Archive

Posts Tagged ‘Learning’

1Hour1Sketch challenge

September 26, 2020 Leave a comment

While searching the Twitter I found a challenge called “1hour1sketch” posting a theme or a photo and asking however want to participate and doing/sketching around the idea, so I thought I can try it and get a subject to draw. Here is my sketch for this week..

I am using galaxy Note9 and Samsung Now app.


Follow me on Twitter..

By: Ali Radwani

Daily Digital Sketch

September 24, 2020 Leave a comment

Here is the daily-sketch for today. I am using Galaxy Note 9 and Samsung Note Application for drawing and Coloring..

more on my Twitter here H.ta3kees


Follow me on Twitter..

By: Ali Radwani

Python: Shares Speculation System – Part 7

August 18, 2020 Leave a comment


Learning : Python, DataBase, SQL, SQlite3
Subject: Plan, Design and Build a Shares Speculation System

Project Card:
Project Name: Shares Speculation System
By: Ali
Date: 2.7.2020
Version: V01-2.7.2020

In this Part we will write the Function to Delete a Transaction from the System, and will write the last part of show_all_Transaction function.
First we will write a Function to Delete a Transaction, we have two types of Transactions “Buying” and “Selling” so the user will select the Transaction Type to delete.
1. Buying Transaction: If the user select to Delete a Buying Transaction, we will call show_all function to display all the Buying Transactions and the ask the user to Enter the ID of the record to be Deleted. Here is the Code ..

Then we will print-out the Selected Transaction Details and ask the user to Confirm the Deleting action by Entering ‘Y’.
After Confirming we need to perform or to Aplay three parts of code:
1. Deleting the Buying Transaction from Buying Table (buy_t_table).
2. Deleting the Buying Record from the Budget Table.
3. Updating the Share Basket Table (s_basket).
For the “Update the Share Basket Table (s_basket).” we need to Subtract the amount of the shares from the Share Basket.
Here is the code for all three action..



The Same actions will be taken if the user select to Delete a Selling
transaction. So if the user select “2. Selling Transaction:” we will call show_all function to display all the Selling Transactions and the ask the user to Enter the ID of the record to be Deleted and will display the Transaction Details. Here is the Code ..



And will waite for the user to Confirm the Deleting action, then again three blocks of code will Delete and update records in our system, here are the code ..

Now we finish the def del_trans(): Function to Delete a Buying or Selling Transaction and will work on the last part of def show_all_trans (inside = ‘No’, show=’3′): to Show/Display both Buying and Selling Transactions in one table format. To do so First we will RUN two SQL commands to ‘fetchall’ Buying and Selling Transaction… Here is the code ..


# Get All Sell Transactions Order by id desc
c.execute (" select * from sell_t_table where st_id > 0 order by st_id desc") 
show_s_trans = c.fetchall()   
            
# Get All buy Transactions Order by id desc
c.execute (" select * from buy_t_table where bt_id > 0 order by bt_id desc") 
show_b_trans = c.fetchall()    

Then we print-out the Table header as the following line:
print(“\n”,” “*11,”{:<9}{:<13}{:<30}{:<16}{:<11}{:<15}{}".format('ID','Date','Share Name','SAmount','Price','Cost','Income'))
Then using a For loop we will print-out the transactions in same format of the table header .. Here is the full Code

Last thing we will print the Totals of Investment, Incomes and the Net Profit.


print(" "*73,'Total Investment is: {:,}'.format(total_inv)) 
print(" "*76,'Total Incomes is: {:,}'.format(total_inc))  
print(" "*75,"-"*30,"\n"," "*75,'   Net Profit is: {:,} '.format(total_inc - total_inv))




We Done with this Part ..

Coming Up: In the Next post we will write the Function to Edit a Transaction.

[NOTES]
1. Part-1 has no code file.
2. We are applying some basic Validations on some part of the code, and assuming that the user will not enter a messy data.
3. This Application Purpose for Saving Transactions and NOT for Desetion Making and Dose’t Have any type of AI or ML Model to Predict the Prices and/or Giving Sugestions on Buying or Selling Shares.


:: Shares Speculation System ::

Part 1 Part 2 Part 3 Part 4 Part 5
Part 6 Part 7 Part 8



All the code are available ..

To Download my Python code (.py) files Click-Here

 


Follow me on Twitter..

By: Ali Radwani

 

Sketch from One Year Back

August 5, 2020 Leave a comment

This is an Elephant sketch from One #year ago i use a pencile then black ink pen.

Follow me on Twitter..

To The Freedom

August 3, 2020 Leave a comment

Another sketche I woke on with watercolor.

Follow me on Twitter

Python: Shares Speculation System – Part 2

July 12, 2020 5 comments


Learning : Python, DataBase, SQL, SQlite3
Subject: Plan, Design and Build a Shares Speculation System

Project Card:
Project Name: Shares Speculation System
By: Ali
Date: 2.7.2020
Version: V01-2.7.2020

In this part we will set the database connection, create the Tables and Insert the Zero records. So first let’s do the Import and the database connection..

# Database connection

import sqlite3, os 

# Create the data-base and name it as Share_S_System. 
db_conn = sqlite3.connect ("Share_S_System.db") 

# Set the connection. 
c = db_conn.cursor() 


Now we will write the function to creates the Tables, we have five tables and this could be change during the project.

# Code to create the Tables

def create_tables_() :
    # to create tables. 
    sql_share_t =    "CREATE TABLE if not exists shares_name  (s_id INTEGER PRIMARY KEY AUTOINCREMENT, full_name text, abb_name text )" 
        
    sql_buy_t_t =   "CREATE TABLE if not exists buy_t_table (bt_id INTEGER PRIMARY KEY AUTOINCREMENT ,buy_date text, sn_id integer, buy_amount integer, buy_price float, cost float)" 
    
    sql_sell_t_t  = "CREATE TABLE if not exists sell_t_table (st_id INTEGER PRIMARY KEY AUTOINCREMENT, sell_date text, sn_id integer, sell_amount integer, sell_price float, profit float)" 
 
    sql_budget_t  = "CREATE TABLE if not exists budget_t (bud_id INTEGER PRIMARY KEY AUTOINCREMENT, bud_date text, bud_amount float, bud_note text )"  

    sql_year_roi =  "CREATE TABLE if not exists year_roi (y_id INTEGER PRIMARY KEY AUTOINCREMENT, bud_amount float, profits float, costs float, roi float, t_buy float, t_sell float )"

    c.execute(sql_share_t) 
    db_conn.commit() 
    c.execute(sql_buy_t_t) 
    db_conn.commit() 
    c.execute(sql_sell_t_t)
    db_conn.commit()        
    c.execute(sql_budget_t) 
    db_conn.commit() 
    c.execute(sql_year_roi) 
    db_conn.commit()  

    input('\n .. Shares Speculation System Tables created.. Press any key .. ') 


Next we will Insert a ‘Zero’ records in the Tables, this weill set the ID’s field in each table to ‘0’ so with next records the AUTOINCREMENT will work as it should. here is the code ..


Last function in this part will be the Main-Menu of the system. The system will have five Menus each one will have it’s own page and functions to manage it, we will write all the needed functions. Here is the Main-Menu.


Coming Up: In Next part we will write the menu and the functions for the Budget Managment.

[NOTES]
1. Part-1 has no code file.


:: Shares Speculation System ::

Part 1 Part 2 Part 3 Part 4



To Download my Python code (.py) files Click-Here




Follow me on Twitter..




By: Ali Radwani




Python: Shares Speculation System – P1

July 7, 2020 6 comments


Learning : Python, SQL, SQlite,
Subject: Plan, Design and Build a Shares Speculation System (SSS)

Project Card:

Project Name: Shares Speculation System

First Draft on: 26.6.2020

Version: V01-26.6.2020

By: Ali

Brief: In this Project we will work on a Shares Speculation System (SSS) were the user can save transactions regarding his investments in the stock market.

