1、問題描述： Python3.6連接Impala的No module named _ssl
Python2是沒有這個問題的
>>> from impala.dbapi import connect
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/python36/lib/python3.6/ssl.py", line 60, in <module>
import _ssl
ImportError: No module named _ssl
>>>
2、解決方案
a 安裝python3依賴的openssl-devel包
Linux：
RedHat系列： RedHat、Centos、Fedora
> yum install openssl-devel
PS： 安裝工具—— rpm、yum、tar
Debian系列：Debian、Ubuntu
> sudo apt-get install openssl
> sudo apt-get install libssl-dev
PS： 安裝工具—— apt-get、dpkg、tar
b 修改python3.6源碼
#修改Setup文件
> vi Python-3.6.5/Modules/Setup.dist
206 # CSV file helper
207 #_csv _csv.c
208
209 # Socket module helper for socket(2)
210 _socket socketmodule.c
211
212 # Socket module helper for SSL support; you must comment out the other
213 # socket line above, and possibly edit the SSL variable:
214 #SSL=/usr/local/ssl
215 _ssl _ssl.c \
216 -DUSE_SSL -I$(SSL)/include -I$(SSL)/include/openssl \
217 -L$(SSL)/lib -lssl -lcrypto
218
219 # The crypt module is now disabled by default because it breaks builds
220 # on many systems (where -lcrypt is needed), e.g. Linux (I believe).
221 #
222 # First, look at Setup.config; configure may have set this for you.
223
224 #crypt cryptmodule.c # -lcrypt # crypt(3); needs -lcrypt on some systems
c 重新編譯
> cd ./Python-3.6.5
> ./configure
> make
> make install
d 解決
>>> from impala.dbapi import connect
ok
3、參考文獻：
python3安裝過程中出現的ssl問題No module named _ssl： https://blog.csdn.net/chief_victo/article/details/80425431Compiling
Python with SSL Support： http://www.webtop.com.au/blog/compiling-python-with-ssl-support-fedora-10-2009020237
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python2在安裝impyla時，依賴包bitarray、thrift，有時候會報： bitarray error: command 'x86_64-linux-gnu-gcc' failed with exit status 1
需要apt-get install python-dev可以解決，同時python2下，安裝pip install thrift ==0.9.3