try: 
    requirements = open("requirements.txt", "w")
    requirements.write(
      "scikit-learn >= 0.24.2, < 0.25.0", 
      "numpy >= 1.21.2, < 1.22.0",
      "pandas >= 1.3.3, < 1.4.0"
    )
    random_error = 25 / 0 # raises a 0 divide exception
    requirements.close() # this is skipped 
except: 
   print("An error occurred.")