The Project Idea: A person who works on Shares Speculation looking for a System to keep the records for his transactions and calculate the Profits and Return Of Investment ROI ratio based on Daily, Monthly or Yearly tansactions.

Scope of Work: We will use Python to writing the codes and will store the transactions in a DataBase using SQlite3.

System Tabels:
1. Shares_table (shares_name): To contain Shares Full Name and it’s Abbreviation.
2. Buy_Transactions_table (buy_t_table): To hold all buying transactions [Date, Share Name, Amount, Price, cost]
3. Sell_transaction_table (sell_t_table): To hold all selling transactions [Date, Share Name, Amount, Price, profit]
4. Budget_table (budget_t): To hold the budgets of the Shares Speculation [ Date, amount, notes
[Notes: With Budgets we can do two type of Transactions, Adding New budget will increases the Money to be Invested, also the user can withdrawal some amount of the money.]
5. Year_ROI (y_roi): After each year (end of the current year) there will be a function to be RUN and it will calculate the Total Investments, Budgets, Profits, Costs, ROI, Total Buy Transactions, Total Sell Transactions … maybe other all in one table and will store all this as a one line/record in the table.

System Functions:
For each table, we will have three main functions Add, Edit and Delete. Also we will write a Menu to access each Function and some Math/Economics formulas to calculate the Investments, Profits and ROI.

How the System Works:
The idea is, FIRST the user will create a Budget Profile, (Date, Budget Amount). Then each time the user buy or sell shares, the system will add a record saving the Transactions type and detail. If the Transaction is Buying then We will Debit the Transaction Total from the budget we have in the system
and if the transaction type is Selling we will Add the Income to the Budget.


:: Shares Speculation System ::

Part 1 Part 2 Part 3 Part 4



To Download my Python code (.py) files Click-Here




Follow me on Twitter..




By: Ali Radwani




Python: Library Managment System -P4

June 21, 2020 2 comments


Learning : Python, DataBase, SQlite
Subject: Create Simple Library Managment System

In this Part we will work on Functions to Manage the Authors of the Books. We can enter the Authors in two ways, Even with Entering the book; such as when we are entering a New Book we can Select an Author from the list or (if the Author is not exist) we can select to Enter New Author. Or from the Author menu we can Enter New Author.

Here we are working on the Author Managment, and we will write the codes to:
Add New Authors.
Edit an Author.
Delete an Author.
Show Authors.

Here is the Author Menu with Functions Names..


We will start with Add New Author: In this Function we will ask the user to enter the Author Name then if the Author has Email or any Social Media Account, then the informations will be saved. Here is the code ..

# Authors Menu

def new_authors() :
    while True  :
        os.system('clear')
        print('\n   ====== Add New Authors ======') 
    
        author_name = input('\n   Enter the Author Name .. >  ').capitalize()
        author_email = input('   Enter the Author Email [Enter to be Empty].. >  ')

        c.execute ("select * from authors where a_name='{}'".format(author_name)) 
        result = c.fetchone()     
                 
        if (result != None) : 
             print('\n   We already have [{}] in the Auther Database. '.format(class_name)) 
        else:    
                c.execute ("INSERT INTO authors (a_name, a_email) VALUES(:a_name,:a_email)",{"a_name":author_name,"a_email":author_email})
                db_conn.commit() 
                print('\n      One Author Added ... ') 
                
                while True :
                    if input('\n   Do you want to Add any Social Media Account to this Author? [Y,N] .. >  ') in ['Y','y']: 
                        c.execute ("select max(a_id) from authors") 
                        auth_id = c.fetchone() 
                        sma_name = input('\n   Enter the Social Media Name.. > ').capitalize()
                        sma_link = input('   Enter the Social Media Link.. > ')
                        c.execute ("INSERT INTO sma (sma_name,sma_link,a_id) VALUES(:sma_name,:sma_link,:a_id)",{"sma_name":sma_name,"sma_link":sma_link,"a_id":auth_id[0]}) 
                        db_conn.commit() 
                    else:
                        break 

        if input('\n\n   Do you want to Add Another Author? [Y,N].. >  ') in ['N','n'] :
             input('\n   To Exit ... Press any key ..') 
             return


