Update OpenAI key retrieval from environment variable

app.py

@@ -9,9 +9,7 @@ from dspy.teleprompt import BootstrapFewShot
 from dspy.teleprompt import BootstrapFewShotWithRandomSearch
 
 # Data handling
-import pandas as pd
-from google.colab import drive
-from google.colab import userdata
+# import pandas as pd
 
 # Calculations and formatting
 import re
@@ -29,7 +27,7 @@ pdf_examples_dir = './pdfexamples/'
 
 model = dspy.OpenAI(
     model='gpt-3.5-turbo-0125',
-    api_key=userdata.get('OPENAI_PROJECT_KEY'),
+    api_key=os.getenv('OPENAI_PROJECT_KEY'),
     max_tokens=2000,
     temperature=0.01)