In [1]:

    

l = [0, 10, 20, 30, 40, 50, 60]
print(l)


    

    




[0, 10, 20, 30, 40, 50, 60]

In [2]:

    

print(l[2:5])


    

    




[20, 30, 40]

In [3]:

    

print(l[:3])


    

    




[0, 10, 20]

In [4]:

    

print(l[3:])


    

    




[30, 40, 50, 60]

In [5]:

    

print(l[:])


    

    




[0, 10, 20, 30, 40, 50, 60]

In [6]:

    

print(l[2:10])


    

    




[20, 30, 40, 50, 60]

In [7]:

    

print(l[5:2])


    

    




[]

In [8]:

    

print(l[2:2])


    

    




[]

In [9]:

    

print(l[10:20])


    

    




[]

In [10]:

    

print(l[::2])


    

    




[0, 20, 40, 60]

In [11]:

    

print(l[1::2])


    

    




[10, 30, 50]

In [12]:

    

print(l[::3])


    

    




[0, 30, 60]

In [13]:

    

print(l[2:5:2])


    

    




[20, 40]

In [14]:

    

print(l[3:-1])


    

    




[30, 40, 50]

In [15]:

    

print(l[-2:])


    

    




[50, 60]

In [16]:

    

print(l[-5:-2])


    

    




[20, 30, 40]

In [17]:

    

print(l[5:2:-1])


    

    




[50, 40, 30]

In [18]:

    

print(l[2:5:-1])


    

    




[]

In [19]:

    

print(l[-2:-5:-1])


    

    




[50, 40, 30]

In [20]:

    

print(l[-2:2:-1])


    

    




[50, 40, 30]

In [21]:

    

print(l[5:2:-2])


    

    




[50, 30]

In [22]:

    

print(l[::-1])


    

    




[60, 50, 40, 30, 20, 10, 0]

In [23]:

    

sl = slice(2, 5, 2)
print(sl)


    

    




slice(2, 5, 2)

In [24]:

    

print(type(sl))


    

    




<class 'slice'>

In [25]:

    

print(l[sl])


    

    




[20, 40]

In [26]:

    

sl = slice(2, 5)
print(sl)


    

    




slice(2, 5, None)

In [27]:

    

print(l[sl])


    

    




[20, 30, 40]

In [28]:

    

sl = slice(2)
print(sl)


    

    




slice(None, 2, None)

In [29]:

    

print(l[sl])


    

    




[0, 10]

In [30]:

    

# sl = slice()
# TypeError: slice expected at least 1 arguments, got 0


    

In [31]:

    

sl = slice(None)
print(sl)


    

    




slice(None, None, None)

In [32]:

    

print(l[sl])


    

    




[0, 10, 20, 30, 40, 50, 60]

In [33]:

    

print(l)


    

    




[0, 10, 20, 30, 40, 50, 60]

In [34]:

    

l[2:5] = [200, 300, 400]
print(l)


    

    




[0, 10, 200, 300, 400, 50, 60]

In [35]:

    

l[2:5] = [-2, -3]
print(l)


    

    




[0, 10, -2, -3, 50, 60]

In [36]:

    

l[2:4] = [2000, 3000, 4000, 5000]
print(l)


    

    




[0, 10, 2000, 3000, 4000, 5000, 50, 60]

In [37]:

    

l[2:6] = [20000]
print(l)


    

    




[0, 10, 20000, 50, 60]

In [38]:

    

# l[2:3] = 200
# TypeError: can only assign an iterable


    

In [39]:

    

l[1:4] = []
print(l)


    

    




[0, 60]

In [40]:

    

l[20:60] = [-1, -2, -3]
print(l)


    

    




[0, 60, -1, -2, -3]

In [41]:

    

l[2:2] = [-100]
print(l)


    

    




[0, 60, -100, -1, -2, -3]

In [42]:

    

print(l[:5:2])


    

    




[0, -100, -2]

In [43]:

    

l[:5:2] = [100, 200, 300]
print(l)


    

    




[100, 60, 200, -1, 300, -3]

In [44]:

    

# l[:5:2] = [100, 200]
# ValueError: attempt to assign sequence of size 2 to extended slice of size 3


    

In [45]:

    

l_2d = [[0, 1, 2], [3, 4, 5], [6, 7, 8], [9, 10, 11]]
print(l_2d)


    

    




[[0, 1, 2], [3, 4, 5], [6, 7, 8], [9, 10, 11]]

In [46]:

    

print(l_2d[1:3])


    

    




[[3, 4, 5], [6, 7, 8]]

In [47]:

    

print([l[:2] for l in l_2d[1:3]])


    

    




[[3, 4], [6, 7]]

In [48]:

    

l_2d_t = [list(x) for x in zip(*l_2d)]
print(l_2d_t)


    

    




[[0, 3, 6, 9], [1, 4, 7, 10], [2, 5, 8, 11]]

In [49]:

    

print(l_2d_t[1])


    

    




[1, 4, 7, 10]

In [50]:

    

l = [0, 10, 20, 30, 40, 50, 60]
print(l)


    

    




[0, 10, 20, 30, 40, 50, 60]

In [51]:

    

l_slice = l[2:5]
print(l_slice)


    

    




[20, 30, 40]

In [52]:

    

l_slice[1] = 300
print(l_slice)


    

    




[20, 300, 40]

In [53]:

    

print(l)


    

    




[0, 10, 20, 30, 40, 50, 60]

In [54]:

    

l_2d = [[0, 1, 2], [3, 4, 5], [6, 7, 8], [9, 10, 11]]
print(l_2d)


    

    




[[0, 1, 2], [3, 4, 5], [6, 7, 8], [9, 10, 11]]

In [55]:

    

l_2d_slice = l_2d[1:3]
print(l_2d_slice)


    

    




[[3, 4, 5], [6, 7, 8]]

In [56]:

    

l_2d_slice[0][1] = 400
print(l_2d_slice)


    

    




[[3, 400, 5], [6, 7, 8]]

In [57]:

    

print(l_2d)


    

    




[[0, 1, 2], [3, 400, 5], [6, 7, 8], [9, 10, 11]]

In [58]:

    

import copy


    

In [59]:

    

l_2d = [[0, 1, 2], [3, 4, 5], [6, 7, 8], [9, 10, 11]]
print(l_2d)


    

    




[[0, 1, 2], [3, 4, 5], [6, 7, 8], [9, 10, 11]]

In [60]:

    

l_2d_slice_deepcopy = copy.deepcopy(l_2d[1:3])
print(l_2d_slice_deepcopy)


    

    




[[3, 4, 5], [6, 7, 8]]

In [61]:

    

l_2d_slice_deepcopy[0][1] = 400
print(l_2d_slice_deepcopy)


    

    




[[3, 400, 5], [6, 7, 8]]

In [62]:

    

print(l_2d)


    

    




[[0, 1, 2], [3, 4, 5], [6, 7, 8], [9, 10, 11]]

In [63]:

    

s = 'abcdefg'
print(s)


    

    




abcdefg

In [64]:

    

print(s[2:5])


    

    




cde

In [65]:

    

print(s[::-1])


    

    




gfedcba

In [66]:

    

# s[2:5] = 'CDE'
# TypeError: 'str' object does not support item assignment


    

In [67]:

    

t = (0, 10, 20, 30, 40, 50, 60)
print(t)


    

    




(0, 10, 20, 30, 40, 50, 60)

In [68]:

    

print(t[2:5])


    

    




(20, 30, 40)

In [69]:

    

# t[2:5] = (200, 300, 400)
# TypeError: 'tuple' object does not support item assignment