Bump min Python version from 3.5.4 to 3.7.2

Author: c0llab0rat0r

.travis.yml

@@ -1,36 +1,32 @@
 # Config file for automatic testing at travis-ci.com
 
 language: python
-dist: bionic  # VirtualEnv is too old on xenial
+dist: focal
 
 matrix:
    include:
-      - python: "3.5"
-      - python: "3.6"
       - python: "3.7"
       - python: "3.8"
-      - python: "pypy3"
+      # - python: "pypy3"  travis doesn't support pypy on Python 3.7 yet
       - python: "3.8"
         env: IPFS_VERSION=compat
       - python: "3.8"
         env: TOXENV=py3-httpx
+        dist: bionic
       - python: "3.8"
         env: TOXENV=styleck
         before_install: ":"
       - python: "3.8"
         env: TOXENV=typeck
         before_install: ":"
-     
+
       # Testing on macOS/Darwin tends to be much slower so only test the bare minimum
       #
-      # Minimum testing version is 3.6, since the 3.5 binaries from python.org fail
-      # with TLS error when trying to install `tox`.
-      #
       # When changing any version here also update the relevant checksum below with
       # the values found on the https://python.org/ website.
       - os: osx
         language: shell
-        env: PYTHON_VERSION=3.6.8-macosx10.9
+        env: PYTHON_VERSION=3.7.9-macosx10.9
       - os: osx
         language: shell
         env: PYTHON_VERSION=3.8.2-macosx10.9
@@ -113,7 +109,7 @@ install:
       
       ### ====== MODIFY THIS WHEN CHANGING MACOS PYTHON TEST VERSIONS ====== ###
       case "${PYTHON_VERSION}" in
-         3.6.8-macosx10.9) MD5_MACOS="786c4d9183c754f58751d52f509bc971" ;;
+         3.7.9-macosx10.9) MD5_MACOS="4b544fc0ac8c3cffdb67dede23ddb79e" ;;
          3.8.2-macosx10.9) MD5_MACOS="f12203128b5c639dc08e5a43a2812cc7" ;;
       esac
       ### ------------------------------ END ------------------------------- ###

ipfshttpclient/client/__init__.py

@@ -17,6 +17,7 @@
 VERSION_BLACKLIST = []
 VERSION_MAXIMUM   = "0.8.0"
 
+from . import base
 from . import bitswap
 from . import block
 from . import bootstrap

ipfshttpclient/client/base.py

@@ -9,11 +9,14 @@
 from .. import multipart, http, utils
 
 
+#XXX: Review if this is still necessary after requiring Python 3.8.
 if ty.TYPE_CHECKING:
 	import typing_extensions as ty_ext
 else:
 	ty_ext = utils
 
+# Ensure that proper types show up when generating documentation without hard-depending on
+# the cid package.
 if "cid" in sys.modules:
 	import cid  # type: ignore[import]
 	cid_t = ty.Union[str, cid.CIDv0, cid.CIDv1]
@@ -29,7 +32,7 @@
 json_primitive_t = utils.json_primitive_t
 json_value_t = utils.json_value_t
 
-# The following would be much more useful once GH/python/mypy#4441 is implemented…
+#XXX: The following would be more useful with https://github.com/python/mypy/issues/4441
 if ty.TYPE_CHECKING:
 	# Lame workaround for type checkers
 	CommonArgs = ty.Union[bool, http.auth_t, http.cookies_t, http.reqdata_sync_t,
@@ -48,7 +51,7 @@
 else:
 	CommonArgs = ty.Dict[str, ty.Any]
 
-# work around GH/mypy/mypy#731: no recursive structural types yet
+#XXX: work around https://github.com/python/mypy/issues/731: no recursive structural types yet
 response_item_t = ty.Union[
 	json_primitive_t,
 	"ResponseBase",

ipfshttpclient/exceptions.py

@@ -1,5 +1,5 @@
 """
-The class hierachy for exceptions is::
+The class hierarchy for exceptions is::
 
 	Error
 	 ├── VersionMismatch
@@ -161,4 +161,4 @@ class ConnectionError(CommunicationError):
 
 class TimeoutError(CommunicationError):
 	"""Raised when the daemon didn't respond in time."""
-	__slots__ = ()
+	__slots__ = ()