequences starting with '\' that
 were accepted before. For instance, '\(' was previously accepted but must now
 be written as '\\(' or r'\('.
 
diff --git a/tools/win32build/build.py b/tools/win32build/build.py
index 7ae60fd96..1030aa541 100644
--- a/tools/win32build/build.py
+++ b/tools/win32build/build.py
@@ -16,9 +16,9 @@ import os
 import shutil
 from os.path import join as pjoin, split as psplit, dirname
 
-PYEXECS = {"2.5" : "C:\python25\python.exe",
-        "2.4" : "C:\python24\python24.exe",
-        "2.6" : "C:\python26\python26.exe"}
+PYEXECS = {"2.5" : r"C:\python25\python.exe",
+        "2.4" : r"C:\python24\python24.exe",
+        "2.6" : r"C:\python26\python26.exe"}
 
 _SSE3_CFG = r"""[atlas]
 library_dirs = C:\local\lib\yop\sse3"""