Learning python Day 7

Day7

Functions

Two types of function: library and user defined functions

To define function we use def

def disp():
    print("Hello")

print("Started")
disp()   #function calling
print("Back")

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Started

Hello

Back

def findsum(x,y):
    print("Sum=",x+y)


a=int(input("Enter a number "))   #5
b=int(input("Enter 2nd number "))   #7
findsum(a,b)

findsum(10,20)
findsum(100,20)

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Enter a number 7

Enter 2nd number 5

Sum= 12

Sum= 30

Sum= 120

def findsum(x,y):
    return x+y

a=int(input("Enter a number "))   #5
b=int(input("Enter 2nd number "))   #7
c=findsum(a,b)
print("Sum=",c)

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Enter a number 7

Enter 2nd number 5

Sum= 12

def disp(n):
    if(n%2==0):
        print(n,"is even")
    else:
        print(n,"is odd")

a=int(input("Enter a number"))
disp(a)
disp(34)
disp(98)

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Enter a number7

7 is odd

34 is even

98 is even

def findlargest(a,b,c):
    if(a>b and a>c):
        print(a,'is largest')
    elif(b>a and b>c):
        print(b,'is largest')
    elif(c>a and c>b):
        print(c,'is largest')
    else:
        print("Can't find the largest one")


findlargest(12,54,23)

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54 is largest

def table(n):
    print("Table of",n,"is")
    for i in range(1,11):
        print(n*i)

a=int(input("Enter a number"))
table(a)
table(9)

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Enter a number7

Table of 7 is

7

14

21

28

35

42

49

56

63

70

Table of 9 is

9

18

27

36

45

54

63

72

81

90

Learning Python - Day 8

Learning Python- Day 6

DAY 6

dict1={
    "Abhi":"Noida",
    "Nitin":"Gr. Noida"
     }
print("Dict is",dict1)

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Dict is {'Abhi': 'Noida', 'Nitin': 'Gr. Noida'}

In the above program, Abhi is the key and Noida is the value. Key and value will always be together in dictionary. The key is analogous to the index, they are like addresses but they don’t have to be

integers. They are usually characters; the values are

similar to the elements in a list and contain information.

To create a dictionary, we use curly brackets. The keys are the first elements; they must

be immutable and unique. Each key is followed by a value separated

by a colon. The values can be immutable, mutable and duplicates.

Each key and value pair is separated by a comma.

To add new value to the dictionary

dict1["Rohit"]="Delhi"
dict1["Tom"]="Pune"
dict1["John"]="Agra"
dict1["Joy"]="Jaipur"

Program:

dict1={
    "Abhi":"Noida",
    "Nitin":"Gr. Noida"
     }
dict1["Rohit"]="Delhi"
dict1["Tom"]="Pune"
dict1["John"]="Agra"
dict1["Joy"]="Jaipur"
print(dict1)

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{'Abhi': 'Noida', 'Nitin': 'Gr. Noida', 'Rohit': 'Delhi', 'Tom': 'Pune', 'John': 'Agra', 'Joy': 'Jaipur'}

dict2=dict1.copy()
print("Dict2 is ",dict2)
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Dict2 is  {'Abhi': 'Noida', 'Nitin': 'Gr. Noida', 'Rohit': 'Delhi', 'Tom': 'Pune', 'John': 'Agra', 'Joy': 'Jaipur'}

print(dict2["Tom"])

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Pune

print(dict2.keys())

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dict_keys(['Abhi', 'Nitin', 'Rohit', 'Tom', 'John', 'Joy'])

print(dict2.values())

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dict_values(['Noida', 'Gr. Noida', 'Delhi', 'Pune', 'Agra', 'Jaipur'])

print(dict2.items())

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dict_items([('Abhi', 'Noida'), ('Nitin', 'Gr. Noida'), ('Rohit', 'Delhi'), ('Tom', 'Pune'), ('John', 'Agra'),

print(dict2.get("Nitin"))

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Gr. Noida

print(dict2.popitem())

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('Joy', 'Jaipur')

print(dict2.pop("Rohit"))

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Delhi

print(dict2)

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{'Abhi': 'Noida', 'Nitin': 'Gr. Noida', 'Tom': 'Pune', 'John': 'Agra'}

print("Nitin" in dict2)
print("Joy" in dict2)
print("Joy" not in dict2)

dict2.clear()
print(dict2)

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{}

del dict2
#print(dict2)

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   print(dict2)

NameError: name 'dict2' is not defined

for i in dict1.items():
    print(i)
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('Abhi', 'Noida')

('Nitin', 'Gr. Noida')

('Rohit', 'Delhi')

('Tom', 'Pune')

('John', 'Agra')

('Joy', 'Jaipur')

for i in dict1.keys():
    print(i)
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Abhi

Nitin

Rohit

Tom

John

Joy

for i in dict1.values():
    print(i)
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Noida

Gr. Noida

Delhi

Pune

Agra

Jaipur

for i,j in dict1.items():
    print(i,j)
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Abhi Noida

Nitin Gr. Noida

Rohit Delhi

Tom Pune

John Agra

Joy Jaipur

SETS

Let’s cover sets; they are also a type of collection.Sets are a type of collection. This means that like lists and tuples, you can input different python types. Unlike lists and tuples they are unordered.This means sets do not record element position. Sets only have unique elements. This means there is only one of a particular element in a set.To define a set, you use curly brackets You place the elements of a set within the curly brackets. You notice there are duplicate items. When the actual set is created, duplicate items will not be present.

You can convert a list to a set by using the function set; this is called type-casting. You simply use the list as the input to the function set. The result will be a list converted to a set.

s1={10,20,30,40,50,10}
print(s1)
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{40, 10, 50, 20, 30}

s1.add(60)

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{40, 10, 50, 20, 60, 30}

s1.update([70,80,90])

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{70, 40, 10, 80, 50, 20, 90, 30}

print(len(s1))

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8
print(max(s1))

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90
print(min(s1))

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10

s1.remove(10)
print(s1)

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{70, 40, 80, 50, 20, 90, 30}

#s1.remove(100)
s1.discard(1000)

print(s1.pop())

print(100 in s1)
print(100 not in s1)

s2={10,20,30,40,50}
s3={40,50,60,70,80}

s4=s2.union(s3)
print(s4)

s5=s2.intersection(s3)
print(s5)

s6=s2.difference(s3)
print(s6)

s7=s2.symmetric_difference(s3)
print(s7)

print(s2,s3)

#s2.intersection_update(s3)
#s2.difference_update(s3)
s2.symmetric_difference_update(s3)
print(s2)


s8={10,20,30,40}
s9={30,40}
s10={50,60,70}

print(s9.issubset(s8))
print(s8.issuperset(s9))
print(s8.isdisjoint(s10))

Learning Python- Day 7

Learning Python- Day 5

Day 5

Lists are also a popular data structure in Python.
Lists are also an ordered sequence.
Here is a list L. A list is represented with square brackets.
In many respects lists are like tuples, one key difference is they are mutable.
Lists can contain strings, floats, integers.
We can nest other lists.
We also nest tuples and other data structures; the same indexing conventions apply for nesting.

Like tuples, each element of a list can be accessed via an index.

list1=[10,20,30,40,50,60]
print("list is",list1)

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list is [10, 20, 30, 40, 50, 60]

list1=[10,20,30,40,50,60]
print("Length of list is",len(list1))

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Length of list is 6

list1=[10,20,30,40,50,60]
list1.append(70)
print(list1)

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[10, 20, 30, 40, 50, 60, 70]

To add multiple entries to the list

list1=[10,20,30,40,50,60]
list1.extend([80,90,100])
print(list1)

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[10, 20, 30, 40, 50, 60, 80, 90, 100]

list1=[10,20,30,40,50,60]
list2=list1.copy()
print(list2)

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[10, 20, 30, 40, 50, 60]

To remove last element from the list

list1=[10,20,30,40,50,60]
list2=list1.copy()
print(list2.pop())

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60

list1=[10,20,30,40,50,60]
list3=list1
print("List3 is ",list3)
print(list3.pop())
print(list3)

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List3 is  [10, 20, 30, 40, 50, 60]

60

[10, 20, 30, 40, 50]

Any change in one list will automatically make change in other list when you use = instead of copy

list1=[10,20,30,40,50,60]
list2=list1.copy()
print("List2 is",list2)
print(list2[2])

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List2 is [10, 20, 30, 40, 50, 60]

30

list1=[10,20,30,40,50,60]
list2=list1.copy()
print(list2[2:7])

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[30, 40, 50, 60]

list1=[10,20,30,40,50,60]
list2=list1.copy()
print(list2[2:7:2])

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[30, 50]

list1=[10,20,30,40,50,60]
list2=list1.copy()
print(list2[::-1])

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[60, 50, 40, 30, 20, 10]

list1=[10,20,30,40,50,60]
list2=list1.copy()
print(list2[-2])

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50

To insert a particular element at a particular index

list1=[10,20,30,40,50,60]
list2=list1.copy()
list2.insert(2,110)
print(list2)

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[10, 20, 110, 30, 40, 50, 60]

To remove particular element

list1=[10,20,30,40,50,60]
list2=list1.copy()
list2.insert(2,110)
print(list2)
list2.remove(110)
print("list2 is ",list2)

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[10, 20, 110, 30, 40, 50, 60]

list2 is  [10, 20, 30, 40, 50, 60]

Removing any element from specific index

list1=[10,20,30,40,50,60]
list2=list1.copy()
print(list2.pop(3))

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40

To find index of any element

list1=[10,20,30,40,50,60]
list2=list1.copy()
print(list2.index(50))

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4

To count no of times element is repeating

list4=[1,2,3,2,1,2,1,2,3,2,1,2,3,2]
print(list4.count(2))

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7

list4=[1,2,3,2,1,2,1,2,3,2,1,2,3,2]
list4.sort()
print(list4)

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[1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3]

list4=[1,2,3,2,1,2,1,2,3,2,1,2,3,2]
list4.reverse()
print(list4)

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[2, 3, 2, 1, 2, 3, 2, 1, 2, 1, 2, 3, 2, 1]

list5=[2,7,4,3,5]
print(max(list5))

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7

print(min(list5))
print(sum(list5))

list6=[i for i in range(10)]
print(list6)

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[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]

list7=[i for i in range(2,8)]
print(list7)

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[2, 3, 4, 5, 6, 7]

Converting string to list

str1="hello This is Python string"
list1=str1.split(" ")
print(list1)

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['hello', 'This', 'is', 'Python', 'string']

Converting list to string

str1="hello This is Python string"
list1=str1.split(" ")
print(list1)
str2=" ".join(list1)
print(str2)

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['hello', 'This', 'is', 'Python', 'string']

hello This is Python string

str1=input("Enter a string")
print("String is ",str1)
list1=str1.split(" ")
print("List1 is ",list1)
list1.reverse()

print("List1 is ",list1)
str2=" ".join(list1)
print(str2)

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Enter a stringthis is a sting of india

String is  this is a sting of india

List1 is  ['this', 'is', 'a', 'sting', 'of', 'india']

List1 is  ['india', 'of', 'sting', 'a', 'is', 'this']

india of sting a is this

Tuples

tuple1=(10,20,30,40,50)
print(len(tuple1))
print(tuple1[2])
print(tuple1[1:4])
print(tuple1[1:4:2])
print(tuple1[::-1])
print(tuple1.index(40))
print(tuple1.count(30))
print(min(tuple1))
print(max(tuple1))
print(sum(tuple1))

t1=(100,)
print(t1,type(t1))

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5

30

(20, 30, 40)

(20, 40)

(50, 40, 30, 20, 10)

3

1

10

50

150

(100,) <class 'tuple'>

Learning Python Day 6