Extracting text from an image using pytesseract tool and package using Python programming.

install tesseract.exe from here.

First, here is an image which contains some text as following..[saved as sample.jpg)

And here is the full code to extract text from above image.

from PIL import Image
#Python Imaging Library (abbreviated as PIL) (in newer versions known as Pillow)
# is a free and open-source additional library for the Python programming language that
#adds support for opening, manipulating, and saving many different image file formats.
import pytesseract
#Python-tesseract is an optical character recognition (OCR) tool for python
import cv2
pytesseract.pytesseract.tesseract_cmd = 'C:\\Program Files (x86)\\Tesseract-OCR\\tesseract.exe' 
img = "sample.jpg"
t1=pytesseract.image_to_string(Image.open(img))
#print(pytesseract.image_to_string(Image.open(img)))
print(t1)
file1=open('recognized.txt', 'w')
file1.writelines(t1) 
file1.close()
print("File created successfully!")

And the output from above program is..

As the program just extracted only characters from an image. And also extracted string is stored in text file by using file handling.

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in the following example we used three packages, they are

a) bs4 [Beautiful Soup for web scraping]
b) pandas [panel data for data representation ]
c) request [to get source / url]

#data science with Python - extracting Gold Price
import bs4 
import pandas as pd 
import requests 

url = 'https://www.goodreturns.in/gold-rates/bangalore.html'
result = requests.get(url) 
soup = bs4.BeautifulSoup(result.content,'html.parser') 
price = soup.find_all('div', {"id":"current-price"})
for pr in price:
    print("Price:", pr.text)
txt=pr.text

from tkinter import *
root=Tk()
root.title('Gold Price')
root.configure(bg='gold')
root.geometry('200x100')
w=Label(root, text=txt, bg='red', font='sans 14')
b=Button(root, text="Close", fg='red', bg='yellow', command=root.destroy)
w.pack()
b.pack()
root.mainloop()

Output of the above example is:

Click here for other programs on Data Science 

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1. Multi-Level Inheritance in Python

#Multilevel Inheritance in Python
class India:
    def first(self):
        print ('India is the largest democratic country in the world')

class Karnataka(India):
    def sec(self):
        print ('Karnataka is famous for IT and Coffee Production')

class Bengaluru(Karnataka):
    def third(self):
        print ('Bengaluru also known as Garden city!')
b=Bengaluru()
b.first()
b.sec()
b.third()

Output of the above program is :

India is the largest democratic country in the world
Karnataka is famous for IT and Coffee Production
Bengaluru also known as Garden city!

2. Hierarchical Inheritance in Python example

# Hierarchial Inheritance using Python
class Details:
    def __init__(self):
        self.__id=""       
        self.__name=""
        self.__gender=""
    def setData(self,id,name,gender):
        self.__id=id
        self.__name=name
        self.__gender=gender
    def showData(self):
        print("Id: ",self.__id)
        print("Name: ", self.__name)
        print("Gender: ", self.__gender)
class Employee(Details): #Inheritance
    def __init__(self):
        self.__company=""
        self.__dept=""
    def setEmployee(self,id,name,gender,comp,dept):
        self.setData(id,name,gender)
        self.__company=comp
        self.__dept=dept
    def showEmployee(self):
        self.showData()
        print("Company: ", self.__company)
        print("Department: ", self.__dept)
class Doctor(Details): #Inheritance
    def __init__(self):
        self.__hospital=""
        self.__dept=""
    def setDoctor(self,id,name,gender,hos,dept):
        self.setData(id,name,gender)
        self.__hospital=hos
        self.__dept=dept
    def showDoctor(self):
        self.showData()
        print("Hospital: ", self.__hospital)
        print("Department: ", self.__dept)

def main2():
    print("Employee Object")
    e=Employee()
    e.setEmployee(1,"SHARAN","Male","ITC","Sales Manager")
    e.showEmployee()
    print("\nDoctor Object")
    d = Doctor()
    d.setDoctor(1, "Ramesh", "Male", "AIIMS", "ENT")
    d.showDoctor()
main2()

