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我在学习使用Python和scikit学习和执行的代码（最初是从http://scikit-learn.org/stable/auto_examples/document_classification_20newsgroups.html#example-document-classification-20newsgroups-py）以下块IPython的笔记本电脑（使用Python 2.7）：SystemExit：2的错误调用parse_args（）在IPython的笔记本时
from __future__ import print_function
from optparse import OptionParser
# parse commandline arguments
op = OptionParser()
op.add_option("--report",
action="store_true", dest="print_report",
help="Print a detailed classification report.")
op.add_option("--chi2_select",
action="store", type="int", dest="select_chi2",
help="Select some number of features using a chi-squared test")
op.add_option("--confusion_matrix",
action="store_true", dest="print_cm",
help="Print the confusion matrix.")
op.add_option("--top10",
action="store_true", dest="print_top10",
help="Print ten most discriminative terms per class"
" for every classifier.")
op.add_option("--all_categories",
action="store_true", dest="all_categories",
help="Whether to use all categories or not.")
op.add_option("--use_hashing",
action="store_true",
help="Use a hashing vectorizer.")
op.add_option("--n_features",
action="store", type=int, default=2 ** 16,
help="n_features when using the hashing vectorizer.")
op.add_option("--filtered",
action="store_true",
help="Remove newsgroup information that is easily overfit: "
"headers, signatures, and quoting.")
(opts, args) = op.parse_args()
if len(args) > 0:
op.error("this script takes no arguments.")
sys.exit(1)
在运行代码，我遇到下列错误：
An exception has occurred, use %tb to see the full traceback.
SystemExit: 2
Usage: -c [options]
-c: error: no such option: -f
To exit: use 'exit', 'quit', or Ctrl-D.
我跟着指令并执行％TB，和下面出现：
---------------------------------------------------------------------------
SystemExit Traceback (most recent call last)
<ipython-input-1-d44fadf3a28b> in <module>()
37 "headers, signatures, and quoting.")
38
---> 39 (opts, args) = op.parse_args()
40 if len(args) > 0:
41 op.error("this script takes no arguments.")
C:\Anaconda\lib\optparse.pyc in parse_args(self, args, values)
1399 stop = self._process_args(largs, rargs, values)
1400 except (BadOptionError, OptionValueError), err:
-> 1401 self.error(str(err))
1402
1403 args = largs + rargs
C:\Anaconda\lib\optparse.pyc in error(self, msg)
1581 """
1582 self.print_usage(sys.stderr)
-> 1583 self.exit(2, "%s: error: %s\n" % (self.get_prog_name(), msg))
1584
1585 def get_usage(self):
C:\Anaconda\lib\optparse.pyc in exit(self, status, msg)
1571 if msg:
1572 sys.stderr.write(msg)
-> 1573 sys.exit(status)
1574
1575 def error(self, msg):
SystemExit: 2
据我所知，optparse已被弃用，以支持argparse，但由于我想逐块理解教程，我希望能够在iPython笔记本中运行代码以了解其工作原理。似乎someone else had this problem previously，但没有提出解决方案。
有没有办法解决这个错误，所以我可以从iPython笔记本内运行教程代码？
的可能的复制[SystemExit：2错误调用解析\ _args（）时（http://stackoverflow.com/questions/42249982/systemexit-2-error-when-calling-parse-args ） – daphtdazz
在我的情况下，我的代码在其他IDE（同一台计算机）和另一台计算机上的Jupyter笔记本上工作 – user3226167