Use raw strings for regexes

setuptools/package_index.py

@@ -29,11 +29,11 @@ from setuptools.wheel import Wheel
 __metaclass__ = type
 
 EGG_FRAGMENT = re.compile(r'^egg=([-A-Za-z0-9_.+!]+)$')
-HREF = re.compile("""href\\s*=\\s*['"]?([^'"> ]+)""", re.I)
+HREF = re.compile(r"""href\s*=\s*['"]?([^'"> ]+)""", re.I)
 # this is here to fix emacs' cruddy broken syntax highlighting
 PYPI_MD5 = re.compile(
-    '<a href="([^"#]+)">([^<]+)</a>\n\\s+\\(<a (?:title="MD5 hash"\n\\s+)'
-    'href="[^?]+\\?:action=show_md5&amp;digest=([0-9a-f]{32})">md5</a>\\)'
+    r'<a href="([^"#]+)">([^<]+)</a>\n\s+\(<a (?:title="MD5 hash"\n\s+)'
+    r'href="[^?]+\?:action=show_md5&amp;digest=([0-9a-f]{32})">md5</a>\)'
 )
 URL_SCHEME = re.compile('([-+.a-z0-9]{2,}):', re.I).match
 EXTENSIONS = ".tar.gz .tar.bz2 .tar .zip .tgz".split()