Output of the above program is :

Employee Object
Id: 1
Name: SHARAN
Gender: Male
Company: ITC
Department: Sales Manager

Doctor Object
Id: 1
Name: Ramesh
Gender: Male
Hospital: AIIMS
Department: ENT

3. Hybrid Inheritance in Python

#Hybrid Inheritance using Python
class Emp:
    cname="MIT India"
 
class SystemAdmin(Emp):
    srole="System Admin"
     
class WebDev(Emp):
    wrole="UI Developer"
     
class DBA(WebDev, SystemAdmin,Emp):
    drole="Data Base Creating"
     
obj=DBA()
print("Company Name:"+obj.cname)
print("SysAdmin:"+obj.srole)
print("WebDev:"+obj.wrole)
print("DBA:"+obj.drole)

Output of the above program is :

Company Name:MIT India
SysAdmin:System Admin
WebDev:UI Developer
DBA:Data Base Creating

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An exception is a problem that arises during the execution of a program. An exception can occur for many different reasons, including the following:

A user has entered invalid data.
A file that needs to be opened cannot be found.
A network connection has been lost in the middle of communications etc.

Programs on Exception Handling in Python 

OUTPUT:

Enter num1:2

Enter num2:0

Divide by ZERO Error

OUTPUT:

Invalid index

OUTPUT:

The file opened successfully

OUTPUT:

Enter your age:18

Eligible for vote

OUTPUT:

Enter a:2

Enter b:0

Second number should be non-zero

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Steps:

1. Create a simple python program file as following.

How to connect MySQL database using Python?

1. Create a table in MySQL with the following record 

2. Now create python program called “db5.py” as following

#!C:/Python27/python.exe
print “Content-type: text/html\n”
# Database program to access mysql data on WAMP server
print(“<h1> Python and MySQL Connection </h1>”)
print(“<hr>”)
import pymysql
conn=pymysql.connect(host=’localhost’, user=’root’,
password=”, db=’demo’)
a=conn.cursor()
sql=’SELECT * from emp’;
a.execute(sql)
countrow=a.execute(sql)

data=a.fetchall()
print “<table border=1 cellpadding=4 cellspacing=4>”
print “<tr bgcolor=yellow><th> Name </th> <th> Basic
</th> <th> Bonus </th> <th> TA </th> <th> PF </th>
</tr>”
for row in data :
print
“<tr><td>”,row[0],”</td>”,”<td>”,row[1],”</td>”,”<td>”,
row[2],”</td>”,”<td>”,row[3],”</td>”,”<td>”,row[4],”</td
> </tr>”
print “</table>”

3. See the output as following

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According to John McCarthy, AI is an ability to interact with the world in the form of speech, vision, motion, manipulation etc.
or Ability to model the world and to reason about it.
or Ability to learn and to adapt rapidly.

Future goals of AI
To build systems that exhibit intelligent behaviour
To understand intelligence in order to model it

A Brief History of AI
In 1955, Newell and Simon created the first AI program. The person who finally coined the term artificial intelligence and is regarded as the father of AI is John McCarthy.

Applications of AI

1) Faster web searching
2) Work in deadly environments like extreme weather
3) Real-time language translate
4) Delivering a correct medical diagnosis
5) Intelligent tutoring systems in education
6) Algorithmic trading in share market
7) Quick market analysis and data mining
8) Portfolio management
9) Human resources and recruiting(HRM) – screeing resumes and performance appraisals.
10) News, publishing and writing in media
11) Online and customer service
12) Self-parking and advanced cruise controls in cars and other vehicles.
13) Optical character recognition (OCR)
14) Robotics
15) Hybrid intelligent system

What is the programming language used for artificial intelligence and machine learning?
As it purely depends on what languages you like programming in. AI programs have been written in just about every language ever created.

The most common programming languages are.

• Lisp,
• Prolog
• C/C++
• Java (recently)
• Python(more recently).

You can also read on AngularJS here

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