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Kernel: Python 3 (ipykernel)

Python For Data Science

Python is one of the most popular languages used by Data Scientists. Python has in-built mathematical libraries and functions, making it easier to calculate mathematical functions.

Data Containers in Python

Strings 2. Lists 3. Tuples 4. Dictionary

Variable in Python

In [15]:

"as"

type("This is my Class")

Out[15]:

str

In [22]:

#Varible Declaratipon
# Enter Emp_ID and Name and Age2024 in Python Interface

a ="ashi"
a_1="Rai"
a1=9
_a=0
ash="ashi"

In [ ]:

Operations on Numbers

In [28]:

(12+8*2)//3

9**9

Out[28]:

387420489

In [30]:

x=2

#2x2+4x-9

2*(x**2)+4*x-9

Out[30]:

7

In [ ]:

#Quick Practice

Declare a varible x =7 and solve following equation using Python: 

## What is the output for (4x3+3x2+5x+5)?

Print Function

In [35]:

x=3
y=6
print("sum",x+y)
print("Diff",x-y)
print("Div", x/y)

Out[35]:

sum 9
Diff -3
Div 0.5

In [40]:

print(2+3,4+5,3*4,sep="\t")

Out[40]:

5	9	12

In [ ]:

x=6
print("Total number of partcipants =",x)

Type Conversion: Convert variable into another type e.g int to float

In [41]:

float(2)

Out[41]:

2.0

In [45]:

int(9.8)
int("98a")

Out[45]:

---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
Cell In[45], line 2
      1 int(9.8)
----> 2 int("98a")
ValueError: invalid literal for int() with base 10: '98a'

Input

In [50]:

Name = input("Enter your Name: ") ##Strings
Age = int(input("Enter Age:")) ## Integers
Height = float(input("Enter Height:")) ## Floats

Out[50]:

Enter your Name: a
Enter Age:12
Enter Height:23.4

## Link : https://jupyter.org/try-jupyter/lab/

Quick Pratice:

Create python Script to input following details about your products:

Number of Products (30)
Name of Products Category (3*10)
Cost per Unit
Total Cost Price

solun
a=int(input("no of product "))
b=input("Name of Products Category ")
c=float(input("Cost per Unit "))

Total_CP=a*c

print("Total Cost Price = ",Total_CP )

Strings

In [51]:

x="a"
Y="ABCD"
C="Data Science"
len(Y)
len(C)

Out[51]:

12

In [53]:

Y[0],Y[-1],Y[1]

C[3:8]

Out[53]:

'a Sci'

In [57]:

#Y[4]="E"
#del Y[0]
del Y
#Y

Out[57]:

---------------------------------------------------------------------------
NameError                                 Traceback (most recent call last)
Cell In[57], line 3
      1 #Y[4]="E"
      2 #del Y[0]
----> 3 del Y
      4 Y
NameError: name 'Y' is not defined

In [60]:

x="caderg"
a="82154"
y="12abc"

print(min(a),max(a))
print(min(y),max(y))

Out[60]:

1 8
1 c

In [62]:

C="Ms Suyashi Raiwani"
d=C.split("i")
d

Out[62]:

['Ms Suyash', ' Ra', 'wan', '']

In [64]:

print(C+C)#3- Concadination

print(4*C) #- Repeat

Out[64]:

Ms Suyashi RaiwaniMs Suyashi Raiwani
Ms Suyashi RaiwaniMs Suyashi RaiwaniMs Suyashi RaiwaniMs Suyashi Raiwani

Quick Practice:

Write a python script to open a railway ticket booking portal and enter following details from users :

1-Name
2-last Name
3-Age
4-Gender
5-Boarding Point
6-destination

In [ ]:

## Solution

String Functions and Methods

In [65]:

x="abc123"
x.isspace()

Out[65]:

False

In [68]:

print(x.isalnum())
print(x.isalpha())

print(x.isupper())

Out[68]:

True
False
False

In [ ]:

x.isspace()

In [ ]:

x.isalpha()

if (con):
   

    if(con):
        if(con):
            ----
        else(*)
    else
    
elseif 

else:

If else condition

In [ ]:

a=0
b="ab"

if a>80:
    print("I am happy")
    if b=="ab"
       print("correct username")
    else:
        print("Inavlid username")
    
if a==0:
    print("I am Neutral")
    
else:
    print("Not Happy")

In [ ]:

b=input("Your name please")
## %s-string, %d - int, %f-float
a=int(input("Enter your Age:"))
if a>=18:
    print("Welcome and sign in to this portal")
    name=input("Create UserName:")
    if len(name)>=5:
        pwd=input("Create Password:")
    else:
        print("User Name does not met the criteria")
else:
    print("%s your age i.e %d is not valid to use this portal"%(b,a))

Quick Parctice:

Write a python script to open a railway ticket booking portal and enter following details from users :
Ask for Sign in with UserName, Password (Greater than 5), Age > 16
Login for booking UserName and Pwd

1-Name 2-last Name 3-Age 4-Gender 5-Boarding Point 6-destination

Quick Pratice:

Create python Script to input following details about your products:
Number of Products (30)
Name of Products Category (3*10)
Cost per Unit
Total Cost Price

In [ ]:



# Input details for 30 products
num_products = 30

# Define details for each product
product_details = {
    f"Product_{i+1}": {
        "Name": input(f"Enter name for Product {i+1}: "),
        "Category": input(f"Enter category for Product {i+1}: "),
        "Cost per Unit": float(input(f"Enter cost per unit for Product {i+1}: ")),
        "Total Cost Price": lambda cost_per_unit, quantity=1: cost_per_unit * quantity
    }
    for i in range(num_products)
}

# Display entered product details
for key, details in product_details.items():
    cost_per_unit = details["Cost per Unit"]
    details["Total Cost Price"] = details["Total Cost Price"](cost_per_unit)  # Calculate total cost
    print(f"\nDetails for {key}:")
    print(f"Name: {details['Name']}")
    print(f"Category: {details['Category']}")
    print(f"Cost per Unit: {cost_per_unit}")
    print(f"Total Cost Price: {details['Total Cost Price']}")

In [ ]:

## If else:

Name= input("Enter UserName")
Age=int(input("Age Please"))

if len(Name) >=5:
    print("Valid UserName\t:")
    if Age>15:
        print("You can Proceed with booking")
    else:
        print("Your Booking Not allowed")
else:
    print("Please check userName Criteria")

In [ ]:

x=range(1,10)
x

In [ ]:

x=list(range(1,10,3) )#start,stop-1,interval
x

Quick Practice:

Please create a user name of length 6 if user name is valid then create a password of length 7, if pwd is valid then print("Welcome to homepage")
Write a program that performs addition, subtraction, multiplication, or division based on user input. Prompt the user to enter two numbers and an operation (+, -, *, /). Perform the calculation and print the result.

In [ ]:

## Please create a user name of length 6, create a password of lenghth 7 

user=input("Create user name for minimum 6 lenghth:")

if len(user) >= 6:
    print("Valid user name")
else:
    print("Ops! User name not created invalid format")

Bitwise operator

Work on binary representations of numbers.
Are useful for low-level programming, flags, or optimization tasks

Bitwise Operators in Python

Operator	Name	Description	Example (x=5, y=3)	Result
`&`	Bitwise AND	Performs AND operation on each bit. If both bits are 1, the result is 1, otherwise 0.	`x & y`	`1`
`	`	Bitwise OR	Performs OR operation on each bit. If either bit is 1, the result is 1.	`x
`^`	Bitwise XOR	Performs XOR operation on each bit. If the bits are different, the result is 1.	`x ^ y`	`6`
`~`	Bitwise NOT	Inverts all the bits of the number (1 becomes 0 and 0 becomes 1).	`~x`	`-6`
`<<`	Left Shift	Shifts bits to the left by the specified number of positions.	`x << 2`	`20`
`>>`	Right Shift	Shifts bits to the right by the specified number of positions.	`x >> 2`	`1`

Notes:

Bitwise AND (&): Only 1 if both bits are 1.
Bitwise OR (|): At least one bit must be 1.
Bitwise XOR (^): True when bits differ.
Bitwise NOT (~): Flips all bits; equivalent to -(x+1).
Left Shift (<<): Shifts bits left, filling with zeros on the right.
Right Shift (>>): Shifts bits right, discarding bits on the right.

In [2]:

# Bitwise Operators in Python
x = 5  # Binary: 0101
y = 3  # Binary: 0011

# Bitwise AND
and_result = x & y  # 0101 & 0011 = 0001
print(f"x & y = {and_result}")

# Bitwise OR
or_result = x | y  # 0101 | 0011 = 0111
print(f"x | y = {or_result}")

# Bitwise XOR
xor_result = x ^ y  # 0101 ^ 0011 = 0110
print(f"x ^ y = {xor_result}")

# Bitwise NOT
not_result = ~x  # ~0101 = -(0101 + 1) = -6
print(f"~x = {not_result}")

# Left Shift
left_shift_result = x << 2  # 0101 << 2 = 10100 (equivalent to multiplying by 2^2)
print(f"x << 2 = {left_shift_result}")

