Luigi Python - Requires dependency breaking script. Error - "Unfulfilled dependency at run time"

Question

I am new to python and looking to implement Luigi into some of my python data processing scripts. I have two tasks, one task will web scrape some data and create a csv. The next task (dependent on the 1st tasks csv file) will run a sql server proc to dump the csv data into the database. When I run these tasks individually they work fine. But when I add a requires it gives me the error you can see in the title.

Please can you let me know what I am doing wrong?

The Luigi full error is as follows:

Runtime error: Traceback (most recent call last): File "C:\Users\somepath\Luigi\venv\python\lib\site-packages\luigi\worker.py", line 182, in run raise RuntimeError('Unfulfilled %s at run time: %s' % (deps, ', '.join(missing))) RuntimeError: Unfulfilled dependency at run time: Generate_TV_WebScraping_File_X__DataMining_Lu_8213e479cf

Apologies for the code sample below in terms of indentations etc. The formatting has been changed on pasting.

My current code is below:

import requests
from bs4 import BeautifulSoup
import re
import pyodbc
import luigi
import arrow

class Generate_TV_WebScraping_File(luigi.ExternalTask):

    input_path = luigi.Parameter('X:/somefilepath/Televised_Football_Staging.csv')

    def ouptut(self):
        return luigi.LocalTarget(self.input_path)

    def run(self):
        ################################ GET DATA FROM WEBSITE ###############################################

        ## set url
        page_link = 'https://www.somewebsite.html'

        ## request access with timout of 5 seconds
        page_response = requests.get(page_link, timeout=5)

        ## BS to parse the html
        page_content = BeautifulSoup(page_response.content, "html.parser")

        ## find all content related to match fixtures div class
        div_team = page_content.findAll('div', attrs={"class":"span4 matchfixture"})

        clean_date = ''

        ## set path and file for data export
        f = open("X:\somefilepath\Televised_Football_Staging.csv", "w")

        ## for all the content in div class 'row-fluid'
        for rows in page_content.findAll('div', attrs={"class":"row-fluid"}):
        ## if the content div class is match date
            if rows.findAll('div', attrs={"class": "span12 matchdate"}):
        ## save it to the variable 'date_row'
              date_row = rows.findAll('div', attrs={"class": "span12 matchdate"})
        ## clean it by removing html tags and comma separate
              concat_rows = ",".join(str(x) for x in date_row)
              clean_date = re.sub("<.*?>", " ", concat_rows)
        ## when it is not a match date in the div class 'row-fluid' and it is the match fixture content
            elif rows.findAll('div', attrs={"class": "span4 matchfixture"}):
        ## clean it by removing html tags and comma separate
                concat_rows = ",".join(str(x) for x in rows)
                clean_rows = re.sub("<.*?>", " ", concat_rows)
        ## print the content and concatenate with date
                f.write('%s\n' % (clean_rows + "," + clean_date))

        ## Close csv
        f.close()

        #######################################################################################################


class Insert_TV_WebScraping_To_Db(luigi.Task):

    def requires(self):
        return Generate_TV_WebScraping_File(self.input_path)

    def ouptut(self):
        sys_date = arrow.now().format('YYYYMMDD')
        return luigi.LocalTarget('X:/somefilepath/tv_webscrape_log_' + sys_date + '.txt')

    def run(self):
        ############################### INSERT DATA INTO DATABASE ###################################################

        ## set sql connection string to DataMiningDev
        cnxn = pyodbc.connect(driver="{SQL Server}", server="someserver", database="somedatabase", autocommit=True)

        ## run sql query
        cursor = cnxn.cursor()
        cursor.execute('EXEC somedatabase.someschema.somedbproc')

        ## being kind
        cnxn.close()

        #############################################################################################################


# Run Luigi Tasks #
#luigi.run(main_task_cls=Generate_TV_WebScraping_File)
luigi.run(main_task_cls=Insert_TV_WebScraping_To_Db)