Python - TypeError: expected string or buffer

Question

@app.route("/data/<dataType>", methods=['GET'])
def realtime(dataType):
    _data = None
    with open(os.path.join("data/"+ dataType +".json")) as f:
    _data = json.loads(f)
return dumps(_data)

I wrote this code to get data in JSON format from a file, but it keeps giving me the error:

TypeError: expected string or buffer

What is wrong with it?

loads expects a string with json, not a file object. Use load instead — Konstantin
– Konstantin, Commented Jul 4, 2015 at 17:33
Additionally, your indenting is very incorrect in the posted code. — cod3monk3y
– cod3monk3y, Commented Jul 4, 2015 at 17:38
yeah, it was only on the stack, i made some indent while uploading the question. my original code is ok . thx anyway — Roundy
– Roundy, Commented Jul 4, 2015 at 17:45

felipsmartins · Accepted Answer · 2015-07-04 17:36:09Z

2

f is a file, while json.loads() expects a string. Use f.read() to read a string from the file.

edited Jul 4, 2015 at 17:36

felipsmartins

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answered Jul 4, 2015 at 17:33

stark

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2 Comments

cod3monk3y Over a year ago

To clarify, f.read() reads the entire file as a string. So Stephen probably wants json.loads(f.read()).

stark Over a year ago

Be sure to ... Oh, he's gone.

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