path_to_json = '' #old path
        path_to_newjson ='' #new path
        key_id = '' #aws key
        json_files = [pos_json for pos_json in os.listdir(path_to_json) if pos_json.endswith('.json')] #loading all jsons in old path
 
 
        jsons_data = pd.DataFrame(columns=['password']) #looking for password
 
 
        def encode_password(obj):
 
            if 'password' in obj:
                listpasswords = obj['password']
                jsons_data.loc[index] = [listpasswords]
                print('Current Loaded password: ' + jsons_data)
                print(listpasswords)
                text = listpasswords
                # sample_string_bytes = text.encode('ascii')
                # base64_bytes = base64.b64encode(sample_string_bytes)
                # finalpassword64password = base64_bytes.decode('ascii')
                # obj['password'] = finalpassword64password
               

    
                session = boto3.session.Session()
                client = session.client('kms', 'us-west-1')
                encryption_result = client.encrypt(KeyId=key_id,
                Plaintext=text)
                print('password updated: ' + text)
 
                blob = encryption_result['CiphertextBlob']
                obj['password'] = blob            
                print(base64.b64encode(blob))
            return obj
 
        for index, js in enumerate(json_files):
            with open(os.path.join(path_to_json, js)) as json_file:
                json_text = commentjson.load(json_file, object_hook=encode_password)
                with open(os.path.join(path_to_newjson, js),'w') as f:
                    commentjson.dump(json_text,f,indent = 4) #updates the password  
                    print('finished')

I'm trying to get an value (password field) from a list of jsons and update all in one go. The issue I am having is I need to encrypt the old password taken from the json and update it with the AWS encryption along with 64 encoding. When I try this out, it throws an error, with "TypeError: Object of type bytes is not JSON serializable". If I simply want to just encode the string with 64 encoding and update the json, it works but once I comment out the previous code and add the encryption of AWS it throws an error.

I am getting this error when I try to run the register and login pages from this tutorial. As far as I can tell, my code matches the tutorial code, so I don't know why I get an error.

register.py:

from flask_wtf import FlaskForm
from wtforms import StringField, PasswordField, SubmitField, BooleanField
from wtforms.validators import DataRequired, Length, Email, EqualTo


class RegistrationForm(FlaskForm):
    username = StringField('Username',
                           validators=[DataRequired(), Length(min=2, max=20)])
    email = StringField('Email',
                        validators=[DataRequired(), Email()])
    password = PasswordField('Password', validators=[DataRequired()])
    confirm_password = PasswordField('Confirm Password',
                                     validators=[DataRequired(), EqualTo('password')])
    submit = SubmitField('Sign Up')


class LoginForm(FlaskForm):
    email = StringField('Email',
                        validators=[DataRequired(), Email()])
    password = PasswordField('Password', validators=[DataRequired()])
    remember = BooleanField('Remember Me')
    submit = SubmitField('Login')    

run.py:

from flask import Flask, render_template, url_for, flash, redirect
from forms import RegistrationForm, LoginForm

app = Flask(__name__)
app.config['SECRET_KEY'] = '5791628bb0b13ce0c676dfde280ba245'

posts = [
    {
        'author': 'Corey Schafer',
        'title': 'Blog Post 1',
        'content': 'First post content',
        'date_posted': 'April 20, 2018'
    },
    {
        'author': 'Jane Doe',
        'title': 'Blog Post 2',
        'content': 'Second post content',
        'date_posted': 'April 21, 2018'
    }
]


@app.route("/")
@app.route("/home")
def home():
    return render_template('home.html', posts=posts)


@app.route("/about")
def about():
    return render_template('about.html', title='About')


@app.route("/register", methods=['GET', 'POST'])
def register():
    form = RegistrationForm()
    if form.validate_on_submit():
        flash(f'Account created for {form.username.data}!', 'success')
        return redirect(url_for('home'))
    return render_template('register.html', title='Register', form=form)


