Command /home/docs/checkouts/readthedocs.org/user_builds/ethpm-spec/envs/latest/bin/python -m pip install --exists-action=w --no-cache-dir -r requirements.txt failed: DEPRECATION: Python 2.7 reached the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 is no longer maintained. pip 21.0 will drop support for Python 2.7 in January 2021. More details about Python 2 support in pip can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support pip 21.0 will remove support for this functionality. Collecting alabaster==0.7.10 Downloading alabaster-0.7.10-py2.py3-none-any.whl (12 kB) Collecting antlr4-python3-runtime==4.7.1 Downloading antlr4-python3-runtime-4.7.1.tar.gz (111 kB) Collecting Babel==2.5.3 Downloading Babel-2.5.3-py2.py3-none-any.whl (6.8 MB) Collecting certifi==2018.4.16 Downloading certifi-2018.4.16-py2.py3-none-any.whl (150 kB) Collecting chardet==3.0.4 Downloading chardet-3.0.4-py2.py3-none-any.whl (133 kB) Collecting docutils==0.14 Downloading docutils-0.14-py2-none-any.whl (543 kB) Collecting idna==2.6 Downloading idna-2.6-py2.py3-none-any.whl (56 kB) Collecting imagesize==1.0.0 Downloading imagesize-1.0.0-py2.py3-none-any.whl (5.0 kB) Collecting Jinja2==2.10.1 Downloading Jinja2-2.10.1-py2.py3-none-any.whl (124 kB) Collecting jsonpointer==2.0 Downloading jsonpointer-2.0-py2.py3-none-any.whl (7.6 kB) Collecting jsonschema==3.2.0 Downloading jsonschema-3.2.0-py2.py3-none-any.whl (56 kB) Requirement already satisfied: MarkupSafe==1.1.1 in /home/docs/checkouts/readthedocs.org/user_builds/ethpm-spec/envs/latest/lib/python2.7/site-packages (from -r requirements.txt (line 12)) (1.1.1) Collecting packaging==17.1 Downloading packaging-17.1-py2.py3-none-any.whl (24 kB) Collecting pbr==4.0.3 Downloading pbr-4.0.3-py2.py3-none-any.whl (98 kB) Collecting peewee==3.4.0 Downloading peewee-3.4.0.tar.gz (613 kB) Collecting Pygments==2.2.0 Downloading Pygments-2.2.0-py2.py3-none-any.whl (841 kB) Collecting pygments-lexer-solidity==0.2.0 Downloading pygments-lexer-solidity-0.2.0.tar.gz (5.1 kB) Collecting pyparsing==2.2.0 Downloading pyparsing-2.2.0-py2.py3-none-any.whl (56 kB) Collecting pytz==2018.4 Downloading pytz-2018.4-py2.py3-none-any.whl (510 kB) ERROR: Could not find a version that satisfies the requirement pytest==5.4.2 (from -r requirements.txt (line 20)) (from versions: 2.0.0, 2.0.1, 2.0.2, 2.0.3, 2.1.0, 2.1.1, 2.1.2, 2.1.3, 2.2.0, 2.2.1, 2.2.2, 2.2.3, 2.2.4, 2.3.0, 2.3.1, 2.3.2, 2.3.3, 2.3.4, 2.3.5, 2.4.0, 2.4.1, 2.4.2, 2.5.0, 2.5.1, 2.5.2, 2.6.0, 2.6.1, 2.6.2, 2.6.3, 2.6.4, 2.7.0, 2.7.1, 2.7.2, 2.7.3, 2.8.0, 2.8.1, 2.8.2, 2.8.3, 2.8.4, 2.8.5, 2.8.6, 2.8.7, 2.9.0, 2.9.1, 2.9.2, 3.0.0, 3.0.1, 3.0.2, 3.0.3, 3.0.4, 3.0.5, 3.0.6, 3.0.7, 3.1.0, 3.1.1, 3.1.2, 3.1.3, 3.2.0, 3.2.1, 3.2.2, 3.2.3, 3.2.4, 3.2.5, 3.3.0, 3.3.1, 3.3.2, 3.4.0, 3.4.1, 3.4.2, 3.5.0, 3.5.1, 3.6.0, 3.6.1, 3.6.2, 3.6.3, 3.6.4, 3.7.0, 3.7.1, 3.7.2, 3.7.3, 3.7.4, 3.8.0, 3.8.1, 3.8.2, 3.9.1, 3.9.2, 3.9.3, 3.10.0, 3.10.1, 4.0.0, 4.0.1, 4.0.2, 4.1.0, 4.1.1, 4.2.0, 4.2.1, 4.3.0, 4.3.1, 4.4.0, 4.4.1, 4.4.2, 4.5.0, 4.6.0, 4.6.1, 4.6.2, 4.6.3, 4.6.4, 4.6.5, 4.6.6, 4.6.7, 4.6.8, 4.6.9, 4.6.10, 4.6.11) ERROR: No matching distribution found for pytest==5.4.2 (from -r requirements.txt (line 20))