Get environment variables in Python, otherwise set default values

Overview

When using python, if there is an environment variable, I want to set its value, if not, the default value

Conclusion

Access environment variables from Python

import os

url = os.getenv("YOUR_URL", "http://qiita.com")
print(url)

os.environ.get

os.environ is like a map, so




## When trying with docker


$ docker run -v $PWD:/work --rm python:2.7.12 python /work/sample.py http://qiita.com $ docker run -e YOUR_URL="http://127.0.0.1" -v $PWD:/work --rm python:2.7.12 python /work/sample.py http://127.0.0.1




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