Can't install psycopg2 package through pip install… Is this because of Sierra?

Question

I am working on a project for one of my lectures and I need to download the package psycopg2 in order to work with the postgresql database in use. Unfortunately, when I try

Answer 1

In case you don't want to faff around with brew, here's the "MacOS-only solution":

sudo installer -pkg /Library/Developer/CommandLineTools/Packages/macOS_SDK_headers_for_macOS_10.14.pkg -target /

After this, pip will gladly install psycopg2 from the source. Works with "Mojave" (macOS 10.14).

Answer 2

Old, but for folks using pipenv, I resolved this issue by looking at my dependency graph pipenv graph --reverse and noticing it required psycopg2-binary==2.8.2. Running pipenv install psycopg2-binary resolved the issue.

Answer 3

Running into a similar problem using pipenv install psycopg2:

ld: library not found for -lssl', ' clang: error: linker command failed with exit code 1 (use -v to see invocation)', " error: command 'clang' failed with exit status 1", '
----------------------------------------',

I tried all of the recommendations above and none of them worked. I'd faced this problem in another virtualenv a few months ago and remembered reading something about this being a psycopg2 version issue. So I tried installing with 2.7.1 and 2.8.3 and both still failed. Somehow version 2.7.7 worked:

pipenv install psycopg2==2.7.7

Wish I had time to look into this further to understand what's really happening. But for now I don't and this worked.

Answer 4

try this -->pip install psycopg2-binary

Answer 5

1. Install/update Xcode developer tools

   xcode-select --install
   

2. Query postgres path

   find / -name pg_config  2>/dev/null
   

3. Install psycopg2, use the path you got in step 2. Mine was '/usr/local/Cellar/postgresql/9.5.0/bin/pg_config'

   PATH=$PATH:/usr/local/Cellar/postgresql/9.5.0/bin/ pip install psycopg2
   

Answer 6

brew install postgresql

If postgresql exist then run:

brew upgrade postgresql
sudo pip install psycopg2

In venv:

env LDFLAGS='-L/usr/local/lib -L/usr/local/opt/openssl/lib -L/usr/local/opt/readline/lib' pip install psycopg2==2.8.4

If you need use only the command pip install psycopg2 export the path in macOSX:

export LDFLAGS="-I/usr/local/opt/openssl/include -L/usr/local/opt/openssl/lib"