how do I fix this "AttributeError: 'list' object has no attribute 'astype'"

Question

I am having a problem with my code that it is somehow having a problem of astype, I guess I need to do some cleansing with data. But I am not sure, what can be done with this situation? for data cleansing I tried a few functions such as value_count but does not help. What do you see here as a problem?

  file_name='https://cf-courses-data.s3.us.cloud-object-storage.appdomain.cloud/IBMDeveloperSkillsNetwork-DA0101EN-SkillsNetwork/labs/FinalModule_Coursera/data/kc_house_data_NaN.csv'
df=pd.read_csv(file_name)

     features =["floors", "waterfront","lat" ,"bedrooms" ,"sqft_basement" ,"view" ,"bathrooms","sqft_living15","sqft_above","grade","sqft_living"]  
        Input=[('scale',StandardScaler()),('polynomial', PolynomialFeatures(include_bias=False)),('model',LinearRegression())]
        y=df['price']
        pipe=Pipeline(Input)
        print(pipe)
        features=features.astype(float)
        pipe.fit(features,y)
        ypipe=pipe.predict(features)
        ypipe[0:10]