# Right Shift
right_shift_result = x >> 2  # 0101 >> 2 = 0001 (equivalent to dividing by 2^2)
print(f"x >> 2 = {right_shift_result}")

Out[2]:

x & y = 1
x | y = 7
x ^ y = 6
~x = -6
x << 2 = 20
x >> 2 = 1

In [1]:

x = 5
x &= 4
print("After x &= 4:", x)  # Bitwise AND

x |= 10
print("After x |= 10:", x)  # Bitwise OR

x ^= 6
print("After x ^= 6:", x)  # Bitwise XOR

x >>= 8
print("After x >>= 8:", x)  # Right Shift

x <<= 8
print("After x <<= 8:", x)  # Left Shift

print(x := 3)  # Walrus operator

Out[1]:

After x &= 4: 4
After x |= 10: 14
After x ^= 6: 8
After x >>= 8: 0
After x <<= 8: 0
3

In [ ]:

## Loops
for i in range(0,3):
    user=input("Enter your name:")

In [ ]:

for i in "ash":
     user=input("Enter your name:\t")

Ques 2:

Input create a password with following critera:

Min len 3 and 10
Should contain one number
Should contain upper case member
Should not have a space
Shoukd have one special charactor sp=["@","?","*","$","&","^",#.!]

In [ ]:

## Atleast one number 
d=0
s=0
u=0
sp=["@","?","*","$"]

user=input("Create user name for minimum 6 lenghth:")

for i in user:
    if i.isdigit():
        d=d+1
    if i.isspace():
        s=s+1
    if i.isupper():
        u=u+1
    else:
        pass
if d>0 and s==0:
    pass
else:
    print("Opps !! you have not added a digit to username or included a space")
if u>0:
    print("Valid User name")
else:
    print("Opps !! you have not added a uppercase ")

In [ ]:

s="poor"
#3s[4]=s
#del s[1]
del s

s= "this is first session for data Science"

#s.split(" ")
s.index("f")

List

In [ ]:

a=[]

a=[1,1,2]
b=[1,2.1,"a"]
c=[[1,12],
   ["b",1]]

In [ ]:

type(b)

In [ ]:

c[0] [0]

In [ ]:

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

In [ ]:

x.append("d")

In [ ]:

In [ ]:

x.insert(2,3)

In [ ]:

In [ ]:

len(x)
del x[2]

In [ ]:

x
max(x)

In [ ]:

## Tuples 
b=(1,2,3)
len(b)
#b.append(4)
del b[2]
## tuples also does not support item addition or deletion.

Dictionary

Mapping data types
Key value pairs
key are index to members for dictionary
Keys are unique with one value for one key
Duplicate Key creation is not possible

In [ ]:

d={}
d={"A":"red","B":"Blue"}

In [ ]:

d.keys()

In [ ]:

d.values()

In [ ]:

d["C"] ="green"

In [ ]:

d["D"] = "Yellow"
d

In [ ]:

In [ ]:

 d['C']

In [ ]:

d['A']

In [ ]:

d={1:"a",2:"b"}
d

In [ ]:

d[1]="a"
d

Loops

for i in range(1,6): range(6,2,-1) range(1,6):

In [ ]:

a=list(range(10,2,-2))
a

In [ ]:

## User Input List
x=[]
n=int(input("Enter number of members" ))
for i in range (0,n):
    m=int(input("Add list member\t:"))
    x.append(m)
print(x)

In [ ]:

d["f"]=("2","3")
d

In [ ]:

#### user input Diction
d={}
n=int(input("Enter number of members"))
for i in range (0,n):
    a=input("Enter Key Name:\t")
    d[a]=b
    b=input("Enter VALUE Name:\t")
print(d)

Quick Practice 3 :

Create a list with all float values
Create a dictionary with Emp ID as Key and Names as Values

#Create a dict emp ID as key and names as values
emp_data={}
n=int(input("Enter number of employees"))
for i in range (0,n):
    Emp_id=input("Enter Emp ID")
    Name = input("Enter Name")
    d[Emp_id]=Name
print(d)

In [ ]:

## Create a dic named Emp_details with Emp ID as Keys and job roels as values.
"A101, B101"

Loops

In [ ]:

for i in range (0,5):
    input("Enter Emp name\t: ")

Python For Data Science

Data Containers in Python

Variable in Python

Operations on Numbers

Print Function

Type Conversion: Convert variable into another type e.g int to float

Input

Quick Pratice:

Strings

Quick Practice:

String Functions and Methods

If else condition

Quick Pratice:

Quick Practice:

Bitwise operator

Bitwise Operators in Python

Notes:

Ques 2:

List

Dictionary

Loops

Quick Practice 3 :

Loops

Product

Resources

Company