Utility Programs and Miscellaneous Examples

names = ['Ann','Bob']
template = 'Hello {name}, welcome.'
msgs = [template.format(name=n) for n in names]
print('\n'.join(msgs))

Hello Ann, welcome.
Hello Bob, welcome.

import random
random.seed(0)
suits = ['H','D','C','S']
ranks = ['A','2','3','4','5','6','7','8','9','10','J','Q','K']
deck = [r+s for s in suits for r in ranks]
random.shuffle(deck)
print(deck[:5])

['7C', '5H', 'QD', '2S', '3D']

import calendar
print(calendar.month(2025, 1))

    January 2025
Mo Tu We Th Fr Sa Su
       1  2  3  4  5
 6  7  8  9 10 11 12
13 14 15 16 17 18 19
20 21 22 23 24 25 26
27 28 29 30 31

from PIL import Image
img = Image.new('RGB', (640, 480))
print(img.size)

(640, 480)

a = {'x':1}
b = {'y':2}
c = {**a, **b}
print(c)

{'x': 1, 'y': 2}

lst = ['a','b','c']
for i, v in enumerate(lst):
    print(i, v)

0 a
1 b
2 c

def chunks(lst, n):
    return [lst[i:i+n] for i in range(0, len(lst), n)]
print(chunks([1,2,3,4,5], 2))

[[1, 2], [3, 4], [5]]

s = '3.14'
print(float(s))
print(int(float(s)))

3.14
3

print([1,2,3][-1])

3

import random
random.seed(0)
print(random.choice([10,20,30]))

20

class A: pass
print(A().__class__.__name__)

A

n = 1234
print(int(str(n)[::-1]))

4321

def anagram(a,b):
    return sorted(a.replace(' ','').lower()) == sorted(b.replace(' ','').lower())
print(anagram('listen','silent'))

True

import itertools
s = 'abc'
perms = [''.join(p) for p in itertools.permutations(s)]
print(perms)

['abc', 'acb', 'bac', 'bca', 'cab', 'cba']

for i in range(3,0,-1):
    print(i)

3
2
1

print(b'hello'.decode('utf-8'))

hello

import math
print(math.sqrt(16))

4.0