import copyb = copy.copy(a)

>>> a=[1,['a']]>>> b=a>>> c=copy.copy(a)>>> a[1, ['a']]>>> b[1, ['a']]>>> c[1, ['a']]>>> id(a)140556196249680>>> id(b)140556196249680>>> id(c)140556298139120>>> a[0]=2>>> a[2, ['a']]>>> c[1, ['a']]>>>a[1].append('b')>>>a[2,['a','b']]>>>c[1,['a','b']]

import copyb = copy.deepcopy(a)

>>> a=[1,2,['a','b']]>>> b=copy.deepcopy(a)>>> a[1, 2, ['a', 'b']]>>> b[1, 2, ['a', 'b']]>>> id(a)140556196175952>>> id(b)140556196501336>>> id(a[0])11961144>>> id(b[0])11961144>>> id(a[2])140556196424448>>> id(b[2])140556196250472>>> a[0]=3>>> a[2].append('c')>>> a[3, 2, ['a', 'b', 'c']]>>> b[1, 2, ['a', 'b']]