Unexpected Behavior when Parsing Duplicate Key

[wg99]

Hello. I started using this package yesterday and I am sorry if I am missing something simple.
I am trying to read an env file that looks like this:

export hello=hi
export greetings=${hello}
export goodbye=bye
export greetings=${goodbye}

To read it, I wrote the following small program:

import os
import dotenv
from pathlib import Path

env_path = './test.env'
dotenv.load_dotenv(dotenv_path=env_path,verbose=True)
print(os.getenv('greetings'))

When I run this program, it outputs a single empty line. This happens even when I set override to True. I was expecting the program to output 'bye'. Is this a bug or the expected behavior for handling duplicate keys ? I am currently running 3.7.3 and python-dotenv version 0.10.3. Thank you.

[wg99]

Quick update. I just tried the program again with the following env file:

export hello=hi
export goodbye=bye
export greetings=${hello}
export greetings=${goodbye}

This time, my program output 'bye'.

I am not sure why changing the order allowed greetings to be resolved correctly but I thought that I should include this information.

[bbc2]

I can reproduce this issue. Your program should indeed print "bye".

[bbc2]

I've created an MR (#260) with a fix for the issue your reported. If you want you can try it and let me know if it works for you. Otherwise I'll just go ahead and merge it.