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In [1]:

    
filters = ['abc', 'bcd', 'cde']
pktbl = ['abc', 'bcd', 'cde']
', '.join(list(set(pktbl)-set(filters)))









    Out[1]:





''



In [2]:

    
filters.remove('abc')
filters









    Out[2]:





['bcd', 'cde']



In [3]:

    
d = {'a':1}



In [4]:

    
d.get('b', 0)









    Out[4]:





0