AttributeError: 'unicode' object has no attribute 'get'

from flask.ext.api import FlaskAPI
from flask import request, current_app, abort
from functools import wraps

app = FlaskAPI(__name__)
app.config.from_object('settings')

def token_auth(f):
    @wraps(f)
    def decorated_function(*args, **kwargs):
        if request.headers.get('X-API-TOKEN', None) != current_app.config['API_TOKEN']:
            abort(403)
        return f(*args, **kwargs)
    return decorated_function

@app.route('/predict', methods=['POST'])
@token_auth
def predict():
    from big_model import model
    item = request.data.get('item')
    total_predictions = request.data.get('num', 100)
    if not item:
        return []
    return model.predict(str(item), total_predictions)


@app.route('/train')
@token_auth
def train():
    from big_model import model
    data_url = request.data.get('data-url', None)
    model.train(data_url)
    return {"message": "Success!", "success": 1}

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