Python os.walk（）失败

Question

I have created a script to give me the list of files in a folder directory. Yet, I am occasionally getting this error. What does this mean?

portion of the error:

Script failed due to an error:
Traceback (most recent call last):
  File "<script>", line 12, in <module>
  File "C:\Program Files\Nuix\Nuix 6\lib\jython.jar\Lib\os.py", line 309, in walk
  File "C:\Program Files\Nuix\Nuix 6\lib\jython.jar\Lib\os.py", line 299, in walk
  File "C:\Program Files\Nuix\Nuix 6\lib\jython.jar\Lib\genericpath.py", line 41, in isdir
  File "C:\Program Files\Nuix\Nuix 6\lib\jython.jar\Lib\genericpath.py", line 41, in isdir
java.lang.AbstractMethodError: org.python.modules.posix.PythonPOSIXHandler.error(Ljnr/constants/platform/Errno;Ljava/lang/String;Ljava/lang/String;)V

    at jnr.posix.BaseNativePOSIX.stat(BaseNativePOSIX.java:309)

    at jnr.posix.CheckedPOSIX.stat(CheckedPOSIX.java:265)

    at jnr.posix.LazyPOSIX.stat(LazyPOSIX.java:267)

The script:

import os
import codecs
import shutil
import datetime
import sys


exportpath = 'P:/Output/Export7/{6136BAF2-85BA-4E64-8C11-A2C59398FC02}/'
tempnativefolder = 'NATIVESOrig'


for dir, sub, file in os.walk(exportpath + tempnativefolder):
  for fname in file:
    #source path
    source = os.path.join(dir, fname).replace('\\', '/')
    print source


print("Natives moved to subfolders")

Answer 1

I found out that the presence of these characters(see "diamond with question mark" character in screenshot) in the file name causes the issue. Once I replaced those, my script works. thanks so much.

Answer 2

What the error means: AbstractMethodError means that some code tried to call a method which was not implemented.

PythonPOSIXHandler implements jnr.posix.POSIXHandler . JRuby also uses JNR and the interface is subtly different between the two. JRuby's newer copy of JNR has that one additional #error(Errno, String, String) method and Jython's implementation lacks that method, because it's compiled against the interface when the method didn't exist.

I usually see this problem in the other direction - where stuff in Jython's jar breaks JRuby. I assume it entirely depends on the order of the jars in the classpath.