simple coding ( variable, string, list, tuple, Dictionary, set)

1. list directory

code:

import os

print(os.listdir())

O/P:

print your current directory

2.Data type in python

code:

# Printing the variables

print(a)

print(b)

print(c)

print(d)

# Printing the type of variables

print(type(a))

print(type(b))

print(type(c))

print(type(d))

O/P:

avi

345

45.32

True

<class 'str'>

<class 'int'>

<class 'float'>

<class 'bool'>

3. Operator

code:

a = 3

b = 4

# Arithmetic Operators

print("The value of 3+4 is ", 3+4)

print("The value of 3-4 is ", 3-4)

print("The value of 3*4 is ", 3*4)

print("The value of 3/4 is ", 3/4)

# Assignment Operators

a = 34

a -= 12

a *= 12

a /= 12

print(a)

# Comparison Operators

# b = (14<=7)

# b = (14>=7)

# b = (14<7)

# b = (14>7)

# b = (14==7)

b = (14!=7)

print(b)

# Logical Operators

bool1 = True

bool2 = False

print("The value of bool1 and bool2 is", (bool1 and bool2))

print("The value of bool1 or bool2 is", (bool1 or bool2))

print("The value of not bool2 is", (not bool2))

O/P:

The value of 3+4 is  7

The value of 3-4 is  -1

The value of 3*4 is  12

The value of 3/4 is  0.75

22.0

True

The value of bool1 and bool2 is False

The value of bool1 or bool2 is True

The value of not bool2 is True

4. input fuctions

code:

a = input("Enter a number: ")

a = int(a) # Convert a to an Integer(if possible)

print(type(a))

O/P:

Enter a number: 21

<class 'int'>

5. sum of two number

code:

a = input("Input 1st Number = ")

b = input("INput 2nd Number = ")

a = int(a)

b = int(b)

print("the sum of 1st and 2nd number is =", a+b)

O/P:

Input 1st Number = 25

INput 2nd Number = 20

the sum of 1st and 2nd number is = 45

6. Remainder after dividing

code:

a = 45

b = 30

%= gives reaminder

print("the remainder when a diveded by b",a%b)

O/P:

the remainder when a diveded by b 15

7. average of two number

code:

a = input("Enter first number: ")

b = input("Enter second number: ")

a = int(a)

b = int(b)

avg = (a + b)/2

print("The average of a and b is", avg)

O/P:

Enter first number: 6

Enter second number: 12

The average of a and b is 9.0

8. Slicing

code:

name = "avinash"

b = "is very good boy."

print(name+b)

print(name[-7]) #printed the letter which is 1st place that is a

# print(name[-1]) #printe the letter last letter ie. h

# print(name[2])

# print(name[3])

print(name[-2])

print(name[0:3]) #print the letter avi

print(name[-7:-1]) #print letter aninas

print(name[-7:])    #print letter avinash

print(name[1:4]) # print letter vin

print(name[-4:-1]) # print letter nas

print(b[1::3]) #print every 3rd latter

print(b[-17]) # print first letter

print(len(b)) #print how many string are there= 17 

print(b.endswith("boy.")) #string ended with that letter if yes then true otherwise false

print(b.count('o'))      # count letter how many times appear

print(b.capitalize())     #capitalize fist letter

print(b.find("very"))   #find number of first letter of string

print(b.replace('good', "bad")) # replace good with bad

O/P:

avinashis very good boy.

a 

s     

avi   

avinas

avinash

vin

nas

se ob.

i

17

True

3

Is very good boy.

3

is very bad boy.

9. String Fuctions

code:

story = "once upon a time there was a youtuber  who uploaded python course with notes Avi"

# String Functions

print(len(story))

print(story.endswith("avi"))

print(story.count("a"))

print(story.capitalize())

print(story.find("upon"))

print(story.replace("Avi", "Code With avi"))

O/P:

93

True

7

Once upon a time there was a youtuber named harry who uploaded python course with notes avi

5

once upon a time there was a youtuber named Code With Harry who uploaded python course with notes Code With Avi

10. Escape Sequence

code:

b = "avinash is very \nvery \tcleaver boy"   #\n new line print /t leave space between word

print(b)

O/P:

avinash is very 

very    cleaver boy

11. 

code:

a = input("input your name ")

print("Good afternoon Mr.",a)

O/P:

Good afternoon Mr. avi

12.Letter

code:

letter = '''Dear <|Name|>,

Greeting from ABC coding institute. You are selected for Executive

congratulation!

