lazy import wave, traceback

try:
    help(globals()['wave'].resolve)  # However, a call ".resolve()" would work
except AttributeError as e:
    print(e)  # 'lazy_import' object has no attribute 'resolve'

try:
    help(globals()['wave'].resolve)
except AttributeError:
    # traceback.format_exc() initializes types.LazyImportType as a side effect.
    # This prints "AttributeError: 'lazy_import' object has no attribute 'resolve'".
    print(traceback.format_exc().splitlines()[-1])
 
print(globals()['wave'].resolve)  # Succeeds.