practice.py

#swap the elements in list, string, tuple, set and dictionary
# l1 = [2,3,4,5,6,7]
# l1[0] = l1[3]
# # print(l1)
# s = "this is great"
# # s = s.split()
# for i in range(3):
#     for j in range(3):
#         s[i] = s[j]
# print(s)
# s = {3,4,5,6}
# s = (3,4,5) #in tiple indexing is possible but not in sets

# print(s[1])

#string rotation
# s = "this"
# n = int(len(s)/2)
# print(s[n:]+s[:n])
# removing digits from string
# s = "alpha23"
# s1 = ""
# l = []
# for i in s:
#     if i.isnumeric():
#         l.append(i)
#     else:
#         s1+=i
# print(s1)
# example of picking 
# import pickle
# with open("piko.txt",'bw') as file:
#     k = "this is my brain!"
#     pickle.dump(k,file)

# l = [34,56,12,21,23]
# for i in range(len(l)):
#     for j in range(len(l)):
#         if l[i]>l[j]:
#             l[i],l[j] = l[j],l[i]
# print(l)
# l1 = [4,5,6,7]
# l2 = [8,9,2,1]
# l4 = list(zip(l1,l2))
# print(l4)
# l3 = [i+j for i,j in zip(l1,l2)]
# print(l3)

#star pattern
# for i in range(5):
#     print(" "*(4-i),"*"*(i*2+1),end = " ")
#     print()
# remove duplicacy from string
# s = "thisismypen"
# s1 = ""
# l = ""
# for i in s:
#     if i not in l:
#         l+=i
#     else:
#         s1+=i

# print(s1,l)


# vowel detection
# v = "aeiou"
# w = ""
# n_w = ""
# s = "thisisgreat"
# for i in s:
#     if i in v:
#         n_w+=i
#     else:
#         w+=i
# print(w,n_w)
# odd even characters in a string
# s = "this is my car"
# for i in s:
#     if i == "i":
#         s=s.replace(i,"new")
# print(s)
# replacement in a list
# l = [3,4,5,6,7]
# for i in range(len(l)):
#     if l[i] == 3:
#         l[i] = 67
# print(l)
# detecting the index number of a element
# l = [5,6,7,8]
# for i in l:
#     if i == 7:
#         print(l.index(i))
# d = {"saroj":1,"saroj":2}
# print(d)
# count particular element in a list
# l = [3,4,5,6,3,4,5,3,3,33,3]
# count = 0
# for i in range(len(l)):
#     if l[i] == 3:
#         l[i] = 6789
# print(l)

#reverse a list
# l = [4,5,6,7,8,9]
# for i in range(len(l)):
#     for j in range(len(l)):
#         if l[i]>l[j]:
#             l[i],l[j]=l[j],l[i]
# print(l)
# year = int(input("enter the year: "))
# if (year%4==0 and year%400==0) or year%100 !=0:
#     print("yes year is leap year")
# else:
#     print("year is not leap year")
# find the index number in a list
# l = [5,6,7,3,2]
# def finding_index_number(l,n):
#     for i in l:
#         if i == n:
#             print(l.index(i))

# finding_index_number(l,7)
#check the number is square or not
# n = 4
# import math
# print(math.isqrt(n))
#decorators
# def decorators(function):
#     def inside_function(string):
#          function(string.upper())
#     return inside_function
# @decorators
# def apply_dec(string):
#     print(string[::-1])

# apply_dec("saroj")
# raising exception
# try:
#     a = 3
#     b = 0
#     if b == 0:
#         raise Exception("not divisible")
# except Exception as e:
#     print(e)
# finally:
#     print("code is fully execited")
# # odd and even numbers
# even = [i for i in range(10) if i%2==0]
# odd = [i for i in range(10) if i%2!=0]
# print(even)
# print(odd)
# x = lambda w : w**2
# print(x(3))
# l = [5,6,7,3,1,423,1]
# min = l[0]
# max = l[0]
# for i in range(len(l)):
#     if l[i]> max:
#         max = l[i]
#     if l[i]<min:
#         min = l[i]
# print(min,max)

# k = 10
# l  = [6,4,6,4,8,2,10,0,7,3,11,-1]
# for i in l:
#     for j in l:
#         if l[i]+l[j]==k:
#             print(l[i],l[j])
# make a dictionary of two lists
# l1 = [4,5,6,7]
# l2 = [8,9,7,6]
# d = dict(zip(l1,l2))
# print(d)
# def factorial(n):
#     if n<=1:
#         return 1
#     else: 
#         return n*factorial(n-1)
# print(factorial(5))
#printing fibbonaci series
# def febbonaci_series(n):
#     if n<=1:
#         return 1
#     else:
#         return febbonaci_series(n-1) + febbonaci_series(n-2)
    
# for i in range(10):
#     print(febbonaci_series(i))
# # genrator
# def genrator():
#     for i in range(1,10):
#         yield i

# g = genrator()
# print(g.__next__())

# import os
# l = ["sar","sa"]
# s = os.path.commonprefix(l)
# print(s)