Example of doing lazy imports before Python 3.15

lazy_import_example.py

import importlib.util
import sys
import time
    
def lazy_import(name):
    # Find module spec
    spec = importlib.util.find_spec(name)
    # Wrap loader with LazyLoader
    loader = importlib.util.LazyLoader(spec.loader)
    spec.loader = loader
    # Create module object
    module = importlib.util.module_from_spec(spec)
    # Register in sys.modules
    sys.modules[name] = module
    # This does NOT execute module yet
    loader.exec_module(module)
    return module
    

# Measure imports
start_imports = time.time()

torch = lazy_import("torch")
transformers = lazy_import("transformers")
pd = lazy_import("pandas")
pyplt = lazy_import("matplotlib.pyplot")
sns = lazy_import("seaborn")

end_imports = time.time()

print(f"[DEBUG] Import time: {end_imports - start_imports:.2f} sec")
# To show that this works!
data = ["Good","Nice","Not good", "Bad"]
df = pd.DataFrame({"text": data})
print(df)