TypeError：__init __（）为参数'fieldnames'获得了多个值

Question

I have done a web scrape on a website for practice and I am trying to put the data into a pandas dataframe that can be exported to a csv and when I come to a point a TypeError: __init__() got multiple values for argument 'fieldnames' shows up. I want to write the file using the csv module. Can someone explain how the error has come to happen and how to solve it? My code is as follows:

from urllib.request import urlopen as uReq
from bs4 import BeautifulSoup as soup
import csv

my_url = 'https://www.allagents.co.uk/find-agent/london/'

uClient = uReq(my_url)

page_html = uClient.read()

uClient.close()

page_soup = soup(page_html, 'html.parser')

containers = page_soup.findAll('div', {'class':'itemlabel3'})

filename = "webscrape.csv" 
records = []

for container in containers:
    comp_name   = container.find('div', {'class':'labelleft2 col-md-10'}).div.h4.a.text

    address=container.find('div', {'class':'labelleft2 col-md-10'}).div.p.text.replace('\n','')

    tel         = container.find('div', {'class':'labelleft2 col-md-10'}).div.find('p', {'style':'clear: both; margin-bottom: 15px;'}).strong.text

    records.append({'company': comp_name, 'address': address, 'telephone': tel})
writer = csv.DictWriter(filename, "w", fieldnames=['company', 'address', 'telephone'])

writer.writeheader()

for r in records:
    writer.writerow(r)

Error comes on line :

writer = csv.DictWriter(filename, "w", fieldnames=['company', 'address', 'telephone'])

Thanks in advance, any help is appreciated.

Answer 1

In csv.DictWriter , the first two arguments are a file object (not a file name) and then fieldnames (which you specified as "w" ). Try this:

with open(filename, 'w') as f:
    writer = csv.DictWriter(f, ['company', 'address', 'telephone'])
    # write stuff in this block

Answer 2

I suspect that your call to DictWriter has too many parameters:

writer = csv.DictWriter(filename, "w", fieldnames ...
                                   ^
                           what is this?

I assume it should be:

f = open(filename, 'w')
writer = csv.DictWriter(f, fieldnames ...

In your call the fieldnames parameter is assigned "w" , but you are also supplying your own version as a list.