为什么字典中没有属性'__getitem__'错误？

Question

为什么我没有__getitem__字典的属性错误:

Traceback (most recent call last):
  File "./thumbnail.py", line 39, in <module>
    main()
  File "./thumbnail.py", line 19, in main
    options['input_pattern']
AttributeError: Values instance has no attribute '__getitem__'

这是代码:

#!/usr/bin/env python

import os, sys, glob
from PIL import Image
from optparse import OptionParser

def batch_convert(src_dir, input_pattern, output_ext = None, dest_dir = None):
    return 0

def main():
    print sys.argv
    parser = OptionParser()
    parser.add_option("-s", "--source-dir", dest="src_dir", help="Source directory to fetch images")
    parser.add_option("-d", "--dest-dir", dest="dest_dir", help="Destination directory to writen processed images")
    parser.add_option("-i", "--input-pattern", dest="input_pattern", help="Look for files that match some pattern. E.g. *.png or pic*cool*")
    parser.add_option("-o", "--output-format", dest="output_ext", help="Output format to save all images. If empty, original format of images is preserved")
    (options, args) = parser.parse_args()
    print options
    options['input_pattern']

if __name__ == "__main__":
    main()

Answer 1

options 不是一个字典:

print options.input_pattern

Answer 2

如果你必须有一个字典,请使用

options.__dict__