20 Essential Python Code Snippets to Boost Your Programming Skills

This article presents twenty practical Python code snippets that demonstrate common tasks—from building a simple HTTP server and manipulating lists and dictionaries to reading CSV files, creating classes, and performing memory profiling—providing developers with ready-to-use examples to enhance their coding efficiency.

1. Simple HTTP Web Server

# Simple HTTP SERVER
import socketserver
import http.server
PORT = 8000
handler = http.server.SimpleHTTPRequestHandler
with socketserver.TCPServer(("", PORT), handler) as http:
    print("Server Launch at Localhost: " + str(PORT))
    http.serve_forever()
# Type in http://127.0.0.1:8000/ in your webbrowser

2. One‑Liner Loop Through List

# One Liner Loop through List
mylist = [10, 11, 12, 13, 14]
print([i * 2 for i in mylist])  # [20, 22, 24, 26, 28]
print([i * 5 for i in mylist])  # [50, 55, 60, 65, 70]

3. Update Dictionary

# Update Dictionary
mydict = {1: "Python", 2: "JavaScript", 3: "Csharp"}
mydict.update({4: "Dart"})
print(mydict)  # {1: 'Python', 2: 'JavaScript', 3: 'Csharp', 4: 'Dart'}

4. Split Multi‑Line String

# Split Multi Lines String
string = "Data 
 is encrpted 
 by Python"
print(string)
# Output
# Data
# is encrpted
# by Python
splited = string.split("
")
print(splited)  # ['Data ', ' is encrpted ', ' by Python']

5. Track Frequency

# Track Frequency
import collections

def Track_Frequency(lst):
    return dict(collections.Counter(lst))

print(Track_Frequency([10, 10, 12, 12, 10, 13, 13, 14]))
# Output
# {10: 3, 12: 2, 13: 2, 14: 1}

6. Read CSV Without Pandas

# Simple CSV Reading
import csv
with open("Test.csv", "r") as file:
    reader = csv.reader(file)
    for row in reader:
        print(row)
# Example Output
# ['Sr', 'Name', 'Profession']
# ['1', 'Haider Imtiaz', 'Back End Developer']
# ['2', 'Tadashi Wong', 'Software Engineer']

7. Squash List of Strings

# Squash list of String
mylist = ["I learn", "Python", "JavaScript", "Dart"]
string = " ".join(mylist)
print(string)  # I learn Python JavaScript Dart

8. Get Index of Element in List

# Get Index of Element in List
mylist = [10, 11, 12, 13, 14]
print(mylist.index(10))  # 0
print(mylist.index(12))  # 2
print(mylist.index(14))  # 4

9. Magic of *arg

# Magic of *arg
def func(*arg):
    num = 0
    for x in arg:
        num = num + x
    print(num)  # 600

func(100, 200, 300)

10. Get Type of Any Data

# Get Type of Any Data
data1 = 123
data2 = "Py"
data3 = 123.443
data4 = True
data5 = [1, 2]
print(type(data1))  # <class 'int'>
print(type(data2))  # <class 'str'>
print(type(data3))  # <class 'float'>
print(type(data4))  # <class 'bool'>
print(type(data5))  # <class 'list'>

11. Modified Print Function

# Modified Print Function
print("Top Programming Languages are %r, %r and %r" % ('Py', 'Js', 'C#'))
# Output
# Top Programming Languages are 'Py', 'Js' and 'C#'

12. Decapitalize String

# Decapitation of String
data1 = "ABCD"
data2 = "Py"
data3 = "Learn Coding"
print(data1.lower())  # abcd
print(data2.lower())  # py
print(data3.lower())  # learn coding

13. Quick Variable Swap

# Quick Way to Exchange Variables
d1 = 25
d2 = 50
d1, d2 = d2, d1
print(d1, d2)  # 50 25

14. Print with Separation

# Print with Separation
print("Py", "Js", "C#", sep="-")  # Py-Js-C#
print("100", "200", "300", sep="x")  # 100x200x300

15. Fetch Webpage HTML

# First Install Request with pip install requests
import requests
r = requests.get("https://medium.com/@codedev101")
print(r)  # Whole page html data will display

16. Get Memory Used by Data

# Get Memory taken by data
import sys

def memory(data):
    return sys.getsizeof(data)

print(memory(100))          # 28
print(memory("Pythonnnnnnn"))  # 61

17. Simple Class Creation

# Simple Class Creation
class Employee:
    def __init__(self, empID):
        self.empID = empID
        self.name = "Haider"
        self.salary = 50000
    def getEmpData(self):
        return self.name, self.salary

emp = Employee(189345)
print(emp.getEmpData())  # ('Haider', 50000)

18. String Multiplier

# String Multiplier
# Normal way
for x in range(5):
    print("C#")
# Good way
print("C# " * 5)  # C# C# C# C# C#

19. Chain Comparison

# Chain Comparison
a = 5
print(1 == a < 2)  # False
print(2 < 3 < 6 > a)  # True

20. Digitizing an Integer

# Digitizing
integer = 234553
digitz = [int(i) for i in str(integer)]
print(digitz)  # [2, 3, 4, 5, 5, 3]

These snippets illustrate concise, reusable patterns that can accelerate everyday Python development.