ChatGPT を Python で使ってみる

普通に ChatGPT の API を使うまでのメモ。

準備

以下の URL から API Key を取得
https://platform.openai.com/api-keys

発行されたキーをコピー。(画面外にも長く続きます)

#!/usr/bin/env python3
import json
import requests
import os

os.environ["OPENAI_API_KEY"]="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"

url = "https://api.openai.com/v1/chat/completions"

headers = {
    "Content-Type": "application/json",
    "Authorization": "Bearer " + os.environ["OPENAI_API_KEY"],
}

data = {
    "model": "gpt-3.5-turbo",
    "messages": [
        {
            "role": "user",
            "content": "こんにちは",
        }
    ]
}


response = requests.post(url=url, headers=headers, json=data)
response.encoding = "utf-8"
print(json.dumps(response.json(), indent=2, ensure_ascii=False))

お金払ってくださいと出ました。

{
  "error": {
    "message": "You exceeded your current quota, please check your plan and billing details. For more information on this error, read the docs: https://platform.openai.com/docs/guides/error-codes/api-errors.",
    "type": "insufficient_quota",
    "param": null,
    "code": "insufficient_quota"
  }
}

https://platform.openai.com/settings/organization/billing/overview
こちらから支払いを登録します。

以下のように返事が来ました。

{
  "id": "chatcmpl-DESv79SOAs6l8k0YWYxDptPN3bpjp",
  "object": "chat.completion",
  "created": 1772340133,
  "model": "gpt-3.5-turbo-0125",
  "choices": [
    {
      "index": 0,
      "message": {
        "role": "assistant",
        "content": "こんにちは！お元気ですか？何かお手伝いできることがあればお知らせくださいね。",
        "refusal": null,
        "annotations": []
      },
      "logprobs": null,
      "finish_reason": "stop"
    }
  ],
  "usage": {
    "prompt_tokens": 8,
    "completion_tokens": 32,
    "total_tokens": 40,
    "prompt_tokens_details": {
      "cached_tokens": 0,
      "audio_tokens": 0
    },
    "completion_tokens_details": {
      "reasoning_tokens": 0,
      "audio_tokens": 0,
      "accepted_prediction_tokens": 0,
      "rejected_prediction_tokens": 0
    }
  },
  "service_tier": "default",
  "system_fingerprint": null
}