我收到这条消息：
Collecting psycopg2
Using cached https://files.pythonhosted.org/packages/84/d7/6a93c99b5ba4d4d22daa3928b983cec66df4536ca50b22ce5dcac65e4e71/psycopg2-2.8.4.tar.gz
Building wheels for collected packages: psycopg2
Building wheel for psycopg2 (setup.py) ... error
ERROR: Command errored out with exit status 1:
command: /Users/mohsen/.virtualenvs/jalas-env/bin/python3.7 -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/private/var/folders/vh/0_hbs48171574k5y9pb97st80000gn/T/pip-install-y72dxnyb/psycopg2/setup.py'"'"'; __file__='"'"'/private/var/folders/vh/0_hbs48171574k5y9pb97st80000gn/T/pip-install-y72dxnyb/psycopg2/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' bdist_wheel -d /private/var/folders/vh/0_hbs48171574k5y9pb97st80000gn/T/pip-wheel-51dm_zyp --python-tag cp37
cwd: /private/var/folders/vh/0_hbs48171574k5y9pb97st80000gn/T/pip-install-y72dxnyb/psycopg2/
Complete output (144 lines):
running bdist_wheel
running build
running build_py
creating build
creating build/lib.macosx-10.15-x86_64-3.7
creating build/lib.macosx-10.15-x86_64-3.7/psycopg2
copying lib/_json.py -> build/lib.macosx-10.15-x86_64-3.7/psycopg2
copying lib/extras.py -> build/lib.macosx-10.15-x86_64-3.7/psycopg2
copying lib/compat.py -> build/lib.macosx-10.15-x86_64-3.7/psycopg2
copying …