Line of code:
data = '{"username": {u}, "password": {p}}'.format(u=user_name, p=password)
I just want to insert variables user_name and password inside the stringified dict above in the places u and p resp.
Error:
data = '{"username": {u}, "password": {p}}'.format(u=user_name, p=password)
KeyError: '"username"'
I also tried with:
data = f'\{"username": {user_name}, "password": {password}\}'
But that didn't seem to work.
Any other way to tackle this?
You need to double up the braces to escape them in str.format patterns.
Though the code is odd, why are you trying to insert stuff into a stringified pseudo-dict instead of stringifying the final dict e.g. json.dumps({'username': u, 'password': p})?
Because here the content of your data items will be "raw" e.g. assuming user_name="billy bob" and password="george" you're doing to end up with
'{"username": billy bob, "password": george}'
which doesn't make much sense to me.
data variable into a requests.post('link', data=data) and the data consists of credentials username and password needed to hit an external API. So was trying to figure out if there is something we can do in shorter lines and edit the variable in such a way without using json library
requests documentation: r = requests.post('https://httpbin.org/post', data = {'key':'value'}). There data is passed as a dictionary, not as a string that looks like a botched representation of a dictionary.
requests.post(..., json=data).payload = {'some': 'data'} followed by r = requests.post(url, data=json.dumps(payload)).When you want to include {} in an f-string we simply double them up.
So the following gives the output you want.
>>> username = "foo"
>>> password = "bar"
>>> f'{{"username": {username}, "password": {password}}}'
'{"username": foo, "password": bar}'
f'{{ "username": "{user_name}", "password": "{password}"}}'
double quotes
data = '{{"username": {u}, "password": {p}}}'.format(u=user_name, p=password)(see answer from @Masklinn)