typeerror: object of type 'nonetype' has no len()

Question

Problem:

Hello everyone,

I am trying to create a webscraper which will take links from CSV file and scrape data.

but whenever I run this code it says the object of nonetype has no len().

Below is my code:

import requests
from bs4 import BeautifulSoup
import time
import os
import csv
 
file = {}
final_data = []
 
def read_file():
    global file
    f = open("Data.csv")
    for line in f.readlines():
        data = line.split(",")
        file[data[0]]= data[1]
 
def writedata(alldata1, filename):
    with open("./"+filename, "w")as csvfile:
        csvfile = csv.writer(csvfile, delimiter=",")
        csvfile.writerow("")
        for i in range(0, len(alldata1)):
            csvfile.writerow(alldata1[i])
 
def parse_data():
    global file
    global final_data
    for data_obj in file.keys():
        link = file[data_obj]
        #print(link)
        data = getbyget(link, {})
        soup = BeautifulSoup(data, "html.parser")
        get_details = soup.find_all(class_="box2-body")[0]
        details = get_details.find_all(id="ctl00_ContentPlaceHolder1_Lblproposedenddt")
        name = get_details.find_all(id="ctl00_ContentPlaceHolder1_lblprojectname")
        date = ""
        names = ""
        sublist = []
        for more in details:
            date = more.text
            sublist.append(date)
        for nme in name:
            names = nme.text
            sublist.append(names)
 
        get_state = soup.find_all(class_="box2-body")[1]
        state = get_state.find_all(id="ctl00_ContentPlaceHolder1_lblState")
        city = get_state.find_all(id="ctl00_ContentPlaceHolder1_lbldistrict")
        cities = ""
        states = ""
        for statename in state:
            states = statename.text
            sublist.append(states)
        for citys in city:
            cities = citys.text
            sublist.append(cities)
             
        get_pmptername = soup.find_all(class_="box2-body")[2]
        promotername = get_pmptername.find_all(id="ctl00_ContentPlaceHolder1_Lblpromotername")
        geta = get_pmptername.find_all("a")
        alinks = ""
        promote = ""
        for promoter in promotername:
            promote = promoter.text
            sublist.append(promote)
        for linka in geta:
            alinks = "http://up-rera.in/"+ linka["href"]
            sublist.append(alinks)
            final_data.append(sublist)
            print(final_data)
 
def getbyget(url, values):
    res = requests.get(url, data=values)
    data = res.text
    return data
 
def main():
    read_file()
    datas = parse_data()
    writedata(datas, "UP_DATA.csv")                                                      
main()

What’s going wrong here?

Answer 1

Most of the time, a TypeError involving the None object indicates that a function mistakenly returned None because of a missing return statement. As per your program, there is no return statement in parse_data(), which means that datas has value None.