Drop support for EOL Python 2.6

conftest.py

@@ -13,7 +13,7 @@ from parso.utils import parse_version_string
 
 collect_ignore = ["setup.py"]
 
-VERSIONS_2 = '2.6', '2.7'
+VERSIONS_2 = '2.7'
 VERSIONS_3 = '3.3', '3.4', '3.5', '3.6', '3.7', '3.8'
 
 

parso/_compatibility.py

@@ -1,14 +1,10 @@
 """
-To ensure compatibility from Python ``2.6`` - ``3.3``, a module has been
+To ensure compatibility from Python ``2.7`` - ``3.3``, a module has been
 created. Clearly there is huge need to use conforming syntax.
 """
 import sys
 import platform
 
-# Cannot use sys.version.major and minor names, because in Python 2.6 it's not
-# a namedtuple.
-py_version = int(str(sys.version_info[0]) + str(sys.version_info[1]))
-
 # unicode function
 try:
     unicode = unicode
@@ -39,7 +35,7 @@ def u(string):
     have to cast back to a unicode (and we know that we always deal with valid
     unicode, because we check that in the beginning).
     """
-    if py_version >= 30:
+    if sys.version_info.major >= 3:
         return str(string)
 
     if not isinstance(string, unicode):
@@ -48,8 +44,10 @@ def u(string):
 
 
 try:
+    # Python 2.7
     FileNotFoundError = FileNotFoundError
 except NameError:
+    # Python 3.3+
     FileNotFoundError = IOError
 
 
@@ -65,39 +63,7 @@ def utf8_repr(func):
         else:
             return result
 
-    if py_version >= 30:
+    if sys.version_info.major >= 3:
         return func
     else:
         return wrapper
-
-
-try:
-    from functools import total_ordering
-except ImportError:
-    # Python 2.6
-    def total_ordering(cls):
-        """Class decorator that fills in missing ordering methods"""
-        convert = {
-            '__lt__': [('__gt__', lambda self, other: not (self < other or self == other)),
-                       ('__le__', lambda self, other: self < other or self == other),
-                       ('__ge__', lambda self, other: not self < other)],
-            '__le__': [('__ge__', lambda self, other: not self <= other or self == other),
-                       ('__lt__', lambda self, other: self <= other and not self == other),
-                       ('__gt__', lambda self, other: not self <= other)],
-            '__gt__': [('__lt__', lambda self, other: not (self > other or self == other)),
-                       ('__ge__', lambda self, other: self > other or self == other),
-                       ('__le__', lambda self, other: not self > other)],
-            '__ge__': [('__le__', lambda self, other: (not self >= other) or self == other),
-                       ('__gt__', lambda self, other: self >= other and not self == other),
-                       ('__lt__', lambda self, other: not self >= other)]
-        }
-        roots = set(dir(cls)) & set(convert)
-        if not roots:
-            raise ValueError('must define at least one ordering operation: < > <= >=')
-        root = max(roots)       # prefer __lt__ to __le__ to __gt__ to __ge__
-        for opname, opfunc in convert[root]:
-            if opname not in roots:
-                opfunc.__name__ = opname
-                opfunc.__doc__ = getattr(int, opname).__doc__
-                setattr(cls, opname, opfunc)
-        return cls

parso/python/tokenize.py

@@ -19,7 +19,6 @@ import itertools as _itertools
 from codecs import BOM_UTF8
 
 from parso.python.token import PythonTokenTypes
-from parso._compatibility import py_version
 from parso.utils import split_lines
 
 
@@ -50,7 +49,7 @@ BOM_UTF8_STRING = BOM_UTF8.decode('utf-8')
 
 _token_collection_cache = {}
 
-if py_version >= 30:
+if sys.version_info.major >= 3:
     # Python 3 has str.isidentifier() to check if a char is a valid identifier
     is_identifier = str.isidentifier
 else:
@@ -86,7 +85,7 @@ def _all_string_prefixes(version_info, include_fstring=False, only_fstring=False
     #  and don't contain any permuations (include 'fr', but not
     #  'rf'). The various permutations will be generated.
     valid_string_prefixes = ['b', 'r', 'u']
-    if version_info >= (3, 0):
+    if version_info.major >= 3:
         valid_string_prefixes.append('br')
 
     result = set([''])
@@ -106,7 +105,7 @@ def _all_string_prefixes(version_info, include_fstring=False, only_fstring=False
             # create a list with upper and lower versions of each
             #  character
             result.update(different_case_versions(t))
-    if version_info <= (2, 7):
+    if version_info.major == 2:
         # In Python 2 the order cannot just be random.
         result.update(different_case_versions('ur'))
         result.update(different_case_versions('br'))
@@ -164,7 +163,7 @@ def _create_token_collection(version_info):
     else:
         Hexnumber = r'0[xX][0-9a-fA-F]+'
         Binnumber = r'0[bB][01]+'
-        if version_info >= (3, 0):
+        if version_info.major >= 3:
             Octnumber = r'0[oO][0-7]+'
         else:
             Octnumber = '0[oO]?[0-7]+'

parso/tree.py

@@ -1,6 +1,7 @@
+import sys
 from abc import abstractmethod, abstractproperty
 
-from parso._compatibility import utf8_repr, encoding, py_version
+from parso._compatibility import utf8_repr, encoding
 from parso.utils import split_lines
 
 
@@ -321,7 +322,7 @@ class BaseNode(NodeOrLeaf):
     @utf8_repr
     def __repr__(self):
         code = self.get_code().replace('\n', ' ').replace('\r', ' ').strip()
-        if not py_version >= 30:
+        if not sys.version_info.major >= 3:
             code = code.encode(encoding, 'replace')
         return "<%s: %s@%s,%s>" % \
             (type(self).__name__, code, self.start_pos[0], self.start_pos[1])

parso/utils.py

@@ -2,8 +2,9 @@ from collections import namedtuple
 import re
 import sys
 from ast import literal_eval
+from functools import total_ordering
 
-from parso._compatibility import unicode, total_ordering
+from parso._compatibility import unicode
 
 # The following is a list in Python that are line breaks in str.splitlines, but
 # not in Python. In Python only \r (Carriage Return, 0xD) and \n (Line Feed,

setup.py

@@ -34,7 +34,6 @@ setup(name='parso',
           'License :: OSI Approved :: MIT License',
           'Operating System :: OS Independent',
           'Programming Language :: Python :: 2',
-          'Programming Language :: Python :: 2.6',
           'Programming Language :: Python :: 2.7',
           'Programming Language :: Python :: 3',
           'Programming Language :: Python :: 3.3',

test/failing_examples.py

@@ -282,10 +282,7 @@ if sys.version_info >= (3, 6):
         'f"s" b""',
         'b"s" f""',
     ]
-if sys.version_info >= (2, 7):
+FAILING_EXAMPLES.append('[a, 1] += 3')
-    # This is something that raises a different error in 2.6 than in the other
-    # versions. Just skip it for 2.6.
-    FAILING_EXAMPLES.append('[a, 1] += 3')
 
 if sys.version_info[:2] == (3, 5):
     # yields are not allowed in 3.5 async functions. Therefore test them

test/test_normalizer_issues_files.py

@@ -5,9 +5,9 @@ tests of pydocstyle.
 
 import difflib
 import re
+from functools import total_ordering
 
 import parso
-from parso._compatibility import total_ordering
 from parso.utils import python_bytes_to_unicode
 
 

test/test_python_errors.py

@@ -118,22 +118,12 @@ def _get_actual_exception(code):
             assert False, "The piece of code should raise an exception."
 
     # SyntaxError
-    # Python 2.6 has a bit different error messages here, so skip it.
-    if sys.version_info[:2] == (2, 6) and wanted == 'SyntaxError: unexpected EOF while parsing':
-        wanted = 'SyntaxError: invalid syntax'
-
     if wanted == 'SyntaxError: non-keyword arg after keyword arg':
         # The python 3.5+ way, a bit nicer.
         wanted = 'SyntaxError: positional argument follows keyword argument'
     elif wanted == 'SyntaxError: assignment to keyword':
         return [wanted, "SyntaxError: can't assign to keyword",
                 'SyntaxError: cannot assign to __debug__'], line_nr
-    elif wanted == 'SyntaxError: assignment to None':
-        # Python 2.6 does has a slightly different error.
-        wanted = 'SyntaxError: cannot assign to None'
-    elif wanted == 'SyntaxError: can not assign to __debug__':
-        # Python 2.6 does has a slightly different error.
-        wanted = 'SyntaxError: cannot assign to __debug__'
     elif wanted == 'SyntaxError: can use starred expression only as assignment target':
         # Python 3.4/3.4 have a bit of a different warning than 3.5/3.6 in
         # certain places. But in others this error makes sense.

test/test_tokenize.py

@@ -4,8 +4,8 @@ import sys
 from textwrap import dedent
 
 import pytest
+import sys
 
-from parso._compatibility import py_version
 from parso.utils import split_lines, parse_version_string
 from parso.python.token import PythonTokenTypes
 from parso.python import tokenize
@@ -137,7 +137,7 @@ def test_identifier_contains_unicode():
     ''')
     token_list = _get_token_list(fundef)
     unicode_token = token_list[1]
-    if py_version >= 30:
+    if sys.version_info.major >= 3:
         assert unicode_token[0] == NAME
     else:
         # Unicode tokens in Python 2 seem to be identified as operators.
@@ -185,19 +185,19 @@ def test_ur_literals():
             assert typ == NAME
 
     check('u""')
-    check('ur""', is_literal=not py_version >= 30)
+    check('ur""', is_literal=not sys.version_info.major >= 3)
-    check('Ur""', is_literal=not py_version >= 30)
+    check('Ur""', is_literal=not sys.version_info.major >= 3)
-    check('UR""', is_literal=not py_version >= 30)
+    check('UR""', is_literal=not sys.version_info.major >= 3)
     check('bR""')
     # Starting with Python 3.3 this ordering is also possible.
-    if py_version >= 33:
+    if sys.version_info.major >= 3:
         check('Rb""')
 
     # Starting with Python 3.6 format strings where introduced.
-    check('fr""', is_literal=py_version >= 36)
+    check('fr""', is_literal=sys.version_info >= (3, 6))
-    check('rF""', is_literal=py_version >= 36)
+    check('rF""', is_literal=sys.version_info >= (3, 6))
-    check('f""', is_literal=py_version >= 36)
+    check('f""', is_literal=sys.version_info >= (3, 6))
-    check('F""', is_literal=py_version >= 36)
+    check('F""', is_literal=sys.version_info >= (3, 6))
 
 
 def test_error_literal():

tox.ini

@@ -1,11 +1,11 @@
 [tox]
-envlist = {py26,py27,py33,py34,py35,py36,py37}
+envlist = {py27,py33,py34,py35,py36,py37}
 [testenv]
 extras = testing
 deps =
-    py26,py33: pytest>=3.0.7,<3.3
+    py33: pytest>=3.0.7,<3.3
     py27,py34: pytest<5
-    py26,py33: setuptools<37
+    py33: setuptools<37
     coverage: coverage
 setenv =
 # https://github.com/tomchristie/django-rest-framework/issues/1957