Drop support for EOL Python 2.6

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,