Python 3.5.2 & json on win 10 - Printable Version

Python 3.5.2 & json on win 10 - Printable Version

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Python 3.5.2 & json on win 10 - PickyBiker - Nov-28-2016

I have uninstalled python on my win 10 system and re-installed python 3.5.2. The following tiny bit of code causes a series of error messages

import json

with open('schedule.json') as data_file:    
    data = json.load(data_file)

print(data)
close("schedule.json")

here is the error message:

Error:Traceback (most recent call last):
  File "read_json.py", line 4, in <module>
    data = json.load(data_file)
  File "C:\Users\Michael\AppData\Local\Programs\Python\Python35\lib\json\__init__.py", line 268, in load
    parse_constant=parse_constant, object_pairs_hook=object_pairs_hook, **kw)
  File "C:\Users\Michael\AppData\Local\Programs\Python\Python35\lib\json\__init__.py", line 319, in loads
    return _default_decoder.decode(s)
  File "C:\Users\Michael\AppData\Local\Programs\Python\Python35\lib\json\decoder.py", line 339, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "C:\Users\Michael\AppData\Local\Programs\Python\Python35\lib\json\decoder.py", line 357, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)


------------------
(program exited with code: 1)

Press any key to continue . . .

And finally, here is the schedule.json file:

{"zones": [[1, 3], [3, 5], [5, 89]], "weekdays": [1, 2], "ontime": [5, 1]}

RE: Python 3.5.2 & json on win 10 - micseydel - Nov-28-2016

How are you running your code? I can't reproduce the problem. That said, your last line can be safely removed; the file is closed with the with block automatically.

RE: Python 3.5.2 & json on win 10 - PickyBiker - Nov-28-2016

(Nov-28-2016, 12:04 AM)micseydel Wrote: How are you running your code? I can't reproduce the problem. That said, your last line can be safely removed; the file is closed with the with block automatically.

I am running from geany. I just tried running it from a command prompt withy python read_json.py and got the same result

Are you getting an output?

RE: Python 3.5.2 & json on win 10 - micseydel - Nov-28-2016

Here's a terminal session for me on Linux

$ cat schedule.json 
{"zones": [[1, 3], [3, 5], [5, 89]], "weekdays": [1, 2], "ontime": [5, 1]}

$ cat testit.py 
import json

with open('schedule.json') as data_file:    
   data = json.load(data_file)

print(data)
$ python testit.py 
{u'zones': [[1, 3], [3, 5], [5, 89]], u'weekdays': [1, 2], u'ontime': [5, 1]}
$ python3 testit.py 
{'ontime': [5, 1], 'weekdays': [1, 2], 'zones': [[1, 3], [3, 5], [5, 89]]}

RE: Python 3.5.2 & json on win 10 - PickyBiker - Nov-28-2016

Are you running Win 10 and python 3.5.2?

RE: Python 3.5.2 & json on win 10 - micseydel - Nov-28-2016

No, I'm using Linux, and I tried Python 2 and Python 3.4. Python and JSON should both be platform independent though, so I don't think that's the problem. My best guess at this point is that you actually have an empty file, and you have an editor window open with unsaved changes.

If that's not the case, try running the code

import json

with open('schedule.json') as data_file:
   print("<>".format(data_file.read())) # print out the contents of the file, within <>
   data_file.seek(0) # restore file state so that the below line might work
   data = json.load(data_file)

print(data)

You can also try creating a Git repo or something that we can clone and know is reproducing the problem for you, since describing it over the forum might not be enough in this case.

RE: Python 3.5.2 & json on win 10 - PickyBiker - Nov-28-2016

I get a different error running the code you provided.
Here is the error message I got an a Debian Linux system:

Error:pi@sprinklersystem:~ $ python test.py
<>
Traceback (most recent call last):
 File "test.py", line 5, in <module>
   data = json.load(data_file)
NameError: name 'json' is not defined

I'm afraid I don't understand what "Git repo or something that we can clone" is???

RE: Python 3.5.2 & json on win 10 - micseydel - Nov-28-2016

It looks like you didn't include the import statement. that said, the "<>" line does indicate that the problem is that the .json file is empty.

(Nov-28-2016, 04:16 AM)PickyBiker Wrote: I'm afraid I don't understand what "Git repo or something that we can clone" is???

Basically a nerdier version of zip files. I'm quite confident at this point that the issue is an empty JSON file, but if you're still having issues, create a zip file with everything needed to reproduce the problem and we can try to use that.

RE: Python 3.5.2 & json on win 10 - snippsat - Nov-28-2016

I have testet with win-10 Python 3.5.2 no problem.
In most cases your:

Error:
json.loads- JSONDecodeError: Expecting value: line 1 column 1 (char 0)

non-JSON conforming quoting
XML/HTML output (that is, a string starting with <), or
incompatible character encoding

To make sure your json file is correct,
paste date in Json Formatter --> Process,
now download file and try with this file.

RE: Python 3.5.2 & json on win 10 - PickyBiker - Nov-28-2016

Okay, here is the latest status

The schedule.json file is okay according to the online json formatter.
The simpler code now is:

import json

with open('schedule.json') as data_file:    
    data = json.load(data_file)

print(data)

The code and json file work just fine on a debian system.
And it still fails with Win 10 system

Error:Traceback (most recent call last):
  File "read_json.py", line 4, in <module>
    data = json.load(data_file)
  File "C:\Users\Michael\AppData\Local\Programs\Python\Python35\lib\json\__init__.py", line 268, in load
    parse_constant=parse_constant, object_pairs_hook=object_pairs_hook, **kw)
  File "C:\Users\Michael\AppData\Local\Programs\Python\Python35\lib\json\__init__.py", line 319, in loads
    return _default_decoder.decode(s)
  File "C:\Users\Michael\AppData\Local\Programs\Python\Python35\lib\json\decoder.py", line 339, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "C:\Users\Michael\AppData\Local\Programs\Python\Python35\lib\json\decoder.py", line 357, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)


------------------
(program exited with code: 1)

Press any key to continue . . .

It looks to me that this problem is unique to win 10.