How can the memoize cache be cleared?

The decorator works by injecting a dictionnary in the function

You can manually clear that dictionnary:

@memoize
def square (x):
  return x*x

square(2)
square(3)

print square.__dict__
# {'cache': {(2,): 4, (3,): 9}}

square.cache.clear()
print square.__dict__
# {'cache': {}}

You can use module1.method1.cache.clear() in your TearUp method