4 ms·

def doappend_dwim(arg = []): arg.append('a') return arg assert(doappend_dwim([]) == ['a']) assert(doappend_dwim() == ['a']) assert(doappend_dwim() == ['a

by cheez 12y ago

def doappend_dwim(arg = []): arg.append('a') return arg assert(doappend_dwim([]) == ['a']) assert(doappend_dwim() == ['a']) assert(doappend_dwim() == ['a','a'])