Drop support for Python 2, Python 3.4 and 3.5

Python 2 has been EOL for since Jan 1, 2020, Python 3.4 has been EOL
since Mar 18, 2019 and Python 3.5 has been EOL since Sep 13, 2020.

Drop obsolete 'from __future__' imports, drop obsolete conditionals due
to Python 2 vs. 3 differences.

.github/workflows/ci-tests.yml

@@ -21,7 +21,7 @@ jobs:
     strategy:
       matrix:
         platform: [ubuntu-latest, windows-latest]
-        python-version: [2.7, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9]
+        python-version: [3.6, 3.7, 3.8, 3.9]
     steps:
       - name: Checkout code
         uses: actions/checkout@v2

README.md

@@ -218,9 +218,9 @@ Use Pythonz to download and build a Python vm
 
 `usage: pew install [options] version`
 
-To install Python3.5.0
+To install Python3.8.0
 
-`pew install 3.5.0`
+`pew install 3.8.0`
 
 To install Pypy:
 
@@ -382,15 +382,15 @@ To run individual test scripts, run from the top level directory of the reposito
 
 To run tests under a single version of Python, specify the appropriate environment when running `tox`:
 
-`tox -e py27`
+`tox -e py38`
 
 Combine the two modes to run specific tests with a single version of Python:
 
-`tox -e py27 tests/test_setproject.py`
+`tox -e py38 tests/test_setproject.py`
 
 You can also filter them:
 
-`tox -e py34 -- -k workon`
+`tox -e py38 -- -k workon`
 
 Add new tests by modifying an existing file or creating new script in the tests directory.
 

pew/__init__.py

@@ -1,4 +1,2 @@
-from __future__ import absolute_import
-
 from . import pew
 __all__ = ['pew']

pew/_print_utils.py

@@ -1,16 +1,8 @@
-from __future__ import division, print_function
-
 import os
 from functools import partial
 from math import ceil
-try:
-    from itertools import zip_longest
-except ImportError:
-    from itertools import izip_longest as zip_longest
-try:
-    from shutil import get_terminal_size
-except ImportError:
-    from backports.shutil_get_terminal_size import get_terminal_size
+from itertools import zip_longest
+from shutil import get_terminal_size
 
 SEP = '  '
 L = len(SEP)

pew/_utils.py

@@ -7,31 +7,16 @@
 from collections import namedtuple
 from functools import partial, wraps
 from pathlib import Path
-from tempfile import NamedTemporaryFile as _ntf
-try:
-    from shutil import which
-except ImportError:
-    from shutilwhich import which
+from tempfile import NamedTemporaryFile
+from shutil import which
 
-py2 = sys.version_info[0] == 2
 windows = sys.platform == 'win32'
 
-if py2 or windows:
+if windows:
     locale.setlocale(locale.LC_CTYPE, '')
 
 encoding = locale.getlocale()[1] or 'ascii'
 
-if py2:
-    @wraps(_ntf)
-    def NamedTemporaryFile(mode):
-        return getwriter(encoding)(_ntf(mode))
-
-    def to_unicode(x):
-        return x.decode(encoding)
-else:
-    NamedTemporaryFile = _ntf
-    to_unicode = str
-
 def check_path():
     parent = os.path.dirname
     return parent(parent(which('python'))) == os.environ['VIRTUAL_ENV']

pew/pew.py

@@ -1,5 +1,3 @@
-from __future__ import print_function, absolute_import, unicode_literals
-
 import os
 import sys
 import argparse
@@ -10,10 +8,7 @@
 from subprocess import CalledProcessError
 from pathlib import Path
 
-try:
-    from shutil import get_terminal_size
-except ImportError:
-    from backports.shutil_get_terminal_size import get_terminal_size
+from shutil import get_terminal_size
 
 windows = sys.platform == 'win32'
 
@@ -46,12 +41,9 @@ def ListPythons():
     import shellingham
 
 from pew._utils import (check_call, invoke, expandpath, own, env_bin_dir,
-                        check_path, temp_environ, NamedTemporaryFile, to_unicode)
+                        check_path, temp_environ, NamedTemporaryFile)
 from pew._print_utils import print_virtualenvs
 
-if sys.version_info[0] == 2:
-    input = raw_input
-
 err = partial(print, file=sys.stderr)
 
 if windows:
@@ -170,7 +162,7 @@ def fork_bash(env, cwd):
         with NamedTemporaryFile('w+') as rcfile:
             with bashrcpath.open() as bashrc:
                 rcfile.write(bashrc.read())
-            rcfile.write('\nexport PATH="' + to_unicode(compute_path(env)) + '"')
+            rcfile.write('\nexport PATH="' + compute_path(env) + '"')
             rcfile.flush()
             return fork_shell(env, ['bash', '--rcfile', rcfile.name], cwd)
     else:

setup.py

@@ -65,9 +65,6 @@ def run(self):
         'virtualenv>=1.11', 'virtualenv-clone>=0.2.5', 'setuptools>=17.1'
     ],
     extras_require={
-        ':python_version=="2.7"': [
-            'pathlib', 'backports.shutil_get_terminal_size', 'shutilwhich'
-        ],
         ':sys_platform=="win32"': [
             'shellingham'
         ],
@@ -83,7 +80,6 @@ def run(self):
     entry_points={
         'console_scripts': ['pew = pew.pew:pew']},
     classifiers=[
-        'Programming Language :: Python :: 2',
         'Programming Language :: Python :: 3',
         'Intended Audience :: Developers',
         'Environment :: Console']

tests/test_print_utils.py

@@ -3,10 +3,7 @@
     get_best_columns_number,
     columnize,
 )
-try:
-    from unittest.mock import patch
-except ImportError:
-    from mock import patch
+from unittest.mock import patch
 
 
 def test_get_rows():

tests/utils.py

@@ -1,22 +1,7 @@
-try:
-    from tempfile import TemporaryDirectory
-except ImportError:
-    from shutil import rmtree
-    from contextlib import contextmanager
-    from tempfile import mkdtemp
-
-    @contextmanager
-    def TemporaryDirectory():
-        tmpdir = mkdtemp()
-        yield tmpdir
-        rmtree(tmpdir)
-
-try:
-    from urllib.request import urlopen
-    from urllib.error import URLError
-except ImportError:
-    from urllib import urlopen
-    URLError = IOError
+from tempfile import TemporaryDirectory
+
+from urllib.request import urlopen
+from urllib.error import URLError
 
 
 import functools

tox.ini

@@ -1,12 +1,9 @@
 [tox]
 skip_missing_interpreters=True
-envlist = py{27,34,35,36,37,38,39}-{linux,windows}, pypy
+envlist = py{36,37,38,39}-{linux,windows}, pypy
 
 [gh-actions]
 python =
-    2.7: py27
-    3.4: py34
-    3.5: py35
     3.6: py36
     3.7: py37
     3.8: py38
@@ -23,10 +20,6 @@ passenv = CI HOME
 commands = py.test -rw []
 deps =
     -r{toxinidir}/requirements.txt
-    py27: pathlib>=1.0.1
-    py27: mock
-    py27: backports.shutil_get_terminal_size
-    py27: shutilwhich
     pypy: shutilwhich
     pypy: pathlib>=1.0.1
     pypy: mock