Insert scraped table data directly into PostgreSQL db

问题

I want to insert my scraped data directly into PostgreSQL db, I'm struggling with writing query for this, any help would be appreciated.

The code I've came up with so far:

import csv
import urllib.request
from bs4 import BeautifulSoup
conn = psycopg2.connect(database='--',user='--', password='--', port=--)
cursor = conn.cursor()
soup = BeautifulSoup(urllib.request.urlopen("http://tis.nhai.gov.in/TollInformation?TollPlazaID=236").read(),'lxml')
tbody = soup('table' ,{"class":"tollinfotbl"})[0].find_all('tr')
for row in tbody:
    cols = row.findChildren(recursive=False)
    cols = [ele.text.strip() for ele in cols]
    writer.writerow(cols)
    print(cols)

My table's details are as follows:

    Column     |  Type   | Modifiers
---------------+---------+-----------
 vehicle_type  | text    | not null
 one_time      | integer | not null
 return_trip   | integer |
 monthly_pass  | integer | not null
 local_vehicle | integer | not null

回答1:

I assume that cols contains 5 elements, in order which you presented at your table, otherwise adjust indexes.

import csv
import urllib.request

from bs4 import BeautifulSoup

conn = psycopg2.connect(database='--', user='--', password='--', port='--')
cursor = conn.cursor()
soup = BeautifulSoup(urllib.request.urlopen(
    "http://tis.nhai.gov.in/TollInformation?TollPlazaID=236").read(), 'lxml')
tbody = soup('table', {"class": "tollinfotbl"})[0].find_all('tr')
for row in tbody:
    cols = row.findChildren(recursive=False)
    cols = [ele.text.strip() for ele in cols]
    if cols:
        vehicle_type = cols[0]
        one_time = int(cols[1])
        return_strip = int(cols[2])
        monthly_pass = int(cols[3])
        local_vehicle = int(cols[4])

        query = "INSERT INTO table_name (vehicle_type, return_strip, monthly_pass, local_vehicle) VALUES (%s, %s, %s, %s, %s);"
        data = (vehicle_type, one_time, return_strip, monthly_pass, local_vehicle)
        cursor.execute(query, data)

# Commit the transaction
conn.commit()

来源：https://stackoverflow.com/questions/46025873/insert-scraped-table-data-directly-into-postgresql-db

标签

python

postgresql

psycopg2