Data structures

Lists

List = comma-separated hetereogenous values (items) between square brackets



In [5]:

    
A = [1, 2, 5, 7, 9]
B = ['Riri', 'Fifi', 'Loulou']
C = ['a', 1, 2, None, True]



In [13]:

    
print(A[0]); print(A[2]); print(B[:2]); print(B[2:]); print(C[2:4])









    



1
5
['Riri', 'Fifi']
['Loulou']
[2, None]

Negative indexing and slicing works



In [14]:

    
print(A[-1]); print(A[:-1]); print(C[2:-1])









    



9
[1, 2, 5, 7]
[2, None]



In [20]:

    
A + B









    Out[20]:





[1, 2, 5, 7, 9, 'Riri', 'Fifi', 'Loulou']



In [17]:

    
len(A)









    Out[17]:





5



In [19]:

    
[A, B]









    Out[19]:





[[1, 2, 5, 7, 9], ['Riri', 'Fifi', 'Loulou']]



In [27]:

    
A = [1, 2, 3, 4, 5]
A[2:4] = []
print(A)
A[1:2] = [10, 20]
print(A)









    



[1, 2, 5]
[1, 10, 20, 5]



In [26]:

    
B.append('Picsou')
print(B)









    



['Riri', 'Fifi', 'Loulou', 'Picsou', 'Picsou']

Lists are mutable !



In [ ]: