Python Tutorials---A few tips that beginners should know

Beginners often do not know some skills in coding, so the code will be very long, very complex, the following will introduce a few novice should know a few tips to simplify the code.

1. Invert strings

>>> a =  "codementor"print"Reverseis" , a[::-1 is Rotnemedoc

2. Transpose The Matrix

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

3. Store the list data separately in a separate variable

>>> a = [1, 2, 3]>>> x, y, z =>>> x1>>> y2>> ;> Z3

4. Merging the list of strings into a single new string

>>> a = ["Code","mentor","Python ","Developer"]                                                                         print""  . Join (a)                                                                                 Code mentor Python Developer  

5. One line of code swap two variables

>>> a=7>>> b=5>>> B, a =A, b>>> a5>>> b7

6. Do not cycle print "Codecodecodecode mentormentormentormentormentor"

Print " Code "*4+" +"mentor"Codecodecodecode Mentormentormentormentormentor

7. Merging the list of arrays into a single whole

Import>>>a = [[1, 2], [3, 4], [5, 6]]>>> list (itertools.chain.from_ Iterable (a)) [1, 2, 3, 4, 5, 6]

8. Speak only numeric string conversion to List

>>> result = Map (lambda  x:int (x), Raw_input (). Split ())1 2 3 4>>> result[1, 2, 3, 4]

Reference: Https://www.codementor.io/python/tutorial/python-tricks-for-beginners

Python Tutorials---A few tips that beginners should know