remove some instances of branching code supporting older python versions

docs/managing-environments.md

@@ -30,12 +30,12 @@ to activate one explicitly, see [Switching environments](#switching-between-envi
 To easily switch between Python versions, it is recommended to
 use [pyenv](https://github.com/pyenv/pyenv) or similar tools.
 
-For instance, if your project is Python 2.7 only, a standard workflow
+For instance, if your project is Python 3.6 only, a standard workflow
 would be:
 
 ```bash
-pyenv install 2.7.15
-pyenv local 2.7.15  # Activate Python 2.7 for the current project
+pyenv install 3.6.15
+pyenv local 3.6.15  # Activate Python 3.6 for the current project
 poetry install
 ```
 {{% /note %}}

poetry/repositories/installed_repository.py

@@ -63,11 +63,7 @@ def get_package_paths(cls, env: Env, name: str) -> Set[Path]:
                     if line and not line.startswith(("#", "import ", "import\t")):
                         path = Path(line)
                         if not path.is_absolute():
-                            try:
-                                path = lib.joinpath(path).resolve()
-                            except FileNotFoundError:
-                                # this is required to handle pathlib oddity on win32 python==3.5
-                                path = lib.joinpath(path)
+                            path = lib.joinpath(path).resolve()
                         paths.add(path)
 
         src_path = env.path / "src" / name

sonnet

@@ -230,8 +230,6 @@ class MakeReleaseCommand(Command):
                 subprocess.check_output(
                     [python, "-V"], stderr=subprocess.STDOUT, shell=WINDOWS
                 )
-                if version == "3.4" and WINDOWS:
-                    continue
 
                 subprocess.check_output([python, "-m", "pip", "install", "pip", "-U"])
             except subprocess.CalledProcessError:

tests/installation/test_installer.py

@@ -2,7 +2,6 @@
 
 import itertools
 import json
-import sys
 
 from pathlib import Path
 
@@ -1751,11 +1750,7 @@ def test_installer_test_solver_finds_compatible_package_for_dependency_python_no
 
     expected = fixture("with-conditional-dependency")
     assert locker.written_data == expected
-
-    if sys.version_info >= (3, 5, 0):
-        assert 1 == installer.executor.installations_count
-    else:
-        assert 0 == installer.executor.installations_count
+    assert 1 == installer.executor.installations_count
 
 
 def test_installer_required_extras_should_not_be_removed_when_updating_single_dependency(

tests/installation/test_installer_old.py

@@ -1,7 +1,6 @@
 from __future__ import unicode_literals
 
 import itertools
-import sys
 
 from pathlib import Path
 
@@ -1447,11 +1446,7 @@ def test_installer_test_solver_finds_compatible_package_for_dependency_python_no
     assert locker.written_data == expected
 
     installs = installer.installer.installs
-
-    if sys.version_info >= (3, 5, 0):
-        assert len(installs) == 1
-    else:
-        assert len(installs) == 0
+    assert len(installs) == 1
 
 
 def test_installer_required_extras_should_not_be_removed_when_updating_single_dependency(

tests/utils/fixtures/setups/pyyaml/setup.py

@@ -308,10 +308,7 @@ def run(self):
         build_cmd = self.get_finalized_command("build")
         build_cmd.run()
         sys.path.insert(0, build_cmd.build_lib)
-        if sys.version_info[0] < 3:
-            sys.path.insert(0, "tests/lib")
-        else:
-            sys.path.insert(0, "tests/lib3")
+        sys.path.insert(0, "tests/lib3")
         import test_all
 
         if not test_all.main([]):
@@ -337,7 +334,7 @@ def run(self):
         url=URL,
         download_url=DOWNLOAD_URL,
         classifiers=CLASSIFIERS,
-        package_dir={"": {2: "lib", 3: "lib3"}[sys.version_info[0]]},
+        package_dir={"": "lib3"},
         packages=["yaml"],
         ext_modules=[
             Extension(

tests/utils/fixtures/setups/sqlalchemy/setup.py

@@ -12,8 +12,6 @@
 from setuptools.command.test import test as TestCommand
 
 cmdclass = {}
-if sys.version_info < (2, 7):
-    raise Exception("SQLAlchemy requires Python 2.7 or higher.")
 
 cpython = platform.python_implementation() == "CPython"
 

tests/utils/test_env.py

@@ -963,12 +963,7 @@ def test_env_system_packages(tmp_path, config):
 
     EnvManager(config).build_venv(path=venv_path, flags={"system-site-packages": True})
 
-    if sys.version_info >= (3, 3):
-        assert "include-system-site-packages = true" in pyvenv_cfg.read_text()
-    elif (2, 6) < sys.version_info < (3, 0):
-        assert not venv_path.joinpath(
-            "lib", "python2.7", "no-global-site-packages.txt"
-        ).exists()
+    assert "include-system-site-packages = true" in pyvenv_cfg.read_text()
 
 
 def test_env_finds_the_correct_executables(tmp_dir, manager):