Python 尝试编写 cPickle 对象但收到“写入”属性类型错误
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原文地址: http://stackoverflow.com/questions/29127593/
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Trying to write a cPickle object but get a 'write' attribute type error
提问by Johnliquid
When trying to apply some code I found on the internet in iPython, it's coming up with an error:
当我尝试在 iPython 中应用我在互联网上找到的一些代码时，它出现了一个错误：
TypeError Traceback (most recent call last)
<ipython-input-4-36ec95de9a5d> in <module>()
13 all[i] = r.json()
14
---> 15 cPickle.dump(all, outfile)
TypeError: argument must have 'write' attribute
Here's what I have done in order:
这是我按顺序完成的操作：
outfile = "C:\John\Footy Bants\R COMPLAEX MATHS"
Then, I pasted in the following code:
然后，我粘贴了以下代码：
import requests, cPickle, shutil, time
all = {}
errorout = open("errors.log", "w")
for i in range(600):
playerurl = "http://fantasy.premierleague.com/web/api/elements/%s/"
r = requests.get(playerurl % i)
# skip non-existent players
if r.status_code != 200: continue
all[i] = r.json()
cPickle.dump(all, outfile)
Here's the original article to give you an idea of what I'm trying to achieve:
这是原始文章，让您了解我正在努力实现的目标：
回答by Martijn Pieters
The second argument to cPickle.dump()must be a file object. You passed in a string containing a filename instead.
的第二个参数cPickle.dump()必须是文件对象。您传入了一个包含文件名的字符串。
You need to use the open()function to open a file object for that filename, then pass the file object to cPickle:
您需要使用该open()函数为该文件名打开一个文件对象，然后将该文件对象传递给cPickle：
with open(outfile, 'wb') as pickle_file:
cPickle.dump(all, pickle_file)
See the Reading and Writing Filessectionof the Python tutorial, including why using withwhen opening a file is a good idea (it'll be closed for you automatically).
请参阅Python 教程的读取和写入文件部分，包括为什么with在打开文件时使用是个好主意（它会自动为您关闭）。