@app.route("/login", methods=['GET', 'POST'])
def login():
    form = LoginForm()
    if form.validate_on_submit():
        if form.email.data == 'admin@blog.com' and form.password.data == 'password':
            flash('You have been logged in!', 'success')
            return redirect(url_for('home'))
        else:
            flash('Login Unsuccessful. Please check username and password', 'danger')
    return render_template('login.html', title='Login', form=form)


if __name__ == '__main__':
    app.run(debug=True)

The error message in full:

File "c:\python37\lib\site-packages\flask\app.py", line 2328, in __call__
return self.wsgi_app(environ, start_response)
File "c:\python37\lib\site-packages\flask\app.py", line 2314, in wsgi_app
response = self.handle_exception(e)
File "c:\python37\lib\site-packages\flask\app.py", line 1760, in handle_exception
reraise(exc_type, exc_value, tb)
File "c:\python37\lib\site-packages\flask\_compat.py", line 36, in reraise
raise value
File "c:\python37\lib\site-packages\flask\app.py", line 2311, in wsgi_app
response = self.full_dispatch_request()
File "c:\python37\lib\site-packages\flask\app.py", line 1834, in full_dispatch_request
rv = self.handle_user_exception(e)
File "c:\python37\lib\site-packages\flask\app.py", line 1737, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "c:\python37\lib\site-packages\flask\_compat.py", line 36, in reraise
raise value
File "c:\python37\lib\site-packages\flask\app.py", line 1832, in full_dispatch_request
rv = self.dispatch_request()
File "c:\python37\lib\site-packages\flask\app.py", line 1818, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "C:\code\codeinstitute\python\flask\run.py", line 36, in register
form = RegistrationForm()
File "c:\python37\lib\site-packages\wtforms\form.py", line 212, in __call__
return type.__call__(cls, *args, **kwargs)
File "c:\python37\lib\site-packages\flask_wtf\form.py", line 88, in __init__
super(FlaskForm, self).__init__(formdata=formdata, **kwargs)
File "c:\python37\lib\site-packages\wtforms\form.py", line 278, in __init__
self.process(formdata, obj, data=data, **kwargs)
File "c:\python37\lib\site-packages\wtforms\form.py", line 132, in process
field.process(formdata)
File "c:\python37\lib\site-packages\wtforms\csrf\core.py", line 43, in process
self.current_token = self.csrf_impl.generate_csrf_token(self)
File "c:\python37\lib\site-packages\flask_wtf\csrf.py", line 134, in generate_csrf_token
token_key=self.meta.csrf_field_name
File "c:\python37\lib\site-packages\flask_wtf\csrf.py", line 47, in generate_csrf
setattr(g, field_name, s.dumps(session[field_name]))
File "c:\python37\lib\site-packages\itsdangerous\serializer.py", line 166, in dumps
payload = want_bytes(self.dump_payload(obj))
File "c:\python37\lib\site-packages\itsdangerous\url_safe.py", line 42, in dump_payload
json = super(URLSafeSerializerMixin, self).dump_payload(obj)
File "c:\python37\lib\site-packages\itsdangerous\serializer.py", line 133, in dump_payload
return want_bytes(self.serializer.dumps(obj, **self.serializer_kwargs))
File "c:\python37\lib\site-packages\itsdangerous\_json.py", line 18, in dumps
return json.dumps(obj, **kwargs)
File "c:\python37\lib\json\__init__.py", line 238, in dumps
**kw).encode(obj)
File "c:\python37\lib\json\encoder.py", line 199, in encode
chunks = self.iterencode(o, _one_shot=True)
File "c:\python37\lib\json\encoder.py", line 257, in iterencode
return _iterencode(o, 0)
File "c:\python37\lib\json\encoder.py", line 179, in default
raise TypeError(f'Object of type {o.__class__.__name__} '
TypeError: Object of type bytes is not JSON serializable