OSX 上的 psycopg2 没有安装 pip

Question

There are a few problems asked about installing psycopg2 on OSX.

Like:

• Error with library
• Error with compiler
• Import error with library
• Missing pg_conf

After sorting out pg_conf still stuck with library not found for -lssl

On:

• OSX
• M1 Mac
• Python 3.9

Answer 1

After finding this solution , was able to make it work without needing the whole of postgres installed, by using brew .

Sadly zlib or openssl are not explained in the install requirements for psycopg2

Verified with:

• OSX: Monterey 12.4
• Python: 3.9.13
• pip: 22.1.2
• psycopg2: 2.8.5

Steps:

• Install libpq: brew install libpq

• Add to path, so pg_conf is found, eg:

   export PATH=/opt/homebrew/opt/libpq/bin:$PATH

• Install openssl: brew install openssl

• Add to library paths, eg:

   export LDFLAGS="-L/opt/homebrew/opt/openssl@3/lib" export CPPFLAGS="-I/opt/homebrew/opt/openssl@3/include"

• pip install psycopg2==2.8.5