如何从Python中的Shell脚本导入变量？

Question

I have a Shell script, lets call it file.sh , that identifies a variable LOGFILE . I am trying to run a Python script calling the same variable, however it is not exporting properly.

I tried:

import os
print(os.environ(LOGFILE))

and got this error: name 'LOGFILE' is not defined

They are in the same directory, so I am not sure what the error is? How can I fix this?

Answer 1

The environment variable is not directly accessible as python variable. This is why you need to pass the name of the external environment-variable in the form of a string. Furthermore, environ is not a function, it is a dictionary, so you need to use square brackets to lookup 'LOGFILE' in the dictionary:

print(os.environ['LOGFILE'])

If you want a function that does something similar, use os.getenv()

print(os.getenv('LOGFILE'))