Essential Python Tips And Tricks For Programmers

Python is one of the most preferred languages out there. Its brevity and high readability makes it so popular among all programmers. So here are few of the tips and tricks you can use to bring up your Python programming game. 1. In-Place Swapping Of Two Numbers. 

Python3

x, y = 10, 20
print(x, y)
x, y = y, x
print(x, y)

Output:

10 20
20 10

2. Reversing a string in Python 

Python3

a = "GeeksForGeeks"
print("Reverse is", a[::-1])

Output:

Reverse is skeeGroFskeeG

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

Python3

a = ["Geeks", "For", "Geeks"]
print(" ".join(a))

Output:

Geeks For Geeks

4. Chaining Of Comparison Operators.

Python3

n = 10
result = 1 < n < 20
print(result)
result = 1 > n <= 9
print(result)

Output:

True
False

4. Print The File Path Of Imported Modules.

Python3

import os
import socket

print(os)
print(socket)

Output:

<module 'os' from '/usr/lib/python3.5/os.py'>
<module 'socket' from '/usr/lib/python3.5/socket.py'>

5. Use Of Enums In Python.

Python3

class MyName:
    Geeks, For, Geeks = range(3)

print(MyName.Geeks)
print(MyName.For)
print(MyName.Geeks)

Output:

2
1
2

6. Return Multiple Values From Functions.

Python3

def x():
    return 1, 2, 3, 4
a, b, c, d = x()

print(a, b, c, d)

Output:

1 2 3 4

7. Find The Most Frequent Value In A List.

Python3

test = [1, 2, 3, 4, 2, 2, 3, 1, 4, 4, 4]
print(max(set(test), key = test.count))

Output:

4

8. Check The Memory Usage Of An Object.

Python3

import sys
x = 1
print(sys.getsizeof(x))

Output:

28

9. Print string N times.

Python3

n = 2
a = "GeeksforGeeks"
print(a * n)

Output:

GeeksforGeeksGeeksforGeeks

10. Checking if two words are anagrams

Python3

from collections import Counter
def is_anagram(str1, str2):
     return Counter(str1) == Counter(str2)

# or without having to import anything
def is_anagram(str1, str2):
    return sorted(str1) == sorted(str2)

print(is_anagram('geek', 'eegk'))
print(is_anagram('geek', 'peek'))

Output:

True
False

11. Sorting the dictionary according to key and value

Python3

x={1:3,4:2,5:1,2:9}
#sorting the dictionary according to value
print(sorted(x.items(),key=lambda a:a[1]))
#sorting the dictionary according to key
print(sorted(x.items(),key=lambda a:a[0]))

References: 1.10 Neat Python Tricks Beginners Should Know 2.30 Essential Python Tips And Tricks For Programmers