Installing Psycopg2 and Resolving "pg_config executable not found" Error
When attempting to install psycopg2 via pip, users may encounter the "pg_config executable not found" error. Despite confirming the presence of pg_config in the PATH, the installation process fails.
One possible solution is to ensure that the correct development package is installed. On RHEL 5.5, the required package is postgresql-devel. For other distributions, it may be libpq-dev (Debian/Ubuntu) or libpq-devel (Centos/Fedora/Cygwin/Babun).
By installing the appropriate development package, the pg_config executable will be added to the system's path, resolving the "executable not found" error. Additionally, it's advisable to verify that the pg_config file is indeed located in the specified directory using the which command.
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