On 0, alan.gauld@bt.com wrote: > > def intersect_eas(L1, L2): > > '''The easiest way for Alan G, requires nested_scopes''' > > return filter(lambda x: (x in L2), L1) > > How does it require nested scopes? > lambda and filter are builtin, > and x,L1 and L2 are all locals. L1 and L2 are not locals inside the lambda. They're only visible with nested scopes. -- Remco Gerlich