sort() method for Sorting a list in different orders and using functions

All list methods

sort(reverse,key) takes two optional arguments .

reverse : True or False , by default reverse=False
key : the function to use for sorting

Returns None ( only sort the list without returning ).

my_list=['Ronald','John','Alex','Ravi']
my_list.sort()
print(my_list)

Output

['Alex', 'John', 'Ravi', 'Ronald']

my_list=[4,2,7,1]
my_list.sort() # by default ascending 
print(my_list)

Output is here

[1, 2, 4, 7]

reverse=True

my_list=[4,2,7,1]
my_list.sort(reverse=True) # Descending  order
print(my_list) # Output  [7, 4, 2, 1]

Using key

Length of the string is used for sorting.

my_list=['ab','xa','dc','Cxx','yzza','Z','b']
my_list.sort(key=len)
print(my_list)

Output

['Z', 'b', 'ab', 'xa', 'dc', 'Cxx', 'yzza']

Using reverse

Length of the string in reverse order is used ( maximum to minimum )

my_list=['ab','xa','dc','Cxx','yzza','Z','b']
my_list.sort(key=len,reverse=True)
print(my_list)

Output

['yzza', 'Cxx', 'ab', 'xa', 'dc', 'Z', 'b']

Return None

Here output is None

my_list=[4,2,7,1]
my_list=my_list.sort()
print(my_list) # None

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sort() method to sort a list

Using key

Using reverse

Return None

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