flask-session-use

guessNumber.py

from flask import Flask, session, redirect, url_for, escape, request
import random

app = Flask(__name__)
app.secret_key = "ASDF1234"

def getHint(randNumber,guess,noOfTry):
    print('random number=',randNumber,type(randNumber))
    print('guessed number=',guess,type(guess))
    print('noOfTry=',noOfTry,type(noOfTry))
    noOfTryLeft = 3 - noOfTry
    if(noOfTry==1):
        if((int(int(randNumber)/5)+int(int(guess)/5))&1):
            return (f"You are in the wrong half! first half(0-4), Second Half(5-9)<br> Number of chances Left {noOfTryLeft} ")
        else:
            return (f"You are in the right half!first half(0-4), Second Half(5-9)<br> Number of chances Left {noOfTryLeft} ")
    elif(noOfTry==2):
        if(int(randNumber)&1):
            return(f"Number is ODD<br> Number of chances Left {noOfTryLeft} ")
        else:
            return(f"Number is even<br> Number of chances Left {noOfTryLeft} ")

@app.route("/")
def index():
    if "username" in session:
        username = session["username"]
        print(f"user {username} logged in!!")
        print(session["randNumber"])
        return (
            "Logged in as "
            + username
            + "<br>"
            + '<form action = "/result" method = "post">'
            + "<input type = text name = guess placeholder='guess the number(0-9)'>"
            + "<br>"
            + "<input type = submit value = guess it>"
            + '</form>'
            + "<b><a href = '/logout'>click here to log out</a></b>"
        )
    return (
        "You are not logged in <br><a href = '/login'></b>"
        + "click here to log in</b></a>"
    )

@app.route('/result', methods=['POST'])
def result():
    guess = request.form["guess"]
    randNumber = session["randNumber"]
    noOfTry = session["noOfTry"]
    if(guess == randNumber):
        return ('Great!! you did it!')

    else:
        noOfTry+=1
        if(noOfTry >= 3):
            return '''
                <h3>All tries done! You may log out or simply close the tab!</h3>
                <br>
                <a href = '/logout'>click here to log out</a>
            '''
        # print(type(session['noOfTry']),session['noOfTry'])
        session['noOfTry']=noOfTry
        hintMsg = getHint(randNumber,guess,noOfTry)
        return f'''
        <p> Wrong Answer <p><br>
        <p>{hintMsg}<p>
        <br>
        <a href='/'>
        <button>Try Again</button>
        </a>
        '''

@app.route("/login", methods=["GET", "POST"])
def login():
    if request.method == "POST":
        session["username"] = request.form["username"]
        randNumber = str(random.randint(0,9))
        session["randNumber"]= randNumber
        session["noOfTry"]= 0
        print("number is=",randNumber)
        return redirect(url_for("index"))
    return """
	<form action = "/login" method = "post">
	<p><input type = text name = username></p>
	<p><input type = submit value = Login></p>
	</form>
	"""


@app.route("/logout")
def logout():
    # remove the username from the session if it is there
    session.pop("username", None)
    return redirect(url_for("index"))

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