从 python 执行受密码保护的 psql

Question

I need to execute the following command from Python on Windows :

psql -h localhost -p 5432 -U postgres -f script.sql db_name

The above script works fine when ran from git bash / powershell. After entering the script in a terminal, I need to provide a password to confirm it (similar to when using sudo ).

How can I do that? I keep finding solutions that I think are linux-based.

How do I do it on Windows? I have tried many variations of solutions involving subprocess , ie:

import subprocess

p2 = subprocess.Popen(
    'psql -h localhost -p 5432 -U postgres -f script.sql db_name',
    stdin=subprocess.PIPE,
    stderr=subprocess.PIPE,
    universal_newlines=True)

print('this will print')
sudo_prompt = p2.communicate('THE_PASSWORD' + '\n')[1]
print('this will not')

Answer 1

A better option (more secure) than invoking psql with explicit mention of your password is to have a .pgpass file as described in the docs file (and keep it protected eg chmod 600 ~/.pgpass ). This keeps your password out of the list of running processes.

On Windows:

On Microsoft Windows the file is named %APPDATA%\postgresql\pgpass.conf (where %APPDATA% refers to the Application Data subdirectory in the user's profile).