On Wed, Dec 10, 2014 at 9:10 AM, Jean-Michel Pichavant < jeanmic...@sequans.com> wrote: > If you like one-liners, > > def __init__(self, center=(0,0), radius=10, mass=None): > self.center = center > self.radius = radius > self.mass = (mass is None and radius**2) or mass
If mass is None and radius is 0, then self.mass gets set to None. Use the actual ternary operator instead.
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