Trick #1

Reversing a string in Python

>>> a = "codementor" >>> print "Reverse is",a[::-1] Reverse is rotnemedoc

Trick #2

Transposing a Matrix

>>> mat = [[1, 2, 3], [4, 5, 6]] >>> zip(*mat) [(1, 4), (2, 5), (3, 6)]

Trick #3

a = [1,2,3]

Store all three values of the list in 3 new variables

>>> a = [1, 2, 3] >>> x, y, z = a >>> x 1 >>> y 2 >>> z 3

Trick #4

a = ["Code", "mentor", "Python", "Developer"]

Create a single string from all the elements in list above.

>>> print " ".join(a) Code mentor Python Developer

Trick #5

List 1 = ['a', 'b', 'c', 'd']

List 2 = ['p', 'q', 'r', 's']

Write a Python code to print

ap

bq

cr

ds

>>> for x, y in zip(list1,list2): ... print x, y ... a p b q c r d s

Trick #6

Swap two numbers with one line of code.

>>> a=7 >>> b=5 >>> b, a =a, b >>> a 5 >>> b 7

Trick #7

Print "codecodecodecode mentormentormentormentormentor" without using loops

>>> print "code"*4+' '+"mentor"*5 codecodecodecode mentormentormentormentormentor

Trick #8

a = [[1, 2], [3, 4], [5, 6]]

Convert it to a single list without using any loops.

>>> import itertools >>> list(itertools.chain.from_iterable(a)) [1, 2, 3, 4, 5, 6]

Trick #9

Checking if two words are anagrams

def is_anagram(word1, word2): """Checks whether the words are anagrams. word1: string word2: string returns: boolean """

Complete the above method to find if two words are anagrams.

from collections import Counter def is_anagram(str1, str2): return Counter(str1) == Counter(str2) >>> is_anagram('abcd','dbca') True >>> is_anagram('abcd','dbaa') False

Trick #10.

Taking a string input.

For example "1 2 3 4" and return [1, 2, 3, 4]

Remember list being returned has integers in it.

Don't use more than one line of code.