I have a Python 2.7 script that takes command line arguments. I am trying to implement it in a PythonCaller but it doesn't seem to recognize "feature.getAttribute". I'm getting this error "Python Exception <NameError>: name 'feature' is not def

You'll have to either use the expected method or the class interface, see https://community.safe.com/s/article/pythoncaller-transformer

Basically, your code should look something like:

import fme
import fmeobjects
 
def my_feature_processor(feature):
   # Script parameters
   inputLayer = feature.getAttribute('inputLayer')
   outputLocation = feature.getAttribute('outputLocation')
   outputName = feature.getAttribute('outputName')

You then have to tell the PythonCaller that your entry point is "my_feature_processor"