Remove redundant code for EOL Python 3.7 and older (#423)

* Remove code for Python 3.5 pre-releases

* Remove code for Python 3.7

Author: hugovk

pyperformance/_pip.py

@@ -2,12 +2,11 @@
 import os.path
 import sys
 
-from . import _pythoninfo, _utils
+from . import _utils
 
 GET_PIP_URL = "https://bootstrap.pypa.io/get-pip.py"
 # pip 6 is the first version supporting environment markers
 MIN_PIP = "6.0"
-OLD_PIP = "7.1.2"
 OLD_SETUPTOOLS = "18.5"
 
 
@@ -21,21 +20,6 @@ def get_pkg_name(req):
     return req
 
 
-def get_best_pip_version(python):
-    """Return the pip to install for the given Python executable."""
-    if not python or isinstance(python, str):
-        info = _pythoninfo.get_info(python)
-    else:
-        info = python
-    # On Python: 3.5a0 <= version < 3.5.0 (final), install pip 7.1.2,
-    # the last version working on Python 3.5a0:
-    # https://sourceforge.net/p/pyparsing/bugs/100/
-    if 0x30500A0 <= info.sys.hexversion < 0x30500F0:
-        return OLD_PIP
-    else:
-        return None
-
-
 def run_pip(cmd, *args, **kwargs):
     """Return the result of running pip with the given args."""
     return _utils.run_python("-m", "pip", cmd, *args, **kwargs)
@@ -90,9 +74,6 @@ def install_pip(
 
     # python get-pip.py
     argv = [python, "-u", filename]
-    version = get_best_pip_version(info or python)
-    if version:
-        argv.append(version)
     res = _utils.run_cmd(argv, env=env)
     ec, _, _ = res
     if ec != 0:
@@ -113,14 +94,8 @@ def upgrade_pip(
     if not python:
         python = getattr(info, "executable", None) or sys.executable
 
-    version = get_best_pip_version(info or python)
-    if version:
-        reqs = [f"pip=={version}"]
-        if installer:
-            reqs.append(f"setuptools=={OLD_SETUPTOOLS}")
-    else:
-        # pip 6 is the first version supporting environment markers
-        reqs = [f"pip>={MIN_PIP}"]
+    # pip 6 is the first version supporting environment markers
+    reqs = [f"pip>={MIN_PIP}"]
     res = install_requirements(*reqs, python=python, upgrade=True, **kwargs)
     ec, _, _ = res
     if ec != 0:

pyperformance/compile.py

@@ -373,11 +373,6 @@ def download(self, url, filename):
         _utils.download(url, filename)
 
     def _install_pip(self):
-        # On Python: 3.5a0 <= version < 3.5.0 (final), install pip 7.1.2,
-        # the last version working on Python 3.5a0:
-        # https://sourceforge.net/p/pyparsing/bugs/100/
-        assert self.hexversion > 0x3060000, self.hexversion
-
         # is pip already installed and working?
         exitcode = self.run_nocheck(self.program, "-u", "-m", "pip", "--version")
         if not exitcode:

pyperformance/tests/__init__.py

@@ -145,27 +145,6 @@ def decorator(func):
     return func
 
 
-class Compat:
-    """A mixin that lets older Pythons use newer unittest features."""
-
-    if sys.version_info < (3, 8):
-
-        @classmethod
-        def setUpClass(cls):
-            super().setUpClass()
-            cls._cleanups = []
-
-        @classmethod
-        def tearDownClass(cls):
-            super().tearDownClass()
-            for cleanup in cls._cleanups:
-                cleanup()
-
-        @classmethod
-        def addClassCleanup(cls, cleanup):
-            cls._cleanups.append(cleanup)
-
-
 #############################
 # functional tests
 
@@ -181,7 +160,7 @@ def SLOW(f):
     return unittest.skip("way too slow")(mark("slow", f))
 
 
-class Functional(Compat):
+class Functional:
     """A mixin for functional tests.
 
     In this context, "functional" means the test touches the filesystem,