Using JSN with Python

Question

I am trying to send JSON request using Python, but I receive an error when I try to create JSON object using the following format:

data="{
"auth": {
  "tenantName": "user1",
  "passwordCredentials": {
  "username": "user1",
  "password": "pass"
  }
 }
}"

The error message is:

File "auth.py", line 5
    data="{
          ^
SyntaxError: EOL while scanning string literal

ThiefMaster · Accepted Answer · 2014-07-02 12:17:57Z

7

You can simply create a dict and use json.dumps() to create a JSON string from it.

import json

data = json.dumps({
    'auth': {
        'tenantName': 'user1',
        'passwordCredentials': {
            'username': 'user1',
            'password': 'pass'
        }
    }
})

What you did is invalid since you can't have linebreaks in a "normal" quoted string - you'd have to use triple quotes instead. However, don't do that. Creating JSON using string functions is a bad idea, even if it's just dumpling a hand-crafted JSON string into a string.

edited Jul 2, 2014 at 12:17

answered Jul 2, 2014 at 12:12

ThiefMaster

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Comments

Martijn Pieters · Accepted Answer · 2014-07-02 12:13:57Z

2

Your string definition is invalid, you cannot use multiple lines and " quotes in a string delimited by just a single " quote. The following works:

data="""{
"auth": {
  "tenantName": "user1",
  "passwordCredentials": {
  "username": "user1",
  "password": "pass"
  }
 }
}"""

as that uses triple-quoting.

You may want to consider using the json module instead to produce valid JSON, this reduces the chances for errors greatly:

import json

data = {
    'auth': {
        'tenantName': 'user1',
        'passwordCredentials': {
            'username': 'user1',
            'password': 'pass'
        }
    }
}

data = json.dumps(data)

answered Jul 2, 2014 at 12:13

Martijn Pieters

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1 Comment

ThiefMaster Over a year ago

I wouldn't even suggest him to write the JSON string manually inside a string... He might end up doing that instead of using json.dumps ;)

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