lolwinrates calculates and displays your winrate in League of Legends games by using Python with Matplotlib to access the Riot Games API. The API can be accessed by signing in with your League of Legends account, where you can get your 24-hour developer API key.

To use this program, replace the API key on line 4 of api_request.py, then run run.py. You'll be prompted to enter the summoner name (not case sensitive), and the queue type: "blind", "draft", "solo", or "flex" (also not case sensitive). The script will access your match history, and parse through up to 50 of your past games in that queue, then display your win-loss record and win percentage, then the list of champions you played, sorted by frequency, the winrates of each champion, and number of games played for each champion, and creates a bar graph with champion winrates using Matplotlib.

Sample output:

Summoner Name?
Liew211
Which queue?
Solo
29 wins 21 losses
58.00%
Sivir 72.00% 25 games
Jinx 46.15% 13 games
Ezreal 60.00% 5 games
Fiora 0.00% 2 games
Caitlyn 0.00% 1 game
Ashe 100.00% 1 game
Vladimir 0.00% 1 game
Corki 0.00% 1 game
Garen 100.00% 1 game