import os

def remove_duplicate_env_vars(env_list):

"""

Removes duplicate environment variables from a list,

using default values for duplicates.

"""

unique_vars = {} # Use a dictionary to track unique variables

for var in env_list:

if var in unique_vars:

continue # Skip if already seen

else:

unique_vars[var] = os.getenv(var, "default_value") # Get value or default

return unique_vars

if __name__ == '__main__':

# Example usage:

# Simulate environment variables (replace with your actual list)

env_vars = ["API_KEY", "DEBUG", "API_KEY", "DATABASE_URL", "DEBUG", "PORT"]

cleaned_vars = remove_duplicate_env_vars(env_vars)

# Print the cleaned environment variables

for var, value in cleaned_vars.items():

print(f"{var}={value}")