python, writing Json to file [duplicate]

Question

I'm trying to write my first json file. But for some reason, it won't actually write the file. I know it's doing something because after running dumps, any random text I put in the file, is erased, but there is nothing in its place. Needless to say but the load part throws and error because there is nothing there. Shouldn't this add all of the json text to the file?

from json import dumps, load
n = [1, 2, 3]
s = ["a", "b" , "c"]
x = 0
y = 0

with open("text", "r") as file:
    print(file.readlines())
with open("text", "w") as file:
    dumps({'numbers':n, 'strings':s, 'x':x, 'y':y}, file, indent=4)
file.close()

with open("text") as file:
    result = load(file)
file.close()
print (type(result))
print (result.keys())
print (result)

alecxe · Accepted Answer · 2014-05-20 00:54:10Z

56

You can use json.dump() method:

with open("text", "w") as outfile:
    json.dump({'numbers':n, 'strings':s, 'x':x, 'y':y}, outfile, indent=4)

edited May 20, 2014 at 0:54

answered Apr 28, 2013 at 21:02

alecxe

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Comments

R.U.F. · Accepted Answer · 2016-07-18 12:17:52Z

11

Change:

dumps({'numbers':n, 'strings':s, 'x':x, 'y':y}, file, indent=4)

To:

file.write(dumps({'numbers':n, 'strings':s, 'x':x, 'y':y}, file, indent=4))

Also:

don't need to do file.close(). If you use with open..., then the handler is always closed properly.
result = load(file) should be result = file.read()

edited Jul 18, 2016 at 12:17

R.U.F.

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answered Apr 28, 2013 at 20:59

Jakub M.

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