pep8 fixes to cylinders_porosity
@@ -858,7 +858,7 @@ def cylinders_porosity(shape, radius: int ,porosity:float, phi_max: float =0, t
n_pixels_from_poro = lambda poro: -np.log(poro)*vol_total
# Crudely estimate fiber length as cube root of product of dims if not input.
- if length==None:
+ if length is None:
length_est = (shape[0]*shape[1]*shape[2])**(1./3)
else:
length_est = length