Now the Next function, Edit an Author information, here we will list down all the Authors Names and ID and the user will Enter the ID of the one to be Edited, then we will display each attribute and ask the user to Edited or just press Enter (leave it Empty) to keep the exist one. Also we will give the user the ability to Enter a new Social Media Account for the user if needed.

# Edit Author Function


def edit_authors() :
   
    os.system('clear')
    print('\n   ====== Edit Authors ======') 
    print('   The List of Authors We Have, Sorted in Alphbatic\n') 
    c.execute ("select * from authors where a_id > 0  order by a_name")     
    auth_list = c.fetchall() 
    
    # First we show all Authors so the user can select the One to be Edited.
    for auth in range (0,(len(auth_list)-1),4):
       try: 
           print('{:<3}{:<20}'.format(auth_list[auth][0],auth_list[auth][1]),end="")
           print('{:<3}{:<20}'.format(auth_list[auth+1][0],auth_list[auth+1][1]),end="")
           print('{:<3}{:<20}'.format(auth_list[auth+2][0],auth_list[auth+2][1]),end="")
           print('{:<3}{:<20}'.format(auth_list[auth+3][0],auth_list[auth+3][1]))
           
       except:
           pass # Just to avoid Index out of range.    


    edit_auth = input('\n\n   Enter the ID of the Author to Edit. [Q to Exit]  >  ')
    if edit_auth not in ['q','Q'] :
        try:
            c.execute ("select * from authors where a_id = {} ".format(int(edit_auth)))     
            auth_edi = c.fetchall()  
            # Get the Author Social Media Accounts SMA. 
            c.execute ("select * from sma where a_id = {}".format(int(edit_auth)))  
            sma_list = c.fetchall()
            print('         ID:',auth_edi[0][0])
            print('       Name:',auth_edi[0][1])
            print('      Email:',auth_edi[0][2])
            print('     Social Media:')
            for each in sma_list :  
                print('{:<11}{:  ').capitalize()
            a_email = input('   Enter the Author Email.  >  ') 
            if a_name > "" :
                c.execute("update authors set a_name = '{}' where a_id = {}".format(a_name,int(edit_auth))) 
                db_conn.commit() 
            if a_email > "" :      
                c.execute("update authors set a_email = '{}' where a_id = {}".format(a_email,int(edit_auth))) 
                db_conn.commit()      
            
            if (sma_list) != "" :
                for each in sma_list :  
                    sma_l = input('   Enter the {} Account. [D to Delete the Account]  >  '.format(each[2])) 
                    if sma_l > "" and (sma_l not in ['d','D'] ):
                        c.execute("update sma set sma_link = '{}' where a_id = {} and sma_name = '{}'".format(sma_l,int(edit_auth),each[2])) 
                        db_conn.commit() 
                    # If the user select D to Delete the SMA account. 
                    elif sma_l > "" and (sma_l in ['d','D']) :
                        c.execute ("delete from sma where sma_id = '{}' ".format(each[0]))
                        db_conn.commit()
                        print('   {} Account Deleted... '.format(each[2]))

            while True :
                    # If the user want to Add more SMA to the Author.
                    if input('\n   Do you want to Add any Social Media Account to this Author? [Y,N] .. >  ') in ['Y','y']: 
                        sma_name = input('\n   Enter the Social Media Name.. >  ').capitalize()
                        sma_link = input('   Enter the Social Media Link.. >  ')
                        c.execute ("INSERT INTO sma (sma_name,sma_link,a_id) VALUES(:sma_name,:sma_link,:a_id)",{"sma_name":sma_name,"sma_link":sma_link,"a_id":int(edit_auth)}) 
                        db_conn.commit() 
                    else:
                        break
                  
        except:
            
           print('\n   Not valid .. ')
    input('\n   To Exit ... Press any key ..')
    return



When running the code, we need to go back and forth to Show_Author function to see the effect of the Adding, Editing or Deleting functions that we are working one. Now, we will write the Delete_author Function, and as the Edit one first we will list all the Authors on the screen with there ID’s and ask the user to Enter the ID for the one to be Deleted. .. Here is the code.

# Delete an Author


def delete_authors():
    os.system('clear')
    print('\n   ====== Delete Authors ======') 
    print('   The List of Authors We Have, Sorted in Alphbatic\n') 
    c.execute ("select * from authors where a_id > 0  order by a_name")     
    auth_list = c.fetchall() 
    
    # First we show all Authors so the user can select the One to be Deleted.
    for auth in range (0,(len(auth_list)-1),4):
       try: 
           print('{:<3}{:<20}'.format(auth_list[auth][0],auth_list[auth][1]),end="")
           print('{:<3}{:<20}'.format(auth_list[auth+1][0],auth_list[auth+1][1]),end="")
           print('{:<3}{:<20}'.format(auth_list[auth+2][0],auth_list[auth+2][1]),end="")
           print('{:<3}{:  '))
    if del_auth not in ['q','Q'] :
        try:
            c.execute ("select * from authors where a_id = {} ".format(int(del_auth)))     
            auth_det = c.fetchall() 

            print('         ID:',auth_det[0][0])
            print('       Name:',auth_det[0][1])
            print('      Email:',auth_det[0][2])

            if input('\n     Are you Sure you want to Delete this Author? [Y,N].  >   ') in ['Y','y'] :
        
                c.execute ("delete from authors where a_id = '{}' ".format(int(del_auth)))
                db_conn.commit()  
                # To delete any SMA linked to this Author.
                c.execute ("delete from sma where a_id = '{}' ".format(int(del_auth)))
                db_conn.commit()
                input('\n   One Author has been Deleted... Press any Key > ')    
             
            else:
                print('\n   You Select NOT To Delete Author "{}" . '.format(auth_det[0][1]))
                input('\n   To Exit ... Press any key ..') 
        except:
            input('\n   Not valid .. ')
    return



Last Function in this part is Show Authors information, this is easy and short code, we will list down on the screen all the Authors Name, Email, SMA sorted by the Authors Name. Here is the code..

# Function to Show All Authors

def show_authors() :
    os.system('clear')
    print('\n   ====== Show Authors ======')
    print('   The List of Authors We Have, Sorted in Alphbatic\n') 
    c.execute ("select * from authors where a_id > 0  order by a_name")     
    auth_list = c.fetchall()           
    for auth in range (0,(len(auth_list))):
       try: 
           # For each Author we fetch the Social Media Accounts. 
           c.execute ("select * from sma where a_id = {}".format(auth_list[auth][0]))  
           sma_list = c.fetchall()
           print('\n     ID: {}'.format(auth_list[auth][0])) 
           print('   Name: {}'.format(auth_list[auth][1]))
           print('  Email: {}'.format(auth_list[auth][2]))
           print('  Social Media:')
           # Here we print-out the SMA for the Author.
           for each in sma_list :  
              print('{:<11}{:<13} [ {} ]'.format('',each[2],each[3]))
           print('-'*50)           
       except:
           pass     
    
    input('\n\n         ... Press any Key ..')           



Next We will work on Book Managment Menu to Add, Edit, Delete and Show Books in our Library.

[ NOTE ]
1. I am using Galaxy Tab and QPython3 App.
2. All the above codes are available in the Download Section/Page under the project name.
3. The application codes, Functions, Menus and other parts of the Application are subject of changes. In case of changes I will mention that.


:: Library Managment System ::

Part 1 Part 2 Part 3 Part 4

To Download my Python code (.py) files Click-Here




Follow me on Twitter..




By: Ali Radwani




Python: Library Managment System -P3

June 18, 2020 4 comments


Learning : Python, DataBase, SQlite
Subject: Create Simple Library Managment System

In this Part we will work on Classification Managment. As we know each book can fall in one or more subject or say ‘Classification’ then we can search for a book by it’s class, example of this, we may have classifications like: cook, computer, Health, History; also a book can have more than one classifications such as one book we gave it cook and sweet .. and so-on.

To do this we add another table to the project to hold all the Classifications and manage them. Here is the code ..

# New Table to be added.

sql_class  = "CREATE TABLE if not exists classifi_list (class_id INTEGER PRIMARY KEY AUTOINCREMENT, class_name text )"  
c.execute(sql_class)
db_conn.commit()
        
c.execute ("INSERT INTO classifi_list (class_id) VALUES(:class_id)",{"class_id":0})
db_conn.commit()

[NOTE: This code been added to the source file.]

Classification Managment: In Classification Managment we will have four Functions, and will write the codes to perform each function, also we will write the Menu Function to let the user select a function. Functions are:

1. Add New Classification.
2. Edit a Classification information.
3. Delete a Classification.
4. Show Classifications.

First: Here is the class_menu() Function, the user will have the prompt and asked to select an action or (9) to Exit.

# Classification Managment Fumction    
def class_menu(): 

    while True : 
        os.system('clear')
        print('\n   ====== LMS - Classification Managment ======')
        print('    1. Add New Classification.')
        print('    2. Edit a Classification information.')
        print('    3. Delete a Classification.') 
        print('    4. Show Classifications')
        print('    9. Exit.')
            
        user_choice = input('\n   Select the Action you want from the Menu: ')
        
        if  user_choice == '1' :
            # Function to Add New Classification   
            new_classification()

        elif user_choice == '2' : 
            # Function to Edit a Classification information.
            edit_classification()
  
        elif user_choice == '3' : 
            # Function to Delete a Classification.
            delete_classification()  

        elif user_choice == '4' : 
            # Function to Show a Classification.
            show_classification()  

        elif user_choice == '9' : 
            return 



Now, let’s start with Add New Classification. Simply we will ask the user to write a classification to be added to the Database, then we will check if it is already available in our Database, If yes then we will till the user so, or (if not available) we will add it, and will give the user the chance to add another one. If the user enter (Q or q) then we exit (Quit) from the function and return to the previous Menu.

# Function to Add New Classification

def new_classification() :
    os.system('clear')
    print('\n   ====== Add New Classification ======')  
    while True  :
        class_name = input('\n   Enter the Classification and Press Enter. [ To Exit Enter Q ].. >  ').capitalize()
        
        c.execute ("select * from classifi_list where class_name='{}'".format(class_name)) 
        result = c.fetchone()     
        if class_name not in ['q','Q']:  
            if (result != None) : 
                print('\n   We already have [{}] in the Classification Database. '.format(class_name)) 
            else:    
                c.execute ("INSERT INTO classifi_list (class_name) VALUES(:class_name)",{"class_name":class_name})
                db_conn.commit() 
                print('\n      One Classification Added ... ')
        else:
            input('\n   To Exit ... Press any key ..') 
            return
The Code
Code, Run-Time


Another Function to work on is Edit a Classification information In this one we will print-out all the Classifications we have and the user will select the one to Edit and will asked to Enter the ID number next to it. Then to Enter the New One and we will save it. Here is the code and the Out-put screen shot. To display all classifications on the screen we will use this code..

# Code to display the classifications on the screen

# First we list down all classifications.
    c.execute ("select * from classifi_list where class_id > 0  order by class_name")     
    class_list = c.fetchall()           
    for cla in range (0,(len(class_list)-1),4):
       try: 
           print('{:<3}{:<20}'.format(class_list[cla][0],class_list[cla][1]),end="")
           print('{:<3}{:<20}'.format(class_list[cla+1][0],class_list[cla+1][1]),end="")
           print('{:<3}{:<20}'.format(class_list[cla+2][0],class_list[cla+2][1]),end="")
           print('{:<3}{:<20}'.format(class_list[cla+3][0],class_list[cla+3][1]))
           
       except:
           pass 

[NOTE: We use the try: except to avoid any (index out of range) errors.]

Code
Code, Run-time



Next we will work on the Delete a Classification, Deleting may effect on some Books that uses that classification, so we need to till the user to confirm Deleting. Also we will use the same code to list down all the classifications and ask the user to enter the ID of the one to-be Deleted. Here is a part of the code to Delete a classification..

# Part of the code .. 

del_class = input('\n\n   To Delete a Classification Enter it''s ID number [Q To Exit]  > ')

if del_class not in ['Q','q'] :
    c.execute ("select * from classifi_list where class_id = '{}' ".format(int(del_class))) 
    c_to_del =  c.fetchone()[1]     
    print('\n   Are you sure you want to Delete "{}" Classification? '.format(c_to_del))     
    print('   This action may effect on books has this Classification.') 
    user_approve = input('\n   If you are sure to Delete "{}" Press Y or N: > '.format(c_to_del))  
    if user_approve in ['y','Y'] : 
        c.execute ("delete from classifi_list where class_id = '{}' ".format(del_class))
        db_conn.commit() 
        input('\n   One Classification has been Deleted... Press any Key > ')    
    else: 
        input('\n\n   You Select NOT to Delete the "{}" Classification, Press any key to go back.. '.format(c_to_del))

    if input('\n   Do you Want to Delete Another Classification? [Y,N] > ') in ['n','N'] :
         return 
else:
    input('\n   You Select to Exit .. Press any Key > ')
    return   
    
The Code Code Run-Time



Last Function to work in this post is Show Classifications the function we will list down all the Classifications on the screen. Very easy one, here it is

# Show Classification Function

def show_classification():      
    os.system('clear')
    print('\n   ====== Show Classification ======')
    print('   The List of Classifications We Have, Sort in Alphbatic\n') 
    c.execute ("select * from classifi_list where class_id > 0  order by class_name")     
    class_list = c.fetchall()           
    for cla in range (0,(len(class_list)-1),4):
       try: 
           print('{:<3}{:<20}'.format(class_list[cla][0],class_list[cla][1]),end="")
           print('{:<3}{:<20}'.format(class_list[cla+1][0],class_list[cla+1][1]),end="")
           print('{:<3}{:<20}'.format(class_list[cla+2][0],class_list[cla+2][1]),end="")
           print('{:<3}{:<20}'.format(class_list[cla+3][0],class_list[cla+3][1]))
           
       except:
           # just in case error, pass and do nothing.
           pass        
    input('\n\n         ... Press any Key ..') 
Code
Code Run-time




What’s Coming In coming post, we will write the Functions to Manage the Authors.

[ NOTE ]
1. I am using Galaxy Tab and QPython3 App.
2. All the above codes are available in the Download Section/Page under the project name.
3. The application codes, Functions, Menus and other parts of the Application are subject of changes. In case of changes I will mention that.




:: Library Managment System ::

Part 1 Part 2 Part 3

To Download my Python code (.py) files Click-Here




Follow me on Twitter..




By: Ali Radwani




Python: Library Managment System -P2

June 16, 2020 5 comments


Learning : Python, DataBase, SQlite
Subject: Create Simple Library Managment System

The Data: In the Part-1 we Talk about the Entities that we will create and about the Data we will collect (Fields). So here we are writing them again and we will add classification for each book :
Books Entity: Book Name, Book Author, Date of publish, Edition Number, Book classification number.
Author Entity : Author name, Author Nationality, email, SMA (social media account).
From the Author information we can see that we need to define a new Entity to hold the SMA.
SMA Entity: SMA Name, SMA Link.
Class Entity: class Name.
Here is each entity and field :
book:

  • b_id integer PK
  • b_name text,
  • b_a_id integer,
  • b_isbn text,
  • b_dop text,
  • b_ed integer

author:

  • a_id integer PK
  • a_name text
  • a_email text

sma:

  • sma_id integer PK,
  • a_id integer,
  • sma_name text,
  • sma_link text

class:

  • class_id integer PK
  • class_name text
  • Now we will write the code to create the Database and set a connection

    # create the Database and set a connection

    import sqlite3, os

    # Create the data-base & name it as LMS.
    db_conn = sqlite3.connect ("LMS.db")

    # set the connection.
    c = db_conn.cursor()

    Now we will create the tables..

    # Function to create the tables

    def create_tables_() :
    # to create tables.
    sql_books = "CREATE TABLE if not exists books (b_id INTEGER PRIMARY KEY AUTOINCREMENT, b_name text, b_a_id integer,b_isbn text, b_dop text, b_ed integer)"

    sql_author = "CREATE TABLE if not exists author (a_id INTEGER PRIMARY KEY AUTOINCREMENT ,a_ name text, a_email text )"

    sql_class = "CREATE TABLE if not exists classifi_list (class_id INTEGER PRIMARY KEY AUTOINCREMENT, class_name text )"



    sql_b_class = "CREATE TABLE if not exists b_class (b_class_id INTEGER PRIMARY KEY AUTOINCREMENT, b_id integer, class_id integer )"

    sql_sma = "CREATE TABLE if not exists sma (sma_id INTEGER PRIMARY KEY AUTOINCREMENT, a_id integer,sma_name text, sma_link text)"


    c.execute(sql_books)
    db_conn.commit()

    c.execute(sql_author)
    db_conn.commit()

    c.execute(sql_class)
    db_conn.commit()


    c.execute(sql_b_class)
    db_conn.commit()

    c.execute(sql_sma)
    db_conn.commit()

    input('\n .. LMS Tables created.. Press any key .. ')

    After creating the tables, and to make sure that AUTOINCREMENT of Primary key will run we need to have a number in each PK field, to do that we will add a 0 (Zero) record to each table. Here is the code to do it ..

    #Function to Insert the Zero Record

    #Function to Insert the Zero Record.
    def insert_record_0():

    c.execute ("INSERT INTO books (b_id) VALUES(:b_id)",{"b_id":0})
    c.execute ("INSERT INTO authors (a_id) VALUES(:a_id)",{"a_id":0})
    c.execute ("INSERT INTO classifi_list (class_id) VALUES(:class_id)",{"class_id":0})

    c.execute ("INSERT INTO b_class (class_id) VALUES(:class_id)",{"class_id":0})
    c.execute ("INSERT INTO sma (sma_id) VALUES(:sma_id)",{"sma_id":0})

    db_conn.commit()

    input('\n ...Dummy records been Inserted .... Press any key .. ')

    The above functions create_tables_() and insert_record_0() will be run only one time to create the tables, and insert record number ZERO. During the programming and coding we may need to delete the DataBase and re-created again, in that case we run the both functions again.

    Create the Menus
    As we side, each Entities will have three Main Functions [Add, Edit, delete ad search]. Let’s start with Main Menu.

    Main Menu Code
    Main Menu Run-Time
    Book Menu, Code
    Book Menu, Run-Time
    Author Menu, Code
    Author Menu, Run-Time
    Classification Menu, Code
    Classification Menu, Run-Time
    Search Menu, Code Search Menu, Run-Time

    What’s Coming In coming post, we will write the Functions to Manage the Authors and Classifications.

    [ NOTE ]
    1. I am using Galaxy Tab and QPython3 App.
    2. All the above codes are available in the download section/page under the project name.
    3. During the progress of the project, we may need to Add, Edit or delete any Tables, Fields, Menus or Functions that we had already finished.

    :: Library Managment System ::


    Part 1 Part 2

    To Download my Python code (.py) files Click-Here


Follow me on Twitter..


By: Ali Radwani