Interesting problem, John.
I have probably even less experience with json than you do, so I'm
taking this as an opportunity to learn with you.
Suggestions:
1. Try your example with Python 2 rather than Python 3.
2. Take your file and make it into a string literal in your program, and
try calling json.loads with that as an argument.
Share with us what happens!
Good luck,
Bill
john polo wrote:
Greetings,
I am using IPython 6.1.0 with Python 3.6.2 on a Windows 7 machine. I
am not a programmer. I am using a book called Python Data Analytics to
try to learn some of Python. I am at a section for reading and writing
JSON data. The example JSON file is:
Listing 5-13. books.json
[{"writer": "Mark Ross",
"nationality": "USA",
"books": [
{"title": "XML Cookbook", "price": 23.56},
{"title": "Python Fundamentals", "price": 50.70},
{"title": "The NumPy library", "price": 12.30}
]
},
{"writer": "Barbara Bracket",
"nationality": "UK",
"books": [
{"title": "Java Enterprise", "price": 28.60},
{"title": "HTML5", "price": 31.35},
{"title": "Python for Dummies", "price": 28.00}
]
}]
and the example code for reading the file is:
>>> file = open('books.json','r')
>>> text = file.read()
>>> text = json.loads(text)
When I use those 3 lines, I get the following:
JSONDecodeError Traceback (most recent call
last)
<ipython-input-22-7aafd41f326e> in <module>()
----> 1 text = json.loads(text)
c:\users\..\python\python36\lib\json\__init__.py in loads(s, encoding,
cls, object_hook, parse_float, parse_int, parse_constant,
object_pairs_hook, **kw)
352 parse_int is None and parse_float is None and
353 parse_constant is None and object_pairs_hook is
None and not kw):
--> 354 return _default_decoder.decode(s)
355 if cls is None:
356 cls = JSONDecoder
c:\users\..\python\python36\lib\json\decoder.py in decode(self, s, _w)
337
338 """
--> 339 obj, end = self.raw_decode(s, idx=_w(s, 0).end())
340 end = _w(s, end).end()
341 if end != len(s):
c:\users\..\python\python36\lib\json\decoder.py in raw_decode(self, s,
idx)
353 """
354 try:
--> 355 obj, end = self.scan_once(s, idx)
356 except StopIteration as err:
357 raise JSONDecodeError("Expecting value", s,
err.value) from None
JSONDecodeError: Expecting ':' delimiter: line 5 column 50 (char 161)
?json.loads says that the method is for deserializing "s", with "s"
being a string, bytes, or bytearray.
In [24]: type(text)
Out[24]: str
So "text" seems to be a string. Why does json.loads return an error?
John
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