Python TypeError：预期的字符串或缓冲区
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Python TypeError: expected string or buffer
提问by Jetpylot
Need help. Have a list of data named arglist, example: ['dlink', 'des', '1210', 'c', 24] <-- this what "print" views.
需要帮忙。有一个名为 arglist 的数据列表，例如： ['dlink', 'des', '1210', 'c', 24] <-- 这就是“打印”视图。
And this code:
而这段代码：
sw_info ={"Brand":arglist[0],
"Model":arglist[1],
"Hardware":arglist[2],
"Software":arglist[3],
"Portsnum":arglist[4]}
print json.dumps(sw_info, open("test", "w"))
z = json.loads(open("test", "r"))
print s
It gives:
它给：
Traceback (most recent call last):
File "parsetest.py", line 34, in <module>
z = json.loads(open("test", "r"))
File "/usr/lib64/python2.6/site-packages/simplejson/__init__.py", line 307, in loads
return _default_decoder.decode(s)
File "/usr/lib64/python2.6/site-packages/simplejson/decoder.py", line 335, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
TypeError: expected string or buffer
Whats wrong?
怎么了？
采纳答案by Sven Festersen
You are trying to load a file object, when json.loads expects a string. You could either use
当 json.loads 需要一个字符串时，您正在尝试加载文件对象。你可以使用
z = json.loads(open("test", "r").read())
or, much better:
或者，更好：
with open("test") as f:
z = json.load(f)
In the first example, the file is opened, but never closed (bad practice). In the second example, the context manager closes the file after leaving the context block.
在第一个示例中，文件被打开，但从未关闭（不好的做法）。在第二个示例中，上下文管理器在离开上下文块后关闭文件。
