如何修复错误“错误：命令错误，退出状态1：python。” 尝试使用pip安装django-heroku时

我正在尝试使用pip安装django-heroku，但它始终会遇到错误。

我已经看到建议告诉我确保我在heroku中的python版本是最新的建议。我已经做到了。推送到heroku master之后，我运行了install命令，但它给了我以下错误。

pip install django-heroku

错误：

 ERROR: Command errored out with exit status 1:
 command: /Users/user/Dev/trydjango/new_env/bin/python -c 'import 
 sys, setuptools, tokenize; sys.argv[0] = 
 '"'"'/private/var/folders/xl/s533dc515qs8sd3tpg7y5ty80000gp/T/pip- 
 install-xqsix26g/psycopg2/setup.py'"'"'; 

egg_info --egg-base pip-egg-info
     cwd: 
/private/var/folders/xl/s533dc515qs8sd3tpg7y5ty80000gp/T/pip- 
install-xqsix26g/psycopg2/
Complete output (23 lines):
running egg_info
creating pip-egg-info/psycopg2.egg-info
writing pip-egg-info/psycopg2.egg-info/PKG-INFO
writing dependency_links to pip-egg-info/psycopg2.egg- 
info/dependency_links.txt
writing top-level names to pip-egg-info/psycopg2.egg- 
info/top_level.txt
writing manifest file 'pip-egg-info/psycopg2.egg-info/SOURCES.txt'

Error: pg_config executable not found.

pg_config is required to build psycopg2 from source.  Please add t .   he directory
containing pg_config to the $PATH or specify the full executable 
path with the
option:

    python setup.py build_ext --pg-config /path/to/pg_config build ...

or with the pg_config option in 'setup.cfg'.

If you prefer to avoid building psycopg2 from source, please 
install the PyPI
'psycopg2-binary' package instead.

For further information please check the 'doc/src/install.rst' file 
(also at
<http://initd.org/psycopg/docs/install.html>).

----------------------------------------
ERROR: Command errored out with exit status 1: python setup.py 
egg_info Check the logs for full command output.