[BUG] DeprecationWarning in vendored urllib3 #1586
Description
Steps to reproduce
python -Wd -c "import telegram.ext"
Expected behaviour
no output
Actual behaviour
.venv/lib/python3.7/site-packages/future/standard_library/__init__.py:65
.venv/lib/python3.7/site-packages/future/standard_library/__init__.py:65: DeprecationWarning: the imp module is deprecated in favour of importlib; see the module's documentation for alternative uses
import imp
.venv/lib/python3.7/site-packages/telegram/vendor/ptb_urllib3/urllib3/util/selectors.py:11
.venv/lib/python3.7/site-packages/telegram/vendor/ptb_urllib3/urllib3/util/selectors.py:11: DeprecationWarning: Using or importing the ABCs from 'collections' instead of from 'collections.abc' is deprecated, and in 3.8 it will stop working
from collections import namedtuple, Mapping
.venv/lib/python3.7/site-packages/telegram/vendor/ptb_urllib3/urllib3/_collections.py:2
.venv/lib/python3.7/site-packages/telegram/vendor/ptb_urllib3/urllib3/_collections.py:2: DeprecationWarning: Using or importing the ABCs from 'collections' instead of from 'collections.abc' is deprecated, and in 3.8 it will stop working
from collections import Mapping, MutableMapping
Configuration
Operating System:
Linux 4.19.0-5-amd64 #1 SMP Debian 4.19.37-5 (2019-06-19) x86_64 GNU/Linux
Version of Python, python-telegram-bot & dependencies:
python-telegram-bot 12.2.0
certifi 2019.09.11
future 0.18.1
Python 3.7.3 (default, Apr 3 2019, 05:39:12) [GCC 8.3.0]
Logs
none
complement
python -Wd -c "import urllib3" outputs nothing.