Ternary operator

Ternary operator

a=int(input())

b=int(input())

min=a if a < b else b

print(min)

Operators

 

#Arthematic operator:

x=int(input())

y=int(input())

print(x+y)    #arthematic

print(x-y)    #subtraction

print(x*y)    #multiple

print(x/y)    #divison

print(x%y)    #module

Relational opearor:

x=int(input())

y=int(input())

print(x>y)

print(x>=y)

print(x<=y)

print(x==y)

print(x!=y)

Logical operator:

x=int(input())

y=int(input())

print(x and y)

print(x or y)

print(not y)

#Bitwise Operator:

x=int(input())

y=int(input())

print(x&y)

print(x|y)

print(x^y)

print(x<<y)

print(x>>y)

#Assignment operator

x=int(input())

y=int(input())

print(x+=y)    #x=x+y

print(x-=y)     #x=x-y

print(x*=y)     #x=x*y 

print(x/=y)    #x=x/y    

print(x%=y)    #x=x%y 

#Identity opertor:

x=int(input())

y=int(input())

print(x is y)

print(x is not y)

#Membership operator

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

x=int(input())

print(x in y)

print(x not in y)

sep parameter

 Sep parameter:

print("Ajay","Babu","Varikallu",sep="#")

End parameter

Prints Without NewLine:

    

    print("Ajay Babu",end=" ") 

    print("Varikallu")

Inputs From User

 One Input From User:

a=input()

print(a)

Using split():

x,y,z =input().split()

print(x,y,z)

Using map function:

x=list(map(int,input().split()))

print(*x)

Another method :

x=[int(x) for x in input().split() ]

print(*x)

Combinations using methods

 Combinations using methods:

    from itertools import combinations

    n=int(input())

    c=combinations([1,2,3,4],n)

    for i in list(c):

        print(i)

# with an element-to-itself combination 

    from itertools import combinations_with_replacement

    n=int(input())

    c=combinations_with_replacement([1,2,3],n)

    for i in list(c):

        print(i)

Permutations using methods:

 #Permutations using methods:

* all permutations 

    from itertools import permutations

    p=permutations([1,2,3,4])

    for i in list(p):

        print(i)

*permutations by using length.

    from itertools import permutations

    n=int(input())

    p=permutations([1,2,3,4],n)

    for i in list(p):

        print(i)

alternate letter by 1

 #alternate letterby 1

def delo(arr):

    for a in arr:

        n=1

        k=a[0]

        for i in range(0,len(a),+2):

            if(k!=a[i]):

                n=0

                break

    return n

s=input()

print(delo(s))

find index in alphanumeric

 #digit index:

s=input()

l=len(s)

for i in range(l):

    if(s[i].isnumeric()):

        print(i,end="")

#Another method:

def index(a):

    res=""

    for i in range(len(a)):

        if(a[i]>'0' and a[i]<'9'):

            res=res+str(i)

    return res

s=input()

r=index(s)

print(r)

Email problem

 

#FIND EMAIL:

s=input()

if '@' in s:

    s=s.split('@')

    print(s[1])

else:

    print("Invalid Input")

NUMBER OF EVEN NUMBERS IN ALPHANUMERIC

 #NUMBER OF EVEN NUMBERS IN ALPHANUMERIC:

s=input()

c=0

for i in range(len(s)):

    if(s[i]=="0" or s[i]=="2" or s[i]=="4" or s[i]=="6" or s[i]=="8"):

        c+=1

print(c)

#ANOTHER method

s=input()

c=0

for i in s:

    if(i.isnumeric()):

        if(int(i)%2==0):

            c+=1

print(c)

hacker earth problems

 

Read And Print STDIN And STDOUT:

n=int(input())

s=input()

print(n*2)

print(s)

basics of python

 

BASICS OF PYTHON:

Eg1: To print Helloworld:

print("Hello World")

Eg2: To print the sum of 2 numbers

a=10 

  b=20 

print("The Sum:",(a+b))

3.printing all keywords at once using "kwlist()"

import keyword

print("The list of keywords is : ")

print(keyword.kwlist)

4.Input From User

val = input("Enter your value: ")

print(val)

5.Input multiple values at a time.

a=list(map(int,input().split()))

print(a)

6.comments in python

single line: print("Hello, World!") #This is a comment

multi line:  """

This is a comment

written in

than just one line

"""

print("Hello, World!")

