報錯信息：
(tyFinance) peng@pengdeMacBook-Pro tyFinance % pip install mysqlclient
Collecting mysqlclient
Using cached https://files.pythonhosted.org/packages/d0/97/7326248ac8d5049968bf4ec708a5d3d4806e412a42e74160d7f266a3e03a/mysqlclient-1.4.6.tar.gz
Installing collected packages: mysqlclient
Running setup.py install for mysqlclient ... error
Complete output from command /Users/peng/venv/tyFinance/bin/python -u -c "import setuptools, tokenize;__file__='/private/var/folders/lv/njqqwy4s25q8xkpfxr8v0rw80000gn/T/pip-install-bxh25nps/mysqlclient/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /private/var/folders/lv/njqqwy4s25q8xkpfxr8v0rw80000gn/T/pip-record-1sr_m6q1/install-record.txt --single-version-externally-managed --compile --install-headers /Users/peng/venv/tyFinance/include/site/python3.8/mysqlclient:
running install
running build
running build_py
creating build
creating build/lib.macosx-10.9-x86_64-3.8
creating build/lib.macosx-10.9-x86_64-3.8/MySQLdb
copying MySQLdb/__init__.py -> build/lib.macosx-10.9-x86_64-3.8/MySQLdb
copying MySQLdb/_exceptions.py -> build/lib.macosx-10.9-x86_64-3.8/MySQLdb
copying MySQLdb/compat.py -> build/lib.macosx-10.9-x86_64-3.8/MySQLdb
copying MySQLdb/connections.py -> build/lib.macosx-10.9-x86_64-3.8/MySQLdb
copying MySQLdb/converters.py -> build/lib.macosx-10.9-x86_64-3.8/MySQLdb
copying MySQLdb/cursors.py -> build/lib.macosx-10.9-x86_64-3.8/MySQLdb
copying MySQLdb/release.py -> build/lib.macosx-10.9-x86_64-3.8/MySQLdb
copying MySQLdb/times.py -> build/lib.macosx-10.9-x86_64-3.8/MySQLdb
creating build/lib.macosx-10.9-x86_64-3.8/MySQLdb/constants
copying MySQLdb/constants/__init__.py -> build/lib.macosx-10.9-x86_64-3.8/MySQLdb/constants
copying MySQLdb/constants/CLIENT.py -> build/lib.macosx-10.9-x86_64-3.8/MySQLdb/constants
copying MySQLdb/constants/CR.py -> build/lib.macosx-10.9-x86_64-3.8/MySQLdb/constants
copying MySQLdb/constants/ER.py -> build/lib.macosx-10.9-x86_64-3.8/MySQLdb/constants
copying MySQLdb/constants/FIELD_TYPE.py -> build/lib.macosx-10.9-x86_64-3.8/MySQLdb/constants
copying MySQLdb/constants/FLAG.py -> build/lib.macosx-10.9-x86_64-3.8/MySQLdb/constants
running build_ext
building 'MySQLdb._mysql' extension
creating build/temp.macosx-10.9-x86_64-3.8
creating build/temp.macosx-10.9-x86_64-3.8/MySQLdb
gcc -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -arch x86_64 -g -Dversion_info=(1,4,6,'final',0) -D__version__=1.4.6 -I/usr/local/opt/mysql-client/include/mysql -I/Users/peng/venv/tyFinance/include -I/Library/Frameworks/Python.framework/Versions/3.8/include/python3.8 -c MySQLdb/_mysql.c -o build/temp.macosx-10.9-x86_64-3.8/MySQLdb/_mysql.o
gcc -bundle -undefined dynamic_lookup -arch x86_64 -g build/temp.macosx-10.9-x86_64-3.8/MySQLdb/_mysql.o -L/usr/local/opt/mysql-client/lib -lmysqlclient -lssl -lcrypto -o build/lib.macosx-10.9-x86_64-3.8/MySQLdb/_mysql.cpython-38-darwin.so
ld: library not found for -lssl
clang: error: linker command failed with exit code 1 (use -v to see invocation)
error: command 'gcc' failed with exit status 1
----------------------------------------
Command "/Users/peng/venv/tyFinance/bin/python -u -c "import setuptools, tokenize;__file__='/private/var/folders/lv/njqqwy4s25q8xkpfxr8v0rw80000gn/T/pip-install-bxh25nps/mysqlclient/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /private/var/folders/lv/njqqwy4s25q8xkpfxr8v0rw80000gn/T/pip-record-1sr_m6q1/install-record.txt --single-version-externally-managed --compile --install-headers /Users/peng/venv/tyFinance/include/site/python3.8/mysqlclient" failed with error code 1 in /private/var/folders/lv/njqqwy4s25q8xkpfxr8v0rw80000gn/T/pip-install-bxh25nps/mysqlclient/
解決：
(tyFinance) peng@pengdeMacBook-Pro tyFinance % LDFLAGS=-L/usr/local/opt/openssl/lib pip3 install mysqlclient
Collecting mysqlclient
Using cached https://files.pythonhosted.org/packages/d0/97/7326248ac8d5049968bf4ec708a5d3d4806e412a42e74160d7f266a3e03a/mysqlclient-1.4.6.tar.gz
Installing collected packages: mysqlclient
Running setup.py install for mysqlclient ... done
Successfully installed mysqlclient-1.4.6