Drop support for Python < 3.5

.github/workflows/python-test.yml

@@ -20,7 +20,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install pytest coverage pytest-cov six mock
+          pip install pytest coverage pytest-cov
           if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
           pip install -e .
       - name: Test with pytest
@@ -35,7 +35,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [ "2.7", "3.5", "3.6" ]
+        python-version: [ "3.5", "3.6" ]
 
     steps:
       - uses: actions/checkout@v3
@@ -46,7 +46,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install pytest coverage pytest-cov six mock
+          pip install pytest coverage pytest-cov
           if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
           pip install -e .
       - name: Test with pytest

README.md

@@ -7,7 +7,6 @@
 Python 3+ compatible port of the [configobj](https://pypi.python.org/pypi/configobj/) library.
 
 The Github CI/CD Pipeline runs tests on python versions:
-- 2.7
 - 3.5
 - 3.6
 - 3.7

setup.py

@@ -40,10 +40,6 @@
 DESCRIPTION = 'Config file reading, writing and validation.'
 URL = 'https://github.com/DiffSK/configobj'
 
-REQUIRES = """
-    six
-"""
-
 VERSION = ''
 with closing(open(os.path.join(__here__, 'src', PACKAGES[0], '_version.py'), 'r')) as handle:
     for line in handle.readlines():
@@ -88,8 +84,6 @@
     'Intended Audience :: Developers',
     'License :: OSI Approved :: BSD License',
     'Programming Language :: Python',
-    'Programming Language :: Python :: 2',
-    'Programming Language :: Python :: 2.7',
     'Programming Language :: Python :: 3',
     'Programming Language :: Python :: 3.5',
     'Programming Language :: Python :: 3.6',
@@ -120,12 +114,11 @@
     py_modules=MODULES,
     package_dir={'': 'src'},
     packages=PACKAGES,
-    install_requires=[i.strip() for i in REQUIRES.splitlines() if i.strip()],
-    python_requires='>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*',
+    python_requires='>=3.5',
     classifiers=CLASSIFIERS,
     keywords=KEYWORDS,
     license='BSD (2 clause)',
 )
 
 if __name__ == '__main__':
-    setup(**project)
+    setup(**project)

src/configobj/__init__.py

@@ -19,7 +19,6 @@
 
 from codecs import BOM_UTF8, BOM_UTF16, BOM_UTF16_BE, BOM_UTF16_LE
 
-import six
 from ._version import __version__
 
 # imported lazily to avoid startup performance hit if it isn't used
@@ -121,10 +120,6 @@ def match_utf8(encoding):
     'write_empty_values': False,
 }
 
-# this could be replaced if six is used for compatibility, or there are no
-# more assertions about items being a string
-
-
 def getObj(s):
     global compiler
     if compiler is None:
@@ -553,11 +548,11 @@ def __getitem__(self, key):
         """Fetch the item and do string interpolation."""
         val = dict.__getitem__(self, key)
         if self.main.interpolation: 
-            if isinstance(val, six.string_types):
+            if isinstance(val, str):
                 return self._interpolate(key, val)
             if isinstance(val, list):
                 def _check(entry):
-                    if isinstance(entry, six.string_types):
+                    if isinstance(entry, str):
                         return self._interpolate(key, entry)
                     return entry
                 new = [_check(entry) for entry in val]
@@ -580,7 +575,7 @@ def __setitem__(self, key, value, unrepr=False):
         ``unrepr`` must be set when setting a value to a dictionary, without
         creating a new sub-section.
         """
-        if not isinstance(key, six.string_types):
+        if not isinstance(key, str):
             raise ValueError('The key "%s" is not a string.' % key)
 
         # add the comment
@@ -614,11 +609,11 @@ def __setitem__(self, key, value, unrepr=False):
             if key not in self:
                 self.scalars.append(key)
             if not self.main.stringify:
-                if isinstance(value, six.string_types):
+                if isinstance(value, str):
                     pass
                 elif isinstance(value, (list, tuple)):
                     for entry in value:
-                        if not isinstance(entry, six.string_types):
+                        if not isinstance(entry, str):
                             raise TypeError('Value is not a string "%s".' % entry)
                 else:
                     raise TypeError('Value is not a string "%s".' % value)
@@ -959,7 +954,7 @@ def as_bool(self, key):
             return False
         else:
             try:
-                if not isinstance(val, six.string_types):
+                if not isinstance(val, str):
                     # TODO: Why do we raise a KeyError here?
                     raise KeyError()
                 else:
@@ -1230,7 +1225,7 @@ def __init__(self, infile=None, options=None, configspec=None, encoding=None,
 
 
     def _load(self, infile, configspec):
-        if isinstance(infile, six.string_types):
+        if isinstance(infile, str):
             self.filename = infile
             if os.path.isfile(infile):
                 with open(infile, 'rb') as h:
@@ -1298,7 +1293,7 @@ def set_section(in_section, this_section):
                         break
                 break
 
