Create app.py

app.py

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+import traceback
+import streamlit as st
+from langchain_core.prompts import ChatPromptTemplate
+from langchain_core.output_parsers import StrOutputParser
+from langchain_openai import ChatOpenAI
+from langchain_anthropic import ChatAnthropic
+from langchain_google_genai import ChatGoogleGenerativeAI
+
+###### dotenv を利用する場合 ######
+try:
+    from dotenv import load_dotenv
+    load_dotenv()
+except ImportError:
+    import warnings
+    warnings.warn("dotenv not found. Please make sure to set your environment variables manually.", ImportWarning)
+################################################
+
+
+PROMPT = """
+次の文を修正してください。
+出力言語は日本語です。
+ここにテキストが入ります: {text}
+"""
+
+def init_page():
+    st.set_page_config(
+        page_title="テキスト校正AIエージェント",
+        page_icon="✍️"
+    )
+    st.header("テキスト校正AIエージェント ✍️")
+
+
+def select_model(temperature=0):
+    models = ("GPT-4o","GPT-4o-mini", "Claude 3.5 Sonnet", "Gemini 1.5 Pro")
+    model_choice = st.radio("Choose a model:", models)
+    if model_choice == "GPT-4o":
+        return ChatOpenAI(temperature=temperature, model_name="gpt-4o")
+    elif model_choice == "GPT-4o-mini":
+        return ChatOpenAI(temperature=temperature, model_name="gpt-4o-mini")
+    elif model_choice == "Claude 3.5 Sonnet":
+        return ChatAnthropic(temperature=temperature, model_name="claude-3-5-sonnet-20240620")
+    elif model_choice == "Gemini 1.5 Pro":
+        return ChatGoogleGenerativeAI(temperature=temperature, model="gemini-1.5-pro-latest")
+
+def init_chain():
+    llm = select_model()
+    prompt = ChatPromptTemplate.from_messages([
+        ("user", PROMPT),
+    ])
+    output_parser = StrOutputParser()
+    chain = prompt | llm | output_parser
+    return chain
+
+def main():
+    init_page()
+    chain = init_chain()
+    if chain:
+        text = st.text_area("ここに日本語のテキストを入力してください：", key="text")
+        if st.button("テキストを校正する"):
+            result = chain.stream({"text": text})
+            st.write(result)   
+      
+
+if __name__ == '__main__':
+    main()
+
+# Style adjustments (optional, remove if not needed)
+st.markdown(
+"""
+<style>
+/* Custom style adjustments */
+.st-emotion-cache-iiif1v { display: none !important; }
+</style>
+""",
+    unsafe_allow_html=True,
+)