尝试安装psycopg2 pip install psycopg2时出现错误
我不知道我是否有pg_config或没有.我试图找出在哪里是pg_config，psql.但我不明白为什么pg_config是不是在系统中，当我安装PostgreSQL（11.4）.如果它是在系统中如何设置路径，使psycopg2安装是可能的.

(myvenv) [jpsofficedev@localhost djangogirls]$ postgres --version
postgres (PostgreSQL) 11.4
(myvenv) [jpsofficedev@localhost djangogirls]$ echo $PATH
/home/jpsofficedev/Documents/coding_for_girls/djangogirls/myvenv/bin:/home/jpsofficedev/.local/bin:/home/jpsofficedev/bin:/usr/share/Modules/bin:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/var/lib/snapd/snap/bin:/Library/PostgreSQL/11.4/bin
(myvenv) [jpsofficedev@localhost djangogirls]$ which psql
/usr/bin/psql
(myvenv) [jpsofficedev@localhost djangogirls]$ which pg_config
/usr/bin/which: no pg_config in (/home/jpsofficedev/Documents/coding_for_girls/djangogirls/myvenv/bin:/home/jpsofficedev/.local/bin:/home/jpsofficedev/bin:/usr/share/Modules/bin:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/var/lib/snapd/snap/bin:/Library/PostgreSQL/11.4/bin)

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