ValueError:未知url类型:sklearn中出现0.0错误

Question

我有一个简单的脚本，试图将csv数据文件转换为工具svm_light可以接受的形式。这是代码：

    import csv
import sys
import numpy as np
from sklearn.cross_validation import train_test_split
def svm_light_conversion(row):
    conv_row = row[len(row) - 1] + ' '
    for i in xrange(len(row) - 1):
        conv_row = conv_row + str(i + 1) + ':' + str(row[i]) + ' '
    return conv_row
def reaData(inputfile):
    with open(inputfile, 'r') as inFile: 
        reader = csv.reader(inFile)
        my_content = list(reader)
    my_content = my_content[0:len(my_content) - 1]
    return my_content
def converToSVMLiteFormat(outputfile, train, test):
    train_file = outputfile + '_train.dat'
    test_file = outputfile + '_test.dat'
    #svm_light conversion for training data
    with open(train_file, 'wb') as txtfile:
        for i in xrange(len(train)):
            converted_row = svm_light_conversion(train[i]) + 'n'
            txtfile.write(converted_row)
    txtfile.close()
    #svm_light conversion for test data#
    with open(test_file, 'wb') as txtfile:
        for i in xrange(len(test)):
            converted_row = svm_light_conversion(test[i]) + 'n'
            txtfile.write(converted_row)
    txtfile.close()

def main():
    inputfile = sys.argv[1]
    outputfile = sys.argv[2]
    content = reaData(inputfile)
    train, test = train_test_split(content, train_size = 0.8) #split data
    converToSVMLiteFormat(outputfile, train, test)

if __name__ == "__main__":
    main()

它以前工作得很好，但现在突然出现了错误：

(env)fieldsofgold@fieldsofgold-VirtualBox:~/new$ python prac.py data.csv outt
Traceback (most recent call last):
  File "prac.py", line 4, in <module>
    from sklearn.cross_validation import train_test_split
  File "/home/fieldsofgold/new/env/local/lib/python2.7/site-packages/sklearn/cross_validation.py", line 32, in <module>
    from .metrics.scorer import check_scoring
  File "/home/fieldsofgold/new/env/local/lib/python2.7/site-packages/sklearn/metrics/__init__.py", line 7, in <module>
    from .ranking import auc
  File "/home/fieldsofgold/new/env/local/lib/python2.7/site-packages/sklearn/metrics/ranking.py", line 30, in <module>
    from ..utils.stats import rankdata
  File "/home/fieldsofgold/new/env/local/lib/python2.7/site-packages/sklearn/utils/stats.py", line 2, in <module>
    from scipy.stats import rankdata as _sp_rankdata
  File "/home/fieldsofgold/new/env/local/lib/python2.7/site-packages/scipy/stats/__init__.py", line 338, in <module>
    from .stats import *
  File "/home/fieldsofgold/new/env/local/lib/python2.7/site-packages/scipy/stats/stats.py", line 189, in <module>
    from . import distributions
  File "/home/fieldsofgold/new/env/local/lib/python2.7/site-packages/scipy/stats/distributions.py", line 10, in <module>
    from ._distn_infrastructure import (entropy, rv_discrete, rv_continuous,
  File "/home/fieldsofgold/new/env/local/lib/python2.7/site-packages/scipy/stats/_distn_infrastructure.py", line 44, in <module>
    from new import instancemethod
  File "/home/fieldsofgold/new/new.py", line 10, in <module>
    response2 = urllib2.urlopen(row[12])
  File "/usr/lib/python2.7/urllib2.py", line 127, in urlopen
    return _opener.open(url, data, timeout)
  File "/usr/lib/python2.7/urllib2.py", line 396, in open
    protocol = req.get_type()
  File "/usr/lib/python2.7/urllib2.py", line 258, in get_type
    raise ValueError, "unknown url type: %s" % self.__original
ValueError: unknown url type: 0.0

有人能帮我分析一下错误吗？这个错误似乎发生在sklearn的某个地方，但我不完全理解可能出了什么问题。谢谢

Answer 1

如果按照回溯，从文件中的行

from sklearn.cross_validation import train_test_split

你创造了一连串的进口。但如果你稍后在回溯中阅读，你会看到这个

    from new import instancemethod
  File "/home/fieldsofgold/new/new.py", line 10, in <module>

Python中有一个模块，叫做new.py。但是，您还在当前目录中创建了一个名为new.py的模块。由于导入的优先级，Python将首先在当前工作目录中查找模块。表示，如果找不到，它将尝试其他地方

>>> import sys
>>> sys.path

所以基本上Python导入了错误的new.py，这一切都像滚雪球一样。为了避免这个问题，只需将new文件夹和new.py文件重命名为其他文件即可。此外，请确保删除已创建的new.pyc文件，因为它的存在足以尝试从那里导入。

对于好奇的人来说，这是文件的内容，位于/Windows上的Python27/Lib/。

"""Create new objects of various types.  Deprecated.
This module is no longer required except for backward compatibility.
Objects of most types can now be created by calling the type object.
"""
from warnings import warnpy3k
warnpy3k("The 'new' module has been removed in Python 3.0; use the 'types' "
            "module instead.", stacklevel=2)
del warnpy3k
from types import ClassType as classobj
from types import FunctionType as function
from types import InstanceType as instance
from types import MethodType as instancemethod
from types import ModuleType as module
from types import CodeType as code