首先我不是用brew安裝python3的，是用下載的python3.7.2的源碼然後自己編譯的。
一開始我用brew安裝的python3，pip總是報錯“ImportError: cannot import name HTTPSHandle”反正就是ssl方面的問題。網上找了一圈，說是ssl要先安裝，然後重新編譯python。
我去官網下載的源碼：https://www.python.org/downloads/source/
下載的tar.xz文件，然後自己解壓。
要先用brew安裝openssl和openssl-devel
命令： brew install openssl
brew install openssl-devel
然後
進入到解壓的python的目錄下
./configure --enable-shared --enable-loadable-sqlite-extensions
sudo make
sudo make install
-bash-3.2$ pip3 -V
pip 18.1 from /usr/local/lib/python3.7/site-packages/pip (python 3.7)
-bash-3.2$ python3
Python 3.7.2 (default, Jan 25 2019, 10:03:23)
[Clang 8.0.0 (clang-800.0.42.1)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import pymysql
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'pymysql'
>>> exit()
-bash-3.2$ pip3 install pymysql
Collecting pymysql
Downloading https://files.pythonhosted.org/packages/ed/39/15045ae46f2a123019aa968dfcba0396c161c20f855f11dea6796bcaae95/PyMySQL-0.9.3-py2.py3-none-any.whl (47kB)
100% |████████████████████████████████| 51kB 14kB/s
Installing collected packages: pymysql
Successfully installed pymysql-0.9.3
-bash-3.2$ python3
Python 3.7.2 (default, Jan 25 2019, 10:03:23)
[Clang 8.0.0 (clang-800.0.42.1)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import pymysql
>>> from xlwt import Workbook
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'xlwt'
>>> exit()
-bash-3.2$ pip3 install xlwt
Collecting xlwt
Downloading https://files.pythonhosted.org/packages/44/48/def306413b25c3d01753603b1a222a011b8621aed27cd7f89cbc27e6b0f4/xlwt-1.3.0-py2.py3-none-any.whl (99kB)
100% |████████████████████████████████| 102kB 96kB/s
Installing collected packages: xlwt
Successfully installed xlwt-1.3.0
-bash-3.2$ python3
Python 3.7.2 (default, Jan 25 2019, 10:03:23)
[Clang 8.0.0 (clang-800.0.42.1)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> from xlwt import Workbook
>>> exit
Use exit() or Ctrl-D (i.e. EOF) to exit
>>> exit()
-bash-3.2$