Python"IOError:[Errno 22]无效的参数"使用cPickle将大型阵列写入网络驱动器时 [英] Python "IOError: [Errno 22] Invalid argument" when using cPickle to write large array to network drive
问题描述
在塞巴斯蒂安·J·F·塞巴斯蒂安(J. F. Sebastian)的建议下，我可以更简单地得到相同的错误:
At the suggestion of J. F. Sebastian, I can get the same error much more simply:
Python 2.6.4 (r264:75708, Oct 26 2009, 08:23:19) [MSC v.1500 32 bit (Intel)]
Type "copyright", "credits" or "license" for more information.
IPython 0.10 -- An enhanced Interactive Python.
? -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help -> Python's own help system.
object? -> Details about 'object'. ?object also works, ?? prints more.
Welcome to pylab, a matplotlib-based Python environment.
For more information, type 'help(pylab)'.
In [1]: open(r'c:\test.bin', 'wb').write('a'*67076095)
In [2]: open(r'c:\test.bin', 'wb').write('a'*67076096)
In [3]: open(r'z:\test.bin', 'wb').write('a'*67076095)
In [4]: open(r'z:\test.bin', 'wb').write('a'*67076096)
---------------------------------------------------------------------------
IOError Traceback (most recent call last)
C:\Documents and Settings\User\<ipython console> in <module>()
IOError: [Errno 22] Invalid argument
In [5]:
请注意，C:是本地驱动器，Z:是网络驱动器.
Note that C: is a local drive, and Z: is a network drive.
原始问题:
如果我使用cPickle将大于〜67 MB的文件写入我们的网络驱动器(ReadyNAS Pro Pioneer版)，则Windows XP上的Python 2.6.4崩溃.我希望能够腌制大文件.这是一个已知问题吗?有解决方法吗?
Python 2.6.4 on Windows XP crashes if I use cPickle to write a file bigger than ~67 MB to our network drive (ReadyNAS Pro Pioneer edition). I'd like to be able to pickle large files. Is this a known problem? Is there a workaround?
以下脚本会导致崩溃:
import cPickle, numpy
a = numpy.zeros(8385007)
print "Writing %i bytes..."%(a.nbytes)
cPickle.dump(a, open('test_a.pkl', 'wb'), protocol=2)
print "Successfully written."
b = numpy.zeros(8385008)
print "Writing %i bytes..."%(b.nbytes)
cPickle.dump(b, open('test_b.pkl', 'wb'), protocol=2) ##Crashes on a network drive
print "Successfully written." ##Doesn't crash on a non-network drive
以下是在ipython提示符下产生崩溃的步骤:
Here's the steps I take to produce a crash at the ipython prompt:
Python 2.6.4 (r264:75708, Oct 26 2009, 08:23:19) [MSC v.1500 32 bit (Intel)]
Type "copyright", "credits" or "license" for more information.
IPython 0.10 -- An enhanced Interactive Python.
? -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help -> Python's own help system.
object? -> Details about 'object'. ?object also works, ?? prints more.
Welcome to pylab, a matplotlib-based Python environment.
For more information, type 'help(pylab)'.
In [1]: pwd
Out[1]: 'C:\\Documents and Settings\\User'
In [2]: run test
Writing 67080056 bytes...
Successfully written.
Writing 67080064 bytes...
Successfully written.
In [3]: cd Z:
Z:\
In [4]: pwd
Out[4]: 'Z:\\'
In [5]: run 'C:\\Documents and Settings\\User\\test'
Writing 67080056 bytes...
Successfully written.
Writing 67080064 bytes...
---------------------------------------------------------------------------
IOError Traceback (most recent call last)
C:\Documents and Settings\User\test.py in <module>()
8 b = numpy.zeros(8385008)
9 print "Writing %i bytes..."%(b.nbytes)
---> 10 cPickle.dump(b, open('test_b.pkl', 'wb'), protocol=2)
11 print "Successfully written."
12
IOError: [Errno 22] Invalid argument
WARNING: Failure executing file: <C:\\Documents and Settings\\User\\test.py>
In [6]:
C:是计算机上的本地硬盘驱动器. Z:是我们的网络附加存储.
C: is the local hard drive on the machine. Z: is our network-attached storage.
推荐答案
我认为该问题与以下方面有关: http://support.microsoft.com/default.aspx?scid = kb; zh-CN; 899149
I believe the problem is related to: http://support.microsoft.com/default.aspx?scid=kb;en-us;899149
...所以，只需尝试: 打开(r'z:\ test.bin'，'w + b').write('a'* 67080064)
...so, just try: open(r'z:\test.bin','w+b').write('a'*67080064)
*请注意参数:"w + b"
*Note the argument: 'w+b'
这篇关于Python"IOError:[Errno 22]无效的参数"使用cPickle将大型阵列写入网络驱动器时的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
