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Python API wrapper for the Yahoo Fantasy Sports public API.

Project description

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Python API wrapper for the Yahoo Fantasy Sports public API

By Wren J. R. (uberfastman)

Yahoo Fantasy Sports API Wrapper (YFPY)

Table of Contents


About

YFPY is a comprehensive wrapper around the Yahoo Fantasy Sports API. It allows for easy retrieval and parsing of almost any data you might wish to extract and use from any Yahoo fantasy league to which your Yahoo account has access (or for public leagues). The primary focus of this wrapper is on fantasy football (NFL), but it also supports usage with fantasy hockey (NHL), fantasy baseball (MLB), and fantasy basketball (NBA).


Usage

  • In your project directory, run

    pip install yfpy
    

    or add yfpy to your project requirements.txt.

  • Follow the instructions in the below Setup section.

  • See test/test.py for fully functional code snippets within the query tests that demonstrate how to use YFPY.

  • PLEASE NOTE: Assuming you followed the setup instructions correctly, the first time you use YFPY, a browser window will open up asking you to allow your app to access your Yahoo fantasy sports data. You MUST hit allow, and then copy the verification code that pops up into the command line prompt where it will now be asking for verification, hit enter, and the OAuth2 three-legged handshake should be complete and your data should have been successfully retrieved.

  • YFPY should have now generated a token.json for you in the same directory where you stored your private.json credentials, and for all subsequent runs of your app, you should be able to keep retrieving Yahoo fantasy sports data using YFPY without re-verifying, since the generated refresh token should now just renew whenever you use the same token.json file to authenticate your app.


Setup

  • Log in to a Yahoo account with access to whatever fantasy leagues from which you wish to retrieve data.
  • Go to https://developer.yahoo.com/apps/create/ and create an app (you must be logged into your Yahoo account as stated above). For the app, select the following options:
    • Application Name (Required): yfpy (you can name your app whatever you want, but this is just an example).
    • Application Type (Required): select the Installed Application radio button.
    • Description (Optional): you may write a short description of what the app does.
    • Home Page URL (Optional): if you have a web address related to your app you may add it here.
    • Redirect URI(s) (Required): this field must contain a valid redirect address, so you can use localhost:8080
    • API Permissions (Required): check the Fantasy Sports checkbox. You can leave the Read option selected (appears in an accordion expansion underneath the Fantasy Sports checkbox once you select it).
    • Click the Create App button.
    • Once the app is created, it should redirect you to a page for your app, which will show both a Client ID and a Client Secret.
    • Make a copy of examples/EXAMPLE-private.json, rename it to just private.json, and copy the Client ID and Client Secret values to their respective fields (make sure the strings are wrapped regular quotes (""), NOT formatted quotes (“”)). The path to this file will be needed to point YFPY to your credentials.
    • Now you should be ready to initialize the OAuth2 connection between YFPY your Yahoo account.

Dependencies

YFPY has only been tested on macOS, but is written to be platform agnostic. It runs only in Python 3, and has only been tested with Python 3.7.

Direct project dependencies can be viewed in requirements.txt, and all dependencies, including transitive dependencies, can be viewed in dev-requirements.txt.


Troubleshooting

Occasionally when you use the Yahoo fantasy sports API, there are hangups on the other end that can cause data not to transmit, and you might encounter an error similar to this:

Traceback (most recent call last):
  File "yfpy-app.py", line 114, in <module>
    var = app.run()
  File "/Users/your_username/PATH/T0/LOCAL/PROJECT/yfpy-app.py", line 429, in run
    for team in team_standings:
IndexError: list index out of range

Typically when the above error (or a similar error) occurs, it simply means that one of the Yahoo Fantasy Sports API calls failed and so no data was retrieved. This can be fixed by simply re-running data query.

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