CODEWITHSUNDEEP
pythonpython-3.x
james
james

Reputation: 167

Call variable when inside double quotes

CRED_DATA = 'randomcred'
payload = "{\n  \"password\": \"CRED_DATA\" ,\n  \"username\": \"dom\\\\user\"\n}"
print(payload)

Output: 

{
  "password": "CRED_DATA" ,
  "username": "dom\\user"
}

I tried double quotes, single quotes, { [ etc cannot figure it out . Is there a way to call the variable when inside the dict that is double quoted?

Upvotes: 0

Views: 1341

Answers (4)

abhiarora
abhiarora

Reputation: 10440

You can try F-Strings in Python:

CRED_DATA = 'randomcred'
payload = F"{{\n  \"password\": \"{CRED_DATA}\" ,\n  \"username\": \"dom\\\\user\"\n}}"
print(payload)

Output:

{
  "password": "randomcred" ,
  "username": "dom\\user"
}

However, depending on the value of CRED_DATA, this is not guaranteed to produce valid JSON (Thanks to @chepner). You can also use dict and json.dumps() in Python as already mentioned in the other answer.

Upvotes: 1

kkubina
kkubina

Reputation: 145

You payload variable is not a dictionary, it is a string. I suppose you want to sort of serialize iot for sending over the network or something - it would help if you elaborated your intent.

In any case: If you want python to resolve the variable in your string, try something like:

payload = "{\n  \"password\": \"" + CRED_DATA + "\" ,\n  \"username\": \"dom\\\\user\"\n}"

...But I personally think it would be better to use a dictionary, and json.dumps to achieve this:

import json

CRED_DATA = 'randomcred'

payload = {
    "password": CRED_DATA,
    "username": "dom user"
}

print(json.dumps(payload, indent=4, sort_keys=True))

Again. Depending on your use case which is not clear from the question.

Upvotes: 0

arandomdosfile
arandomdosfile

Reputation: 19

do you mean this?

CRED_DATA = 'randomcred' payload = "password:",CRED_DATA payload2 = ("\n \"username\": \"dom\\\\user\"\n}") print(payload) print(payload2)

Upvotes: 0

chepner
chepner

Reputation: 531993

Generate the JSON properly, using a dict and json.dump.

CRED_DATA = 'randomcred'
payload = {'password': CRED_DATA, 'username': r'dom\user'}
print(json.dumps(payload))

If you are getting the JSON value from somewhere else, decode it first, update the resulting dict, and then dump it again.

payload = json.loads(payload)
payload['password'] = CRED_DATA
payload = json.dumps(payload)

Upvotes: 3

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