How do I solve the following error?

from flask import Flask, render_template
app = Flask(__name__)

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

<pre lang="Python">