Use RawConfigParser instead of SafeConfigParser in PyPIConfig class....

Use RawConfigParser instead of SafeConfigParser in PyPIConfig class. Interpolated values are no longer supported. Since backward compatibility could not be retained in either case, prefer the simpler, more direct format. Ref #442.

CHANGES.txt

@@ -7,9 +7,8 @@ CHANGES
 19.0
 ----
 
-* Issue #442: Use SafeConfigParser for parsing .pypirc file. Now
-  fields containing the percent symbol (%) must have each percent
-  replaced with two percent symbols (%%).
+* Issue #442: Use RawConfigParser for parsing .pypirc file.
+  Interpolated values are no longer honored in .pypirc files.
 
 ------
 18.8.1

setuptools/package_index.py

@@ -945,14 +945,14 @@ class Credential(object):
     def __str__(self):
         return '%(username)s:%(password)s' % vars(self)
 
-class PyPIConfig(configparser.SafeConfigParser):
+class PyPIConfig(configparser.RawConfigParser):
 
     def __init__(self):
         """
         Load from ~/.pypirc
         """
         defaults = dict.fromkeys(['username', 'password', 'repository'], '')
-        configparser.SafeConfigParser.__init__(self, defaults)
+        configparser.RawConfigParser.__init__(self, defaults)
 
         rc = os.path.join(os.path.expanduser('~'), '.pypirc')
         if os.path.exists(rc):

setuptools/tests/test_packageindex.py

@@ -216,7 +216,7 @@ class TestPyPIConfig:
                 [pypi]
                 repository=https://pypi.python.org
                 username=jaraco
-                password=pity%%
+                password=pity%
             """))
         cfg = setuptools.package_index.PyPIConfig()
         cred = cfg.creds_by_repository['https://pypi.python.org']