-        assert all(isinstance(line, six.string_types) for line in content), repr(content)
+        assert all(isinstance(line, str) for line in content), repr(content)
         content = [line.rstrip('\r\n') for line in content]
 
         self._parse(content)
@@ -1403,7 +1398,7 @@ def _handle_bom(self, infile):
         else:
             line = infile
 
-        if isinstance(line, six.text_type):
+        if isinstance(line, str):
             # it's already decoded and there's no need to do anything
             # else, just use the _decode utility method to handle
             # listifying appropriately
@@ -1448,7 +1443,7 @@ def _handle_bom(self, infile):
 
         # No encoding specified - so we need to check for UTF8/UTF16
         for BOM, (encoding, final_encoding) in list(BOMS.items()):
-            if not isinstance(line, six.binary_type) or not line.startswith(BOM):
+            if not isinstance(line, bytes) or not line.startswith(BOM):
                 # didn't specify a BOM, or it's not a bytestring
                 continue
             else:
@@ -1464,30 +1459,26 @@ def _handle_bom(self, infile):
                     else:
                         infile = newline
                     # UTF-8
-                    if isinstance(infile, six.text_type):
+                    if isinstance(infile, str):
                         return infile.splitlines(True)
-                    elif isinstance(infile, six.binary_type):
+                    elif isinstance(infile, bytes):
                         return infile.decode('utf-8').splitlines(True)
                     else:
                         return self._decode(infile, 'utf-8')
                 # UTF16 - have to decode
                 return self._decode(infile, encoding)
 
 
-        if six.PY2 and isinstance(line, str):
-            # don't actually do any decoding, since we're on python 2 and
-            # returning a bytestring is fine
-            return self._decode(infile, None)
         # No BOM discovered and no encoding specified, default to UTF-8
-        if isinstance(infile, six.binary_type):
+        if isinstance(infile, bytes):
             return infile.decode('utf-8').splitlines(True)
         else:
             return self._decode(infile, 'utf-8')
 
 
     def _a_to_u(self, aString):
         """Decode ASCII strings to unicode if a self.encoding is specified."""
-        if isinstance(aString, six.binary_type) and self.encoding:
+        if isinstance(aString, bytes) and self.encoding:
             return aString.decode(self.encoding)
         else:
             return aString
@@ -1499,9 +1490,9 @@ def _decode(self, infile, encoding):
         
         if is a string, it also needs converting to a list.
         """
-        if isinstance(infile, six.string_types):
+        if isinstance(infile, str):
             return infile.splitlines(True)
-        if isinstance(infile, six.binary_type):
+        if isinstance(infile, bytes):
             # NOTE: Could raise a ``UnicodeDecodeError``
             if encoding:
                 return infile.decode(encoding).splitlines(True)
@@ -1510,7 +1501,7 @@ def _decode(self, infile, encoding):
 
         if encoding:
             for i, line in enumerate(infile):
-                if isinstance(line, six.binary_type):
+                if isinstance(line, bytes):
                     # NOTE: The isinstance test here handles mixed lists of unicode/string
                     # NOTE: But the decode will break on any non-string values
                     # NOTE: Or could raise a ``UnicodeDecodeError``
@@ -1520,7 +1511,7 @@ def _decode(self, infile, encoding):
 
     def _decode_element(self, line):
         """Decode element to unicode if necessary."""
-        if isinstance(line, six.binary_type) and self.default_encoding:
+        if isinstance(line, bytes) and self.default_encoding:
             return line.decode(self.default_encoding)
         else:
             return line
@@ -1532,7 +1523,7 @@ def _str(self, value):
         Used by ``stringify`` within validate, to turn non-string values
         into strings.
         """
-        if not isinstance(value, six.string_types):
+        if not isinstance(value, str):
             # intentially 'str' because it's just whatever the "normal"
             # string type is for the python version we're dealing with
             return str(value)
@@ -1786,7 +1777,7 @@ def _quote(self, value, multiline=True):
                 return self._quote(value[0], multiline=False) + ','
             return ', '.join([self._quote(val, multiline=False)
                 for val in value])
-        if not isinstance(value, six.string_types):
+        if not isinstance(value, str):
             if self.stringify:
                 # intentially 'str' because it's just whatever the "normal"
                 # string type is for the python version we're dealing with
@@ -2111,7 +2102,7 @@ def write(self, outfile=None, section=None):
         if not output.endswith(newline):
             output += newline
 
-        if isinstance(output, six.binary_type):
+        if isinstance(output, bytes):
             output_bytes = output
         else:
             output_bytes = output.encode(self.encoding or
@@ -2353,7 +2344,7 @@ def reload(self):
         This method raises a ``ReloadError`` if the ConfigObj doesn't have
         a filename attribute pointing to a file.
         """
-        if not isinstance(self.filename, six.string_types):
+        if not isinstance(self.filename, str):
             raise ReloadError()
 
         filename = self.filename