postgresql 10免安装版pgAdmin 4无法启动的问题：PostgreSQL pgadmin4 the application server could not be contacted
2018-04-06 00:00
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创建：pg目录/pgAdmin 4/venv/Lib/site-packages/backports/__init__.py
0字节的空文件，创建一个即可，然后pgAdmin就能正常工作了！
亲测可用。希望对你有帮助。
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