[Python] meu bot do telegram com matplotlib não funciona

Meu codigo ta dando erro, eu não consigo mostrar o gráfico em um bot de telegram, que ele quebra o código

import matplotlib.pyplot as plt
​

def gerar_grafico(despesas): if not despesas: return None categorias = {} for d in despesas: categorias[d['categoria']] = categorias.get(d['categoria'], 0) + float(d['valor'])

labels = list(categorias.keys())
valores = list(categorias.values())

plt.figure(figsize=(6,6))
plt.pie(valores, labels=labels, autopct='%1.1f%%')
plt.title('Distribuição das Despesas por Categoria')
caminho_arquivo = 'grafico_despesas.png'
plt.savefig(caminho_arquivo)
plt.close()
return caminho_arquivo


porém, da esse erro

2025-09-02 19:23:12,989 (init.py:1115 MainThread) ERROR - TeleBot: "Infinity polling exception: could not convert string to float: 'Onibus'" 2025-09-02 19:23:12,995 (init.py:1117 MainThread) ERROR - TeleBot: "Exception traceback: Traceback (most recent call last): File "C:\Users\Paulo\Downloads\bot.venv\Lib\site-packages\telebot_init_.py", line 1110, in infinity_polling self.polling(non_stop=True, timeout=timeout, long_polling_timeout=long_polling_timeout, ~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ logger_level=logger_level, allowed_updates=allowed_updates, restart_on_change=False, ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ *args, **kwargs) ^^^^^^^^^^^^^^^^ File "C:\Users\Paulo\Downloads\bot.venv\Lib\site-packages\telebot_init_.py", line 1198, in polling self._threaded_polling(non_stop=non_stop, interval=interval, timeout=timeout, long_polling_timeout=long_polling_timeout, ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ logger_level=logger_level, allowed_updates=allowed_updates) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Users\Paulo\Downloads\bot.venv\Lib\site-packages\telebot_init.py", line 1273, in _threaded_polling raise e File "C:\Users\Paulo\Downloads\bot.venv\Lib\site-packages\telebot_init.py", line 1235, in _threaded_polling self.worker_pool.raise_exceptions() ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^ File "C:\Users\Paulo\Downloads\bot.venv\Lib\site-packages\telebot\util.py", line 154, in raise_exceptions raise self.exception_info File "C:\Users\Paulo\Downloads\bot.venv\Lib\site-packages\telebot\util.py", line 97, in run task(*args, **kwargs) ~~~~^^^^^^^^^^^^^^^^^ File "C:\Users\Paulo\Downloads\bot.venv\Lib\site-packages\telebot_init.py", line 10134, in _run_middlewares_and_handler result = handler'function' File "c:\Users\Paulo\Downloads\bot\comandos.py", line 88, in enviar_grafico caminho_arquivo = gerar_grafico(despesas_dict) File "c:\Users\Paulo\Downloads\bot\grafico.py", line 8, in gerar_grafico categorias[d['categoria']] = categorias.get(d['categoria'], 0) + float(d['valor']) ~~~~~^^^^^^^^^^^^ ValueError: could not convert string to float: 'Onibus' "

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