VAT19.txt

011235

dict={1:'a',2:'b',3:'c'}
dict1={k*2:v for(k,v) in dict.items()}
o/p= {2: 'a', 4: 'b', 6: 'c'}

numbers=range(10)
d1={n:n**2 for n in numbers if n%2==0}
d1
{0: 0, 2: 4, 4: 16, 6: 36, 8: 64}

farenhite={t1:-30,t2:-20,t3:-10,t4:0}
celsius={k:(float(5)/9)*(v-32) for(k,v) in farenhite.items()}
celsius
{'t1': -34.44444444444444, 't2': -28.88888888888889, 't3': -23.333333333333336, 't4': -17.77777777777778}



create a dictionary from the following where the values will be 
greater than 2 and divisible by both 2 and 3

d1={'a':1,'b':2,'c':3,'d':4,'e':5,'f':6,'g':7,'h':9,'i':12}
d2={k:v for(k,v) in d1.items() if v>2 if v%2==0 if v%3==0}
d2
{'f': 6, 'i': 12}


clear()  remove all items
copy()   return shallow copy
fromkeys() create dictionary from given sequence
get()   return value of the key
items()   return key value pair
keys()  return keys
values()   return values
popitem()   returns and removes element
setdefault()   inserts key with the value if key is not present
update()   updates
any()    checks if any element is true


convert list into dictionary

keys1=[]
values1=[]
count=5
for i in range(0,count):
	e=input()
	keys1.append(e)
for i in range(0,count):
	e=input()
	values1.append(e)
d1=dict(zip(keys1,values1))
print(d1)

#####

keys1=[]
values1=[]
c=int(input('Enter length of the dictionary\n'))
for i in range(0,c):
    e=input('Enter key element\n')
    keys1.append(e)
    f=input('Enter value element\n')
    values1.append(f)
d1=dict(zip(keys1,values1))
print(d1)

	LIST MANIPULATION
name='IT'
print('Hello,%s!'%name)
Hello,IT!

 name='john'
age=23
print('%s is %d years old'%(nmae,age))
john is 23 years old

mylist=[1,2,3]
>>> print('a list:%s'%mylist[0])
a list:1

st='Hello world'
>>> print("single quates are ''")
single quates are ''
>>> len(st)
11
>>> st.index('w')
6
>>> st.count('i')
0
>>> st[3:7]
'lo w'
>>> st[2:7:2]
'low'
>>> st[::-1]
'dlrow olleH'
>>> st.upper()
'HELLO WORLD'
>>> st.lower()
'hello world'
>>> st.startswith('H')
True
>>> st.endswith('s')
False
>>> st.endswith('ld')
True




count=0
while(count<5):
    print(count)
    count+=1
else:
    print('count value reaches%d'%count)
o/p
0
1
2
3
4
count value reaches5



row=['']*3
row
['', '', '']


row=['']*3
table=[row]*3
for row in table:
    print(row)
o/p
['', '', '']
['', '', '']
['', '', '']



row=['']*3
table=[row]*3
table[2][2]='X'
for row in table:
    print(row)
o/p
['', '', 'X']
['', '', 'X']
['', '', 'X']


def fun(a,b):
    print('function',a,b)
fun(2,3)
o/p
function 2 3


def fun(a,b,c=5):
    print('function',a,b,c)
fun(2,3)
o/p
function 2 3 5

def add(a,b):
    print('addition of %d and %d is %d.'%(a,b,a+b))
add(2,3)
o/p
addition of 2 and 3 is 5.


###write a function to calculate factorial of a number.the number will be 
given through argument from user

def fact(a):
    f=1
    for i in range(1,a+1):
        f=f*i
    print(f)
fact(5)


###write a function to multiply all the numbers in a list




###write a fuction to convert all vowels to uppercase

srt=input()
y=str
vowels='aeiou'
for vowel in vowels:
	y=y.replace(vowel, vowel.upper())
print(y)


##***##   	ARBITRARY FUNCTION
def arbitrary(x,y,*more):
	print('x=', x, ', y=', y)
	print('arbitrary: ', more)
arbitrary(3,4)
o/p
x= 3 , y= 4
arbitrary:  ()


def arbitrary(x,y,*more):
	print('x=', x, ', y=', y)
	print('arbitrary: ', more)
arbitrary(3,4,'hello bdfliuhbds')
o/p
x= 3 , y= 4
arbitrary:  ('hello bdfliuhbds',)


import time
>>> import datetime
>>> print('year',datetime.date.today().strftime('%Y'))
year 2019
>>> print('month',datetime.date.today().strftime('%B'))
month August
>>> print('day of year',datetime.date.today().strftime('%j'))
day of year 231
>>> print('day of month',datetime.date.today().strftime('%d'))
day of month 19
>>> print('day of week',datetime.date.today().strftime('%A'))
day of week Monday


import time
>>> import datetime
>>> dateobj=datetime.date.today().strftime('%m %d %Y %I:%M %p')
>>> print(dateobj)
08 19 2019 12:00 AM

import datetime
print(datetime.datetime.now().time())
o/p
15:45:24.470506



###Take input from user and give output of a float type addition 
in a single statement

print('The sum is %.lf'%(float(input('Enter first number:'))+float(input('Enter second number'))))

####Switch case, program make a simple calculator that can add, subtract, 
multiply, and divide using function

def add():
    print('The sum is %.lf'%(float(input('Enter first number:'))+float(input('Enter second number'))))
def sub():
    print('The difference is %.lf'%(float(input('Enter first number:'))-float(input('Enter second number'))))
def multi():
    print('The product is %.lf'%(float(input('Enter first number:'))*float(input('Enter second number'))))
def div():
    print('The quotient is %.lf'%(float(input('Enter first number:'))/float(input('Enter second number'))))
while True:
    n=input('Enter\n1 for addition\n2 for subtraction\n3 for multiplication\n4 for division\nAny key for othe options\n')
    if n=='1':
        add()
    elif n=='2':
        sub()
    elif n=='3':
        multi()
    elif n=='4':
        div()  
    else:
        c=0
        c=input('Enter e to exit\nAny key to continue\n')
        if c=='E':
            break
        else:
            continue