Have a great day ahead!

Thanks and regards

<|Date|>

'''

name = input("input your name\n")

date = input("enter date\n")

letter = letter.replace('<|Name|>',name)

letter = letter.replace('<|Date|>',date)

print(letter)

O/P:

Dear aviator,

Greeting from ABC coding institute. You are 

selected for Executive

congratulation!

Have a great day ahead!

Thanks and regards

12-12-2021

13.Finding double space

code:

st = "This is a string with double  spaces"

doubleSpaces = st.find("  ")

print(doubleSpaces)

O/P: 28

14. replace 2 space with single space

code:

st = "This is a string with double  spaces  ok"

st = st.replace("  ", " ")

print(st)

O/P: This is a string with double spaces ok

15. List

code:

# Create a list using []

a = [1, 2 , 4, 56, 6]

# Print the list using print() function

print(a)

# Access using index using a[0], a[1], a[2]

print(a[2])

# Change the value of list using

a[0] = 98

print(a)

# We can create a list with items of different types

c = [45, "avi", False, 6.9]

print(c)

O/P:

[1, 2, 4, 56, 6]

4

[98, 2, 4, 56, 6]

[45, 'avi', False, 6.9]

16. slicing of List

cocd:

friends = ["Avi", "Tom", "Rohan", "Sam", "Divya", 45]

print(friends[0:4])

print(friends[-4:])

O/P:

['Avi', 'Tom', 'Rohan', 'Sam']

['Rohan', 'Sam', 'Divya', 45]

17. List Methods

code:

l1= [1, 8, 7, 2, 21,] 

print(l1)

l1.sort() #sort the list

l1.reverse() #reverse the list

l1.append(45) #adds 45 at the end of the list

l1.insert(2,544) #inserts 544 at the index 2

l1.pop(1)     #remove element at index 2

l1.remove(21) #remove element 21

print(l1)

O/P:

[1, 8, 7, 2, 21]

[1, 2, 7, 8, 21]

[21, 8, 7, 2, 1]

[21, 8, 7, 2, 1, 45]

[21, 8, 544, 7, 2, 1, 45]

[21, 544, 7, 2, 1, 45]

[544, 7, 2, 1, 45]

18. Tuple

code:

# Creating a tuple using ()

t = (1, 2, 4, 5)

# t1 = () # Empty tuple

# t1 = (1) # Wrong way to declare a Tuple with Single element

t1 = (1,) # Tuple with Single element

print(t1)

#Printing the elements of a tuple

print(t[0])

#Cannot update the values of a tuple

#t[0] = 34 # throws an error

O/P:

(1,)

1

19.  tuple method

code:

# Creating a tuple using ()

t = (1, 2, 4, 5, 4, 1, 2,1 ,1)

print(t.count(1))

print(t.index(5))

O/P:

4

3

20. store List

code:

f1 = input("Enter fruit number 1 ")

f2 = input("Enter fruit number 2 ")

f3 = input("Enter fruit number 3 ")

f4 = input("Enter fruit number 4 ")

f5 = input("Enter fruit number 5 ")

f6 = input("Enter fruit number 6 ")

f7 = input("Enter fruit number 7 ")

myFruitList = [f1, f2, f3, f4, f5, f6, f7]

print(myFruitList)

O/P:

Enter fruit number 1 Mango

Enter fruit number 2 Banana

Enter fruit number 3 Orenge

Enter fruit number 4 Apple

Enter fruit number 5 Grapes

Enter fruit number 6 ShrgarCane

Enter fruit number 7 Cucumber

['Mango', 'Banana', 'Orenge', 'Apple', 'Grapes', 'ShrgarCane', 'Cucumber']

21. tuple test cannot chage

code:

a = (2,4,5,3,2)

a[0] = 45

O/P:

TypeError: 'tuple' object does not support item assignment

22. sum of List

code:

a = [2, 4, 56, 7]

print(a[0] + a[1] + a[2] + a[3])

print(sum(a))

O/P:     69

            69

23. count  number in tuple

code:

a = (7, 0, 8, 0, 0, 9)

print(a.count(0))

O/P:  3

24. fav Languge Dict

code:

mydict = {

    "Fast": "In a Quick Manner",

    "Avi": "A coder",

    "Marks": [1, 2, 3, 4],

    "anotherdict": {'AVo': 'Player'}

}

print(mydict['Fast'])

print(mydict['Avi'])

print(mydict['Marks'])

print(mydict['anotherdict']['AVo'])

mydict["Marks"]= [2, 0, 2, 3]

print(mydict["Marks"])

O/P:

In a Quick Manner

A coder

[1, 2, 3, 4]

Player

[2, 0, 2, 3]

25. Dict method

code:

mydict = {

    "Fast": "In a Quick Manner",

    "Avi": "A coder",

    "Marks": [1, 2, 3, 4],

    "anotherdict": {'AVo': 'Player'},

    1:2

}

print(list(mydict.keys()))   #prints the keys of the dictionary

print(mydict.values())     #prints values of the dictionay

print(mydict.items())     #prints (keys,values)

print(mydict)

updateDict = {

    "lovish": "friend",

    "divya": "pooja"

}

mydict.update(updateDict)  #pudates the dictionary by adding key-value pairs

print(mydict)

print(mydict.get('Avi2'))  #Returns None as avi2 is not present in the dictionary

print(mydict['Avi2'])    #throws an error as avi2 is not present in the dictionary

O/P:

['Fast', 'Avi', 'Marks', 'anotherdict', 1]

dict_values(['In a Quick Manner', 'A coder', [1, 2, 3, 4], {'AVo': 'Player'}, 2])

dict_items([('Fast', 'In a Quick Manner'), ('Avi', 'A coder'), ('Marks', [1, 2, 3, 4]), ('anotherdict', {'AVo': 'Player'}), (1, 2)])

{'Fast': 'In a Quick Manner', 'Avi': 'A coder', 'Marks': [1, 2, 3, 4], 'anotherdict': {'AVo': 'Player'}, 1: 2}

{'Fast': 'In a Quick Manner', 'Avi': 'A coder', 'Marks': [1, 2, 3, 4], 'anotherdict': {'AVo': 'Player'}, 1: 2, 'lovish': 'friend', 'divya': 'pooja'} 

26.  Set 

code:

a= {1, 3, 5, 6, 1}

print(type(a))

print(a) #set dont have repeat item

O/P:

<class 'set'>

{1, 3, 5, 6}

27. Empty Set

code:

# Important: This syntax will create an empty dictionary and not an empty set

a = {}

print(type(a))

# An empty set can be created using the below syntax:

b = set()

print(type(b))

O/P:

<class 'dict'>

<class 'set'>

28. Set method

code:

b= set()

print(type(b))

#adding values to an empty set

b.add(4)

b.add(5)

b.add(7)

b.add(4) #adding value repeatedly does not change a set

print(b)

b.add((9,8,3,1))

# b.add({4:5}) #cannot add list or dictionary

print(b)

print(len(b)) #prints lenth of this set

b.remove(5)

print(b)

O/P:

<class 'set'>

{4, 5, 7}

{(9, 8, 3, 1), 4, 5, 7}

4

{(9, 8, 3, 1), 4, 7}

29.  finding value of  key in Dict

code:

myDict = {

    "Pankha": "Fan",

    "Dabba": "Box",

    "Vastu": "Item"

}

print("Options are ", myDict.keys())

a = input("Enter the Hindi Word\n")

# print("The meaning of your word is:", myDict[a])

# Below line will not throw an error if the key is not present in the dictionary

print("The meaning of your word is:", myDict.get(a))

O/P:

Enter the Hindi Word

Dabba

The meaning of your word is: Box

30. empty  dict and empty set

code:

a = {}      #this syntax create empty dictionary

print(type(a))

#empty set can be create by following way

b = set()

print(type(b))

b.add(4)

b.add(5)

print(b)

O/P:

<class 'dict'>

<class 'set'>

{4, 5}

31. fav lang Dict

code:

favLang = {}

a = input("Enter your favorite language Shubham\n")

b = input("Enter your favorite language Ankit\n")

c = input("Enter your favorite language Sonali\n")

d = input("Enter your favorite language Harshita\n")

favLang['shubham'] = a

favLang['ankit'] = b

favLang['sonali'] = c

favLang['harshita'] = d

favLang['shubham'] = a

print(favLang)

O/P:

Enter your favorite language Shubham English

Enter your favorite language Ankit Marathi

Enter your favorite language Sonali Hindi

Enter your favorite language Harshita German

{'shubham': 'English', 'ankit': 'Marathi', 'sonali': 'Hindi', 'harshita': 'German'}

32. 

code:O/P:

1.

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