7.variables

x = 5

y = "John"

print(x)

print(y)

8.casting:

x = str(3)    # x will be '3'

y = int(3)    # y will be 3

z = float(3)  # z will be 3.0

9.Type of variable:

x = 5

y = "John"

print(type(x))

print(type(y))

10.IF_ELSE:

a = 33

b = 33

if b > a:

  print("b is greater than a")

elif a == b:

print("a and b are equal")

11.FOR LOOP:

fruits = ["apple", "banana", "cherry"]

for x in fruits:

  print(x)

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

for i in range(len(a)):

print(i)

12:WHILE LOOP:

i = 1

while i < 6:

  print(i)

  i += 1

13: Break Statement

-> the break statement we can stop the loop even if the while condition is true

i = 1

while i < 6:

  if (i == 3):

    break

  print(i) #prints 1 and 2.

  i += 1

14: Continue Statement

->the continue statement we can stop the current iteration, and continue with the next:

i = 0

while i < 6:

  i += 1

  if i == 3:

    continue

  print(i) #skip the value 3.

15. Functions

  ->No parameters in function:

def my_function():

  print("Hello from a function")

my_function()

  ->passing parameters in function:

def my_function(food):

  for x in food:

    print(x) #prints apple,banana and cheery.

fruits = ["apple", "banana", "cherry"]

my_function(fruits)

16.Lambda function

->Single variable

x = lambda a : a + 10

print(x(5)) #prints 15

->Multiple variables:

x = lambda a, b, c : a + b + c

print(x(5, 6, 2)) #prints 13.

Lists in python

 

LISTS:

->Lists are used to store multiple items in a single variable.

        append()         Adds an element at the end of the list

clear() Removes all the elements from the list

copy() Returns a copy of the list

count() Returns the number of elements with the specified value

extend()     Add the elements of a list (or any iterable), to the end of the current list

index() Returns the index of the first element with the specified value

insert()         Adds an element at the specified position

pop() Removes the element at the specified position

remove()         Removes the item with the specified value

reverse()         Reverses the order of the list

sort() Sorts the list

Opertions:

1.Create a list.

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

2.print a list

print(a) #print all elements

print(a[2]) #print only 3

print(a[2:4]) #print 3 and 4

print(a[2:]) #print 3,4,5.

print(a[:3]) #print 1,2,3

print(a[-4:-1]) #print 2,3,4

print(a[0:5:2]) #print 1,3,5[slice by 2]

print(a[-1]) #print 5

3.reverse of a list

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

print(a[::-1]) #[5,4,3,2,1]

thislist = ["banana", "Orange", "Kiwi", "cherry"]

thislist.reverse()

print(thislist) #print ['cherry', 'Kiwi', 'Orange', 'banana']

4.Length of a list

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

print(len(a)) #prints 5.

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

c=0

for i in a:

    c+=1

print(c) # prints 5

5.Check item in list or not

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

if 3 in a:

print("yes")

6.Change list items

list = ["apple", "banana", "cherry"]

list[1] = "orange"

print(list)     #prints apple orange cherry

list = ["apple", "banana", "cherry"]

list[1:3] = ["watermelon"]

print(list)       #prints apple watermelon

7.Insert elements:

thislist = ["apple", "banana", "cherry"]

thislist[1:3] = ["watermelon"] # prints apple banana watermelon and cherry

print(thislist)

8.Append:

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

l.append(20)

print(l) #prints [1,2,3,4,5,20]  [append element at last]

9.extend:

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

l1=[10,20,30]

l.exends(l1)

print(l) #print [1,2,3,4,5,10,20,30]

10.Remove element

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

l.remove(2)

print(l) #print [1,3,4,5]

11.Pop

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

l.pop()

print(l) #print [1,2,3,4]

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

l.pop(3) #3 is index not elemnet

print(l) #print [1,2,3,5]

12.Clear

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

l.clear()

print(l) #prints []

13.loops in list

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

for i in l:

print(i,end=" ") #print 1 2 3 4 5 

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

[print(i,end=" ") for i in l] #print 1 2 3 4 5

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

i=0

while(i<len(l)):

print(l[i])

i+=1 #print 1 2 3 4 5

14.List comprehension

fruits = ["apple", "banana", "cherry", "kiwi", "mango"]

newlist = []

for x in fruits:

  if "a" in x:

    newlist.append(x)

print(newlist) #print ['apple', 'banana', 'mango']

15.sort list

t= [100, 50, 65, 82, 23]

t.sort()

print(t) #print [23, 50, 65, 82, 100]

t= [100, 50, 65, 82, 23]

t.sort(reverse = True)

print(t) #print [100, 82, 65, 50, 23]

16.Copy list

thislist = ["apple", "banana", "cherry"]

mylist = thislist.copy()

print(mylist) #print ["apple", "banana", "cherry"]

thislist = ["apple", "banana", "cherry"]

mylist = list(thislist)

print(mylist) #print ["apple", "banana", "cherry"]

17.List join

list1 = ["a", "b", "c"]

list2 = [1, 2, 3]

list3 = list1 + list2

print(list3)

Strings in python

 

Python String Methods:

 

Method	Description
capitalize()	Converts the first character to upper case
casefold()	Converts string into lower case
center()	Returns a centered string
count()	Returns the number of times a specified value occurs in a string
encode()	Returns an encoded version of the string
endswith()	Returns true if the string ends with the specified value
expandtabs()	Sets the tab size of the string
find()	Searches the string for a specified value and returns the position of where it was found
format()	Formats specified values in a string
format_map()	Formats specified values in a string
index()	Searches the string for a specified value and returns the position of where it was found
isalnum()	Returns True if all characters in the string are alphanumeric
isalpha()	Returns True if all characters in the string are in the alphabet
isascii()	Returns True if all characters in the string are ascii characters
isdecimal()	Returns True if all characters in the string are decimals
isdigit()	Returns True if all characters in the string are digits
isidentifier()	Returns True if the string is an identifier
islower()	Returns True if all characters in the string are lower case
isnumeric()	Returns True if all characters in the string are numeric
isprintable()	Returns True if all characters in the string are printable
isspace()	Returns True if all characters in the string are whitespaces
istitle()	Returns True if the string follows the rules of a title
isupper()	Returns True if all characters in the string are upper case
join()	Converts the elements of an iterable into a string
ljust()	Returns a left justified version of the string
lower()	Converts a string into lower case
lstrip()	Returns a left trim version of the string
maketrans()	Returns a translation table to be used in translations
partition()	Returns a tuple where the string is parted into three parts
replace()	Returns a string where a specified value is replaced with a specified value
rfind()	Searches the string for a specified value and returns the last position of where it was found
rindex()	Searches the string for a specified value and returns the last position of where it was found
rjust()	Returns a right justified version of the string
rpartition()	Returns a tuple where the string is parted into three parts
rsplit()	Splits the string at the specified separator, and returns a list
rstrip()	Returns a right trim version of the string
split()	Splits the string at the specified separator, and returns a list
splitlines()	Splits the string at line breaks and returns a list
startswith()	Returns true if the string starts with the specified value
strip()	Returns a trimmed version of the string
swapcase()	Swaps cases, lower case becomes upper case and vice versa
title()	Converts the first character of each word to upper case
translate()	Returns a translated string
upper()	Converts a string into upper case
zfill()	Fills the string with a specified number of 0 values at the beginning