In [3]:

    

list = [1,2,3,]


    

In [4]:

    

len(list)


    

    
Out[4]:





3

In [1]:

    

list = ['string data type', 23.23, 100]


    

In [2]:

    

len(list)


    

    
Out[2]:





3

In [3]:

    

list2 = ['one', 'a', 'twenty']


    

In [4]:

    

list2[0] #indexing


    

    
Out[4]:





'one'

In [5]:

    

list2[::1] #slicing


    

    
Out[5]:





['one', 'a', 'twenty']

In [6]:

    

list2[1::] #more slicing


    

    
Out[6]:





['a', 'twenty']

In [7]:

    

list2[0:2:1] #even more slicing


    

    
Out[7]:





['one', 'a']

In [10]:

    

list + list2 #concatination


    

    
Out[10]:





['string data type', 23.23, 100, 'one', 'a', 'twenty']

In [11]:

    

(list + list2)[3:5:1] #concatination with slicing


    

    
Out[11]:





['one', 'a']

In [15]:

    

(list + list2)[3]#concatination and indexing


    

    
Out[15]:





'one'

In [16]:

    

list3 = list + list2


    

In [17]:

    

list3


    

    
Out[17]:





['string data type', 23.23, 100, 'one', 'a', 'twenty']

In [20]:

    

list3.append('another entry')


    

In [22]:

    

len(list3)


    

    
Out[22]:





8

In [31]:

    

list3[7] = 'CAPITALISED'


    

In [32]:

    

list3


    

    
Out[32]:





['string data type',
 23.23,
 100,
 'one',
 'a',
 'twenty',
 'another entry',
 'CAPITALISED']

In [33]:

    

list3.remove('another entry')


    

In [34]:

    

list3


    

    
Out[34]:





['string data type', 23.23, 100, 'one', 'a', 'twenty', 'CAPITALISED']

In [35]:

    

list3.reverse()


    

In [36]:

    

list3


    

    
Out[36]:





['CAPITALISED', 'twenty', 'a', 'one', 100, 23.23, 'string data type']

In [39]:

    

list3.count(100)


    

    
Out[39]:





1

In [42]:

    

list3.count('a') #count the quantity of specified items in the current list


    

    
Out[42]:





1

In [43]:

    

list4 = ['a','a',2,'a','two','a',2,'a','counters','counters','counters']


    

In [44]:

    

list4


    

    
Out[44]:





['a', 'a', 2, 'a', 'two', 'a', 2, 'a', 'counters', 'counters', 'counters']

In [46]:

    

c_one = list4.count('a') #Allocate data to variables
c_two = list4.count(2)
c_three = list4.count('counters')
print(c_one, c_two, c_three) #print them for the counting exercise


    

    




5 2 3

In [48]:

    

list4.pop()#removes last index and returns it.


    

    
Out[48]:





'counters'

In [51]:

    

mypopped = list4.pop()


    

In [52]:

    

mypopped


    

    
Out[52]:





'a'

In [53]:

    

list4


    

    
Out[53]:





['a', 'a', 2, 'a', 'two', 'a', 2]

In [60]:

    

list4.insert(1, 2)


    

In [62]:

    

list4.pop(3) #popping from the index location


    

    
Out[62]:





'a'

In [63]:

    

list4


    

    
Out[63]:





['a', 2, 'a', 'a', 'two', 'a', 2, 'a']

In [64]:

    

newlist = ['a','d','x','delta']
numlist = [1287, 89765, 354, 23, 6890, 457, 9, 0, 3, 2, 1]


    

In [65]:

    

newlist.sort()


    

In [66]:

    

newlist


    

    
Out[66]:





['a', 'd', 'delta', 'x']

In [67]:

    

numlist.sort()


    

In [68]:

    

numlist


    

    
Out[68]:





[0, 1, 2, 3, 9, 23, 354, 457, 1287, 6890, 89765]

In [69]:

    

numlistsorted = numlist.sort()


    

In [70]:

    

type(numlist)


    

    
Out[70]:





list

In [72]:

    

type(numlistsorted) #no type as the method has not been called


    

    
Out[72]:





NoneType

In [73]:

    

None # Is very useful for a method or function which return nothing (helper methods maybe? - look up uses).


    

In [79]:

    

numlist.sort()
mysortednumlist = numlist # The proper way to do it, call the method, add the result to the malloc (variable).


    

In [81]:

    

mysortednumlist # Call the variable


    

    
Out[81]:





[0, 1, 2, 3, 9, 23, 354, 457, 1287, 6890, 89765]

In [82]:

    

numlist.reverse()


    

In [83]:

    

numlist


    

    
Out[83]:





[89765, 6890, 1287, 457, 354, 23, 9, 3, 2, 1, 0]

In [ ]: