Archive
Python: Coffee Consumption – P4
Learning : Python, SQlite3, Dataset, Pandas,
Subject: Create Coffee Consumption Application.
[NOTE: To keep the code as simple as we can, We WILL NOT ADD any user input Varevecations. Assuming that our user will Enter the right inputs.]
[ IF THE IS FIRST TIME DOWNLOADING THE CODE FILE, SELECT OPTION 7 FROM MAIN-MENU TO CREATE THE DATABASE]
In this part (Part-4) of Coffee Consumption App, we will write all three Function to manage the Coffee types.
- Create Function: Add New Coffee Type.
- Create Function: Edit a Coffee Type.
- Create Function: Delete a Coffee Type.
Beginning with adding new Coffee Type, we will ask the user to enter a new Coffee Type, then we simply added to the databasde. … Here is the Code ..
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Tip: To Capitalize user input we are using one line code
# Capitalize user input
user_input = ” “.join([word.capitalize() for word in user_input.split(” “)])
The second Function in this part is to Edit a selected Coffee Type, so we will list-down all Types we have in the database, the user will select one (ID) then we will ask to enter the new one and update the database. Here is the code..
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Last Function in this part will be to Delete a selected Coffee Type, so again we will list all Coffee Types we have and will ask the user to select the one to be Deleted, then we execute the SQL command to Delete the record from the database… Here is the code..
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What’s Coming: In Part-5 we will do the Follwing:
Writing three Function to Manage the Coffee Size, Functions are: Add New Coffee Size, Edit Coffee Size and Delete a Coffee Size.
..:: Have Fun with Coding ::.. 🙂
::.Coffee Consumption Parts.::
| Part 1 | Part 2 | Part 3 | Part 4 | Part 5 |
| Part 6 | Part – | Part – | Part – | Part – |
To Download my Python code (.py) files Click-Here
Follow me on Twitter..By: Ali Radwani
Python: Coffee Consumption – P3
Learning : Python, SQlite3, Dataset, Pandas,
Subject: Create Coffee Consumption Application.
[NOTE: To keep the code as simple as we can, We WILL NOT ADD any user input Varevecations. Assuming that our user will Enter the right inputs.]
[ IF THE IS FIRST TIME DOWNLOADING THE CODE FILE, SELECT OPTION 7 FROM MAIN-MENU TO CREATE THE DATABASE. ]
In this part (Part-3) of Coffee Consumption App, we will fill in some code into selected Functions. We will do the following:
- Create Function: Show list.
- Create Function: is_available.
- Create Function: Manager Menu.
- Create Manager Coffee Name Functions: Add, Edit, Delete
So, let’s start with writing the Manager Menu Function and a while loop to take the user selection and trigger the corresponding Function… Here is the Code ..
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We have two functions to help us in this application, one of them called def show_list(dt,d_id) is to Display the Data we have in the Lookup Tables based on the user selection function. The Function will take two arguments:
dt: data-table (Coffee Name, Coffee Type, Coffee Size)
d_id: id column name, and returning nothing.
Fisrt, let’s look at this Function:
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The second Function will be used to check if the user selection is available in the database, we will call it def is_available (dt, d_id, check_id) this Function is to check if the passed ID available in the data-set or not. The Function will take three Arguments as:
dt: Data-Table, d_id : Name of id column, check_id : The id we want to search for, and it will Return the data-set. After return, if dataset is empty that’s mean selected id is not available.
Now let’s see the function code..
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Now we will start writing first three functions to manage the Coffee Name, and will start with Adding New Coffee Name to the lookup Table.
In coming code first we will call the header then show_list(‘coffee_name’,’cn_id’) passing Table Name:’coffee_name’ and id column:’cn_id’ to display the Coffee Names we have on the sccreen. Then we will ask the user to enter the New Name to be added to the database. Here is the Full code..
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Next we will write the Edit Function, and again after the header and show_list(‘coffee_name’,’cn_id’) we will ask the user to enter the ID of the Coffee Name to be change, here we will do a simple validation on user input. After that we will update the record that the user select. Here is the code..
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Last Function in this part is to Delete a selected Coffee Name by selection it’s ID, as in the Edit Fnction, the user will select an Id, we will check the availability the will execute the Delete command. Here is the code..
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What’s Coming: In Part-4 we will do the Follwing:
Writing three Function to Manage the Coffee Type, Functions are: Add New Coffee Type, Edit Coffee Type and Delete a Coffee Type.
..:: Have Fun with Coding ::.. 🙂
| Part 1 | Part 2 | Part 3 | Part 4 | Part 5 |
| Part 6 | Part – | Part – | Part – | Part – |
To Download my Python code (.py) files Click-Here
By: Ali Radwani
Python Project: Disarium Number
Learning : Python to solve Mathematics Problems
Subject: Disarium Number
In Mathematics there are some formulas or let say rules that generate a sequence of given a certen result, and accordingly we gave that number or that sequence a name, such as even numbers, odd numbers, prime numbers and so on.
Here in this post we will talk about the Disarium Number and will write a code to check if a given number Disarium or Not.
Defenition: A Number is a Disarium if the Sum of its digits powered with their respective position is equal to the original number. Example: If we have 25 as a Number we will say: if (2^1 + 5^2) = 25 then 25 is Disarium.
So: 2^1 = 2, 5^2 = 25, 2+25 = 27; 25 NOT Equal to 27 then 25 is NOT Disarium.
Let’s take n = 175:
1^1 = 1
7^2 = 49
5^3 = 125
(1 + 49 + 125) = 175 thats EQUAL to n so 175 is a Disarium Number.
