[Python] Session object in FastAPI similar to Flask

I am trying to use session to pass variables across view functions in fastapi. However, I do not find any doc which specifically says of about session object. Everywhere I see, cookies are used. Is there any way to convert the below flask code in fastapi? I want to keep session implementation as simple as possible.

from flask import Flask, session, render_template, request, redirect, url_for


app=Flask(__name__)
app.secret_key='asdsdfsdfs13sdf_df%&'

@app.route('/a')
def a():
session['my_var'] = '1234'
return redirect(url_for('b'))


@app.route('/b')
def b():
my_var = session.get('my_var', None)
return my_var


if __name__=='__main__':
app.run(host='0.0.0.0', port=5000, debug = True)

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