CODEWITHSUNDEEP
pythonjsonpython-3.x
belonious
belonious

Reputation: 133

i get error after simple try to store json

In python 3,3

import  json

peinaw = {"hi":4,"pordi":6}
json_data = open('data.json')
json.dump(peinaw, json_data)
json_data.close()

i get 

File "C:\Python33\lib\json\__init__.py", line 179, in dump
fp.write(chunk)
io.UnsupportedOperation: not writable

tried same thing in 2,7 and it works.I s there a different way in 3,3?

Upvotes: 3

Views: 4548

Answers (3)

pradyunsg
pradyunsg

Reputation: 19486

You are not opening the file for writing. The file is opened in a read mode. to verify do this:

json_data = open('data.json')
print (json_data) # should work with 2.x and 3.x

To solve the probem, just open the file in write mode.

json_data = open('data.json', 'w')

Also, you should use the with statement when woking with files.

with open('data.json', 'w') as json_data:
   json.dump(peinaw, json_data)

Upvotes: 2

jamylak
jamylak

Reputation: 133754

>>> import  json
>>> peinaw = {"hi":4,"pordi":6}
>>> with open('data.json', 'w') as json_data: # 'w' to open for writing
        json.dump(peinaw, json_data)

I used a with statement here, where the file is automatically .close()d at the end of the with block.

Upvotes: 5

ndpu
ndpu

Reputation: 22571

You need to open file for writing, use 'w' mode parameter:

json_data = open('data.json', 'w')

Upvotes: 1

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