from flask import Flask
from flask import request 
from flask import render_template
import registration
app = Flask(__name__)

@app.route("/")
def index():
    return render_template("registration.html")
@app.route("/registration", methods=['POST', 'GET'])
def registration():
    email=request.form['email']
    password=request.form['password']
    registration.reg(email,password)
    return "Ok!"
if __name__ == "__main__":
    app.run(host='0.0.0.0')

#registration
def email(email):
    import re
    if(email):
        pattern=r"^[a-zA-Z0-9]{1,100}[@][a-z]{2,6}\.[a-z]{2,4}"
        number_re=re.compile(pattern)
        if number_re.findall(email):
                return email
def password(password):
    if(password):
        if(len(password) >= 8):
            return password
def passwordmd5(password):
    import hashlib
    if(password):
        hsh=hashlib.md5()
        hsh.update(password)
        md5=hsh.hexdigest()
        return md5
def reg(v_email,v_password):
    v_email=email(v_email)
    v_password=password(v_password)
    v_password=passwordmd5(v_password)
    return "reegistration continie"

Internal Server Error

The server encountered an internal error and was unable to complete your request. Either the server is overloaded or there is an error in the application.