D:\stuff\python\trace>python trace.py --ignore-dir='$prefix' -t test.py 
 --- modulename: test, funcname: <module>
test.py(1): import os
test.py(3): os.getenv('PATH')
 --- modulename: os, funcname: getenv
os.py(513):     return environ.get(key, default)
 --- modulename: os, funcname: get
os.py(445):                 return self.data.get(key.upper(), failobj)
 --- modulename: trace, funcname: _unsettrace
trace.py(80):         sys.settrace(None)



D:\stuff\python\trace>python trace.py --ignore-dir=C:\Python26\Lib -t test.py 
 --- modulename: test, funcname: <module>
test.py(1): import os
test.py(3): os.getenv('PATH')
 --- modulename: os, funcname: getenv
os.py(513):     return environ.get(key, default)
 --- modulename: os, funcname: get
os.py(445):                 return self.data.get(key.upper(), failobj)
 --- modulename: trace, funcname: _unsettrace
trace.py(80):         sys.settrace(None)



D:\stuff\python\trace>python trace.py --ignore-dir=c:\python26\lib -t test.py 
 --- modulename: test, funcname: <module>
test.py(1): import os
test.py(3): os.getenv('PATH')
 --- modulename: trace, funcname: _unsettrace
trace.py(80):         sys.settrace(None)