Amazing hacks of Python

Python is indeed one of the smart and most trending languages. Here are some cool hacks that make python superb among all other languages.

List comprehensions: List comprehension is the best and efficient technique to get rid of writing unnecessary lines of code. Read Article to know more.
Printing a list: The list is not printed according to the user’s requirement. They are always printed in unwanted square brackets and single quotes. But there is a trivial solution to print the list efficiently by using the string’s join method.
The join method turns the list into a string by casting each item into a string and connecting them with the string that joins was called on.

Python

# Declaring the list geek  

geek = ['Geeks', 'Programming', 'Algorithm', 'Article']  

# Directly printing the list  

print ("Simple List:", geek)  

# Printing the list by join method  

print ('List by using join method: %s' % ', ' .join(geek))  

# Direct use of join method  

print ('Direct apply the join method:',(", " .join(geek)))

Output: 
Simple List: ['Geeks', 'Programming', 'Algorithm', 'Article']
List by using join method: Geeks, Programming, Algorithm, Article
Direct apply the join method: Geeks, Programming, Algorithm, Article

Cool Zip tricks

Transpose a matrix: You can Read Here about this.
Partition a list into N groups: We used iter() as an iterator over a sequence.

Python3

    
# Declaring the list geek 

geek = ['Sun', 'Flowers', 'Peoples', 'Animals', 'Day', 'Night'] 

partition = list(zip (*[iter(geek)] * 2)) 

print (partition)

Output: 
[('Sun', 'Flowers'), ('Peoples', 'Animals'), ('Day', 'Night')]

Explanation: [iter(geek)] * 2 produces a list containing 2 items of geek[] list, i.e. a list of length 2. *arg unpacks a sequence into arguments for a function call. Therefore we are passing the same iterator 2 times to zip().

Printing more than one list’s items simultaneously

Python

list1 = [1, 3, 5, 7] 

list2 = [2, 4, 6, 8] 

# Here zip() function takes two equal length list and merges them 
# together in pairs 

for a, b in zip(list1,list2): 

    print (a, b)

Output: 
1 2
3 4
5 6
7 8

Take the string as input and convert it into the list:

Python3

# Reads a string from input and type case them to int  
# after splitting to white-spaces 

formatted_list = list(map(int, input().split())) 

print(formatted_list)

Input:
2 4 5 6
Output:
[2, 4, 5, 6]

Convert the list of list into a single list

Python3

# import the itertools  

import itertools  

# Declaring the list geek  

geek = [[1, 2], [3, 4], [5, 6]]  

# chain.from_iterable() function returns the 
# elements of nested list  
# and iterate from first list  
# of iterable till the last  
# end of the list  

lst = list(itertools.chain.from_iterable(geek))  

print(lst)

Output: 
[1, 2, 3, 4, 5, 6]

Printing the repeated characters: The task is to print the pattern like this Geeeeekkkkss. So we can easily print this pattern without using it for a loop.

Python

# + used for string concatenation  
# To repeat the character n times, just multiply n   
# with that character    

print ("G" + "e"*5 + "k"*4 + "s"*2)

Output:
Geeeeekkkkss

Article Tags :

Python