[Python] Why does the Yahoo-API Start Parameter have no impact on results returned?

My main goal is to pull all players from Yahoo-API for fantasy football. While Yahoo limits returned data to 25 players, another thread suggest changing the "Start" parameter and looping through the data might allow for whole data set retrieval.

With that said, changing the start parameter is not yielding any change in results. In code terms,

Start=0 and Start =25 and Start=2500 all return the SAME players in the URI below.

url = f"{self.base_url}/league/{self.league_id}/players;status=A;start={start},count=25"

Full Script

import os
import requests
from requests_oauthlib import OAuth2Session
import webbrowser
import xml.etree.ElementTree as ET
import csv
import json
# from yahoo_oauth import OAuth2

class YahooFantasyAPI:

def __init__(self):
self.client_id = os.getenv('API_KEY')
self.client_secret = os.getenv('API_SECRET')
self.redirect_uri = 'https://localhost/'
self.league_id = os.getenv('league_id')
self.base_url = 'https://fantasysports.yahooapis.com/fantasy/v2'
self.token = None
self.oauth = OAuth2Session(self.client_id, redirect_uri=self.redirect_uri, scope='openid')
# self.oauth2= OAuth2(self.client_id,self.client_secret,base_url=self.base_url)
self.state = None
self.item_dict=item_dict

def authenticate(self):
# Step 1: Get authorization URL and state
authorization_url, self.state = self.oauth.authorization_url(
'https://api.login.yahoo.com/oauth2/request_auth'
)
print(f"Please go to this URL and authorize access: {authorization_url}")
webbrowser.open(authorization_url)

# Step 2: User pastes the redirected URL with the code
redirect_response = input("Paste the full redirect URL here: ")
print(f"Redirect URL: {redirect_response}")

# Step 3: Verify that the state parameter from the response matches the one in the request
if self.state not in redirect_response:
raise ValueError(f"State in the response does not match the original state. Response state: {redirect_response}")

print(f"State during token request: {self.state}")

# Step 4: Fetch the token, ensuring that the state is passed correctly
self.token = self.oauth.fetch_token(
'https://api.login.yahoo.com/oauth2/get_token',
authorization_response=redirect_response,
client_secret=self.client_secret,
state=self.state # Explicitly pass the state value
)
print("Authentication successful!")

def get_players(self):
global item_dict
if not self.token:
raise ValueError("Authenticate first by calling the authenticate() method.")

done = False
start = 1
while(not done) :
# Define the endpoint URL to get league players
url = f"{self.base_url}/league/{self.league_id}/players;status=A;start={start},count=25"

print(url)

# if not self.oauth.token_is_valid():
# self.auth.refresh_access_token

headers = {
'Authorization': f"Bearer {self.token['access_token']}",
'Accept': 'application/xml' # Expect XML response
}

response = self.oauth.get(url, params={'format': 'json'})

# Print the status code and response content to debug
print(f"Response Status Code: {response.status_code}")
print(f"Content-Type: {response.headers.get('Content-Type')}")
# print(response.content)

with open('all.json', 'a') as csvfile:
csvfile.write(response.text)
csvfile.close()

item_dict = json.loads(response.text)

numPlayersInResp=len(item_dict['fantasy_content']['league'][1]['players'])
# print(item_dict)
print(numPlayersInResp)

start += 25

if numPlayersInResp < 25:
done = True

# Usage
if __name__ == '__main__':

yahoo_api = YahooFantasyAPI()
yahoo_api.authenticate()
yahoo_api.get_players()

Continue reading...