20 Useful Python Code Snippets for Everyday Programming

In this article we share twenty useful Python code snippets to help you tackle everyday programming challenges, ranging from a simple HTTP server to memory size measurement and class creation.

1. Simple HTTP Web Server

<code># 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</code>

2. One‑Liner Loop Through List

<code># One Liner Loop throught 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]</code>

3. Update Dictionary

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

4. Split Multi‑Line String

<code># Split Multi Lines String
string = "Data \n is encrpted \nby Python"
print(string)
# Output
# Data
# is encrpted
# by Python
splited = string.split("\n")
print(splited)  # ['Data ', ' is encrpted ', ' by Python']</code>

5. Track Frequency of List Elements

<code># Track Frequency 
import collections
def Track_Frequency(List):
    return dict(collections.Counter(List))
print(Track_Frequency([10, 10, 12, 12, 10, 13, 13, 14]))
# Output
# {10: 3, 12: 2, 13: 2, 14: 1}</code>

6. Read CSV Without Pandas

<code># Simple Class Creation
import csv
with open("Test.csv", "r") as file:
    read = csv.reader(f)
    for r in read:
        print(row)
# Output
# ['Sr', 'Name', 'Profession']
# ['1', 'Haider Imtiaz', 'Back End Developer']
# ['2', 'Tadashi Wong', 'Software Engineer']</code>

7. Squash List of Strings

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

8. Get Index of Elements in List

<code># Get index of elements in list
mylist = [10, 11, 12, 13, 14]
print(mylist.index(10))
print(mylist.index(12))
print(mylist.index(14))</code>

9. Magic of *arg

<code># Magic of *arg
def func(*arg):
    num = 0
    for x in arg:
        num = num + x
    print(num)  # 600
func(100, 200, 300)</code>

10. Get Type of Any Data

<code># 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'>
</code>

11. Modify Print Formatting

<code># Modify print functionality
print("Top Programming Languages are %r, %r and %r" % ('Py', 'Js', 'C#'))
# Output
# Top Programming Languages are 'Py', 'Js' and 'C#'
</code>

12. Convert Strings to Lowercase

<code># String to lowercase
data1 = "KuaiXue"
data2 = "Python"
data3 = "Kx Python"
print(data1.lower())
print(data2.lower())
print(data3.lower())
</code>

13. Quick Variable Swap

<code># Quick Way to Exchange Variables
d1 = 25
d2 = 50
d1, d2 = d2, d1
print(d1, d2)  # 50 25
</code>

14. Print with Custom Separator

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

15. Fetch Web Page HTML

<code># First Install Request with pip install requests
import requests
r = requests.get("https://www.baidu.com/")
print(r)
</code>

16. Get Memory Size of Data

<code># Get Memory taken by data
import sys
def memory(data):
    return sys.getsizeof(data)
print(memory(100))  # 28
print(memory("Pythonnnnnnn"))  # 61
</code>

17. Simple Class Creation

<code># 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)
</code>

18. String Multiplier

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

19. Chain Comparison

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

20. Digitizing an Integer

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

These snippets demonstrate concise Python techniques that can be directly copied into your projects to improve productivity and readability.