Answers to CS50x 2019 Problem Set 7: Web Programming.
Similarities
helpers.py solution
def sentences(a, b):
"""Return sentences in both a and b"""
a_sentences = set(sent_tokenize(a))
b_sentences = set(sent_tokenize(b))
return a_sentences & b_sentences
def substring_tokenize(str, n):
substrings = []
for i in range(len(str) - n + 1):
substrings.append(str[i:i + n])
return substrings
def substrings(a, b, n):
"""Return substrings of length n in both a and b"""
a_substrings = set(substring_tokenize(a, n))
b_substrings = set(substring_tokenize(b, n))
return a_substrings & b_substrings
Survey
application.py solution
import cs50
import csv
from flask import Flask, jsonify, redirect, render_template, request
# Configure application
app = Flask(__name__)
# Reload templates when they are changed
app.config["TEMPLATES_AUTO_RELOAD"] = True
@app.after_request
def after_request(response):
"""Disable caching"""
response.headers["Cache-Control"] = "no-cache, no-store, must-revalidate"
response.headers["Expires"] = 0
response.headers["Pragma"] = "no-cache"
return response
@app.route("/", methods=["GET"])
def get_index():
return redirect("/form")
@app.route("/form", methods=["GET"])
def get_form():
return render_template("form.html")
@app.route("/form", methods=["POST"])
def post_form():
if not request.form.get("name"):
return render_template("error.html", message="You did not provide a name.")
file = open("survey.csv", "a")
writer = csv.writer(file)
writer.writerow((request.form.get("name"), request.form.get("position"), request.form.get("house")))
file.close()
return redirect("/sheet")
@app.route("/sheet", methods=["GET"])
def get_sheet():
file = open("survey.csv", "r")
reader = csv.reader(file)
students = list(reader)
return render_template("registered.html", students=students)