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Lists In Python Interview Question

· 2 min read
Kaustubh Kulkarni

Consider a list (list = []). You can perform the following commands:

  1. insert i e: Insert integer e at position i.
  2. print: Print the list.
  3. remove e: Delete the first occurrence of integer e.
  4. append e: Insert integer e at the end of the list.
  5. sort: Sort the list.
  6. pop: Pop the last element from the list.
  7. reverse: Reverse the list.

Initialize your list and read in the value of n followed by n lines of commands where each command will be of the 7 types listed above. Iterate through each command in order and perform the corresponding operation on your list.

Example N=4

append 1

append 2

insert 3 1


[1, 3, 2]

input Format

The first line contains an integer, , denoting the number of commands. Each line of the subsequent lines contains one of the commands described above.


  • The elements added to the list must be integers.

Output Format

For each command of type print, print the list on a new line.

Sample input 0

insert 0 5
insert 1 10
insert 0 6
remove 6
append 9
append 1

Sample Output 0

[6, 5, 10]
[1, 5, 9, 10]
[9, 5, 1]

if __name__ == '__main__':
N = int(input())
commands = {
"insert": lambda x, y, z: x.insert(y, z),
"print": lambda x: print(x),
"remove": lambda x, y: x.remove(y),
"append": lambda x, y: x.append(y),
"sort": lambda x: x.sort(),
"pop": lambda x: x.pop(),
"reverse": lambda x: x.reverse(),
out = []
for i in range(N):
a = input()
split_a = a.split(' ')
command = split_a[0]
commands[command](out, int(split_a[1]), int(split_a[2]))
except IndexError:
commands[command](out, int(split_a[1]))
except IndexError:


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