Added CLI (#2)

* Added CLI interface

* Added check on OpenAI key

.ruff.toml

@@ -0,0 +1,2 @@
+# Allow lines to be as long as 120 characters.
+line-length = 120

sanclone/main.py

@@ -0,0 +1,37 @@
+# -*- coding: utf-8 -*-
+import click
+
+WELCOME = """
+Welcome to San Clone 👋  a molecular cloning agent 🧬.
+Give it an instruction like "Clone NADH Oxidase from Streptococcus pyogenes into the pET16b"
+and press ✨ enter ✨
+"""
+
+
+@click.command()
+def main():
+    # check openai key
+    try:
+        from langchain.llms import OpenAI
+
+        OpenAI(model="babbage-002")
+    except Exception as e:
+        if "OPENAI_API_KEY" in str(e):
+            print("You need to set your OPENAI_API_KEY environment variable.")
+            print("You can get one from https://beta.openai.com/")
+            print("Then run the following command:")
+            print("export OPENAI_API_KEY=<your key>")
+            print("You can add this to your ~/.bashrc or ~/.bash_profile")
+            return
+    print(WELCOME)
+    while True:
+        instruction = input(">")
+        if instruction == "exit" or instruction == "quit" or instruction == "q":
+            print("Goodbye 👋")
+            break
+        else:
+            pass
+
+
+if __name__ == "__main__":
+    main()

setup.py

@@ -17,7 +17,8 @@
     url="https://github.com/whitead/sanclone",
     license="MIT",
     packages=["sanclone", "sanclone.tools"],
-    install_requires=["langchain", "biopython"],
+    install_requires=["langchain", "biopython", "click"],
+    entry_points={"console_scripts": ["sanclone = sanclone.main:main"]},
     test_suite="tests",
     long_description=long_description,
     long_description_content_type="text/markdown",