Remove Python 3.6

.github/workflows/test-suite.yml

@@ -14,7 +14,7 @@ jobs:
 
     strategy:
       matrix:
-        python-version: ["3.6", "3.7", "3.8", "3.9", "3.10"]
+        python-version: ["3.7", "3.8", "3.9", "3.10"]
 
     steps:
       - uses: "actions/checkout@v2"

README.md

@@ -40,7 +40,7 @@ It is production-ready, and gives you the following:
 
 ## Requirements
 
-Python 3.6+
+Python 3.7+
 
 ## Installation
 

docs/index.md

@@ -36,7 +36,7 @@ It is production-ready, and gives you the following:
 
 ## Requirements
 
-Python 3.6+
+Python 3.7+
 
 ## Installation
 

setup.py

@@ -25,7 +25,7 @@ def get_long_description():
 
 setup(
     name="starlette",
-    python_requires=">=3.6",
+    python_requires=">=3.7",
     version=get_version("starlette"),
     url="https://github.com/encode/starlette",
     license="BSD",
@@ -40,7 +40,6 @@ def get_long_description():
     install_requires=[
         "anyio>=3.0.0,<4",
         "typing_extensions; python_version < '3.8'",
-        "contextlib2 >= 21.6.0; python_version < '3.7'",
     ],
     extras_require={
         "full": [
@@ -59,7 +58,6 @@ def get_long_description():
         "Operating System :: OS Independent",
         "Topic :: Internet :: WWW/HTTP",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",

starlette/concurrency.py

@@ -1,15 +1,10 @@
+import contextvars
 import functools
 import typing
 from typing import Any, AsyncGenerator, Iterator
 
 import anyio
 
-try:
-    import contextvars  # Python 3.7+ only or via contextvars backport.
-except ImportError:  # pragma: no cover
-    contextvars = None  # type: ignore
-
-
 T = typing.TypeVar("T")