printing triangle pattern

       

word="ayman"
a="*"
c="h"
d="i"
n=0
m=0
while n<10:
    n=n+1
    print(c,end='')
    print(d,end='')
    print(a,end='')
    for b in word:
     print(b,end='')       
    print(a)
    m=0
    print(c,end='')
    while m<=n:
        print(d,end='')
        m=m+1
        
while n>=0:
      n=n-1
      print(a,end='')
      for b in word:
          print(b,end='')
      print(a)
      m=0
      print(c,end='')
      while m<n:
           m=m+1
           print(d,end='')
      print(d,end='')  
        
    

python 3.4.2 part 13 write and read a text file

First create file "readwritefile.py"

/****************************/

       


fw=open("sample.txt","w")

fw.write("i like to swim")

fw.close()



fr=open("sample.txt","r")

textcontent=fr.read()

print(textcontent)

fr.close()

/*********************/
1.fw is variable, it just indicate file write, you can have your own variable
2.fr is variable, it just indicate file read, you can have your own variable
3.open("sample.txt","w"). it create a text file named "sample.txt"
4.and the attribute "w" , w is predefined attribute indicating writing permission
5.and the attribute "r" , w is predefined attribute indicating reading permission
6.close() is used to avoid wastage of memory

python 3.4.2 part 12 downlaoding an image

First install beautifulscraper

pip install beautifulscraper

 

create a new file downimage.py

/******************************/

       


import urllib.request

import random



def download_image(url):

    file_name=random.randrange(1,1000)

    full_file_name=str(file_name)+".jpg"

    urllib.request.urlretrieve(url,full_file_name)



download_image("https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg7r5YcS7A_m8OAUsgT7W9M7HUm0vR7BD1Sv2jNnbgaP0tlPpuogQjzQeqlsQK0BRK3YMc4pLWl6m3_JJ_DrvjdUBfLCtkvOv0YFlkLjmB4xTcxLr_cn1uSPsXPPM71e50uf9gQGU3FrvY/s1600/2.jpg")

/***************************************/

run it
1.random is used select a random number
2.first we create download_image(url) function
3.to give a name for downloaded image, we use random function
4.str(file_name) is used to convert  "file_name( number )" to string

5.urllib.request.urlretrieve is a function used to download the image

6."https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg7r5YcS7A_m8OAUsgT7W9M7HUm0vR7BD1Sv2jNnbgaP0tlPpuogQjzQeqlsQK0BRK3YMc4pLWl6m3_JJ_DrvjdUBfLCtkvOv0YFlkLjmB4xTcxLr_cn1uSPsXPPM71e50uf9gQGU3FrvY/s1600/2.jpg" this url will pass to def download_image(url):

python 3.4.2 part 11 executing a function from other fileStudent code

Create two files

1.teacher.py

2.student.py

student.py

/******************/

def john():

    print("my name is john")

teacher.py
/*****************/

import student

student.john()

python 3.4.2 part 10 Add two numbers using def function

File ->new file

copy below code


/********************************/

       


def add_numb(*args):

 total=0

 for x in args:

  total=+x

  print(total)

  

add_numb(3)

add_numb(3,5,6)

/************************************/
then save it
Run->Run module(press f5)

Python 3.4.2 part 2.1 printing hello tutorial

1. cmd

       


cd /python34

python helloworld.py

1. Notepad

       

       

print("helloworld")

1. cmd

       
       

       

python helloworld.py

python 3.4.2 part 9 installing cherrypy

for this ,first you want to follow part 7
pip install cherrypy

python 3.4.2 part 8 installing jinja2

for this ,first you want to follow part 7
pip install jinja2

python 3.4.2 part 7 installing pip tutorial

https://pip.pypa.io/en/latest/installing.html
----->

https://bootstrap.pypa.io/get-pip.py

now open downloaded get-pip.py
now it will start installing



then goto
Control Panel\System and Security\System---->advanced system setting-->
environment variable-->

now open command prompt

python 3.4.2 part 6 installing ipython-0.13.1.py2-win32-PROPER.exe

https://github.com/downloads/ipython/ipython/ipython-0.13.1.py2-win32-PROPER.exe

Python 3.4.2 Part 5 Using input tutorial

>>> x=input("Enter a string")
Enter a string ayman
>>> x
' ayman'
>>> y=input("Enter your name: ")
Enter your name: Ayman
>>> x
' ayman'
>>> y
'Ayman'
>>> x=input("Enter a string")
Enter a string5
>>> x
'5'
>>> y=int(input("Enter a number"))
Enter a number8
>>> y
8
>>> y+int(x)
13

Now why we got an error in y+x??
please comment the reason

Python 3.4.2 Part 4 Using Variables tutorial

Storing a number to x

       

x=10
        
    

       

x+20
        
    

Storing string

       

x="mams"
        
    

       

x+" "+"Python"
        
    

Now adding a number with string variable must type cast to int
eg
x=100
y="10"
to add x and y we should convert y to a number

type casting (Converting string to number)

       

x+int(y)
        
    

python 3.4.2 Part 3 maths tutorial

To Add two number simply type

       

5+8
        
    

To Subtract

       

5-9
        
    

To Divide

       

8/3
        
    

To Mutiplication

       
8*9
        
    

To get power of X^n

eg: 2^50

       

2**50
        
    

or

       

pow(2,50)
        
    

Now check these examples

1.8/3

2.8//3 (check the decimals)

3.3+4+5*9+8/4 (order is PEMDAS, if you dont know this check it google)

Python 3.4.2 part2 printing hello tutorial

Goto start menu then click python command line

or 

Goto start menu then click python GUI

now type

       

print ("hello")
        
    

press enter

out put

Python 3.4.2 part1 installation tutorial

1.Goto this https://www.python.org/downloads/ site and download python 3.4.2 or for windows click this

https://www.python.org/ftp/python/3.4.2/python-3.4.2.msi

2.Install it