In the bellow code, we will write a function to take a number from the user the check if it is a Disarium Number or not. In this function we will print out the calculation on the screen. Let’s start by writing the function
# is_disarium function.
def is_disarium(num) :
"""
Project Name: Disarium Number
By: Ali Radwani
Date: 2.4.2021
"""
the_sum = []
l = len(num)
for x in range (0,l):
print(num[x] , '^',x+1,'=', (int(num[x])**(x+1)))
the_sum.append((int(num[x])**(x+1)))
if int(num) == sum(the_sum) :
print ("\n The sum is {}, and the original Number is {} So {} is a Disarium Number.".format(sum(the_sum),num,num))
else:
print ('\n The sum is {}, and the original Number is {} So it is NOT Disarium.'.format(sum(the_sum),num))
num = input('\n Enter a Number to check if it is Disarium. > ')
# Call the function and pass the num.
is_disarium(num)
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To Download my Python code (.py) files Click-Here
By: Ali Radwani
Python Project: Drawing Cloud Number
Learning : Python, Drawing
Subject: Using Python to Draw Cloud Number
In this project we will write a code to draw a cloud of number, we will do this as layers each layer with different font size and different color density.
To do this we will write a function def draw_cloud(tcolor,max_r,sr,lr) : to fill the screen with max_r random numbers from sr to lr (small range, large ramge) using tcolor color. We will recall the function several time each time we will change the tcolor,max_r,sr,lr. Here is the code ..
The Code |
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Example with Gray theme |
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Another Example with Pink theme. |
By: Ali Radwani
Python: My Orders Tracker P-4
Learning : Pythn, sqlite, Database, SQL
Subject: Create a system to track the orders
In this last part we will write the code to Edit an Order, in editing an order function first we will show all orders and will ask the user to select the one to be EDIT, then we will display that order detail on the screen and ask the user to confirm the action by entering ‘Y’ [our code will handel both y and Y]. We will ask the user about each attribute in the Order details if it need to be change or [Just press Enter to Keep the Current Data], also if the user enter ‘e’ or ‘E’ we will exit from the Editing mode.
Here is the code ..
# Function to Edit an Order
def edit_order():
os.system('clear')
print("\n==========[ Edit Orders ]==========")
show_order('yes')
edit_order = input(' Select the Order ID to be Edited. [E to Exit] > ')
if edit_order in ['e','E'] :
return
elif not edit_order.isnumeric() :
input('\n You need to enter an Order''s ID [Numeric]. .. Press any Key .. ')
return
try:
c.execute ("select * from orders where o_id ={}".format(edit_order))
order_list = c.fetchone()
if order_list == [] :
input('\n ID {} Not Exsist. .. Press any key to continue. '.format(edit_order))
return
os.system('clear')
print("\n==========[ Edit Orders ]==========\n")
print('\n Details of the Order you select:\n ')
print(" "*15,"ID: ",order_list[0])
print(" "*13,"Date: ",order_list[1])
print(" "*5,"Order Number: ",order_list[2])
print(" "*12,"Price: ",order_list[4])
print(" "*9,"Quantity: ",order_list[5])
print(" "*3,"Shipment Price: ",order_list[6])
print(" "*7,"Total Cost: {:.2f}".format((order_list[4]*order_list[5]) + order_list[6]))
print(" "*6,"Description: ",order_list[3])
print(" "*12,"Image:",order_list[8])
print(" "*13,"Link:",order_list[7])
user_confirm = input("\n\n You Select to EDIT the above Order, Enter Y to confirm, E to Exit. > ")
if user_confirm in ['e','E'] :
input('\n You entered ''E'' to Exit. Nothing will be change. Press any key. ')
return
if user_confirm in ['y','Y'] :
#To Edit the order..
print("#"*57)
print("##"," "*51,"##")
print("## NOTE: Enter E any time to EXIT/Quit."," "*12,"##")
print("## OR JUST Press Enter to keep the Current data."," ##")
print("##"," "*51,"##")
print("#"*57,)
while True :
new_date = input (f'\n The current date is: {order_list[1]}, Enter the New date as[dd-mm-yyyy] > ')
if e_to_exit(new_date) =='e' : return
if new_date =="" : break # Break the while loop if the user want to keep the current Date.
if date_validation (new_date) == 'valid' :
break
else :
print(date_validation (new_date))
new_onum = input (f'\n The current Order Number is: {order_list[2]}, Enter the New Order Number. [E to Exit]. > ')
if e_to_exit(new_onum) =='e' : return
new_qunt = input (f'\n The current Quantity is: {order_list[5]}, Enter the New Quantity. [E to Exit]. > ')
if e_to_exit(new_qunt) =='e' : return
new_price = input (f'\n The current Price is: {order_list[4]}, Enter the New Price. [E to Exit]. > ')
if e_to_exit(new_price) =='e' : return
new_ship_price = input (f'\n The current shipment Price is: {order_list[6]}, Enter the New Quantity. [E to Exit]. > ')
if e_to_exit(new_ship_price) =='e' : return
new_link = input (f'\n The current link is: {order_list[7]}, Enter the New Link. [E to Exit]. > ')
if e_to_exit(new_link) =='e' : return
new_image = input (f'\n The current Image is: {order_list[8]}, Enter the New Image (path). [E to Exit]. > ')
if e_to_exit(new_image) =='e' : return
new_desc = input (f'\n The current Description is:\n {order_list[3]}.\n\n Enter the New Description. [E to Exit]. > ')
if e_to_exit(new_image) =='e' : return
# Updating the record in the DataBase.
if new_date > '' and new_date != "e" :
c.execute("update orders set order_date = '{}' where o_id = {}".format(new_date,int(order_list[0])))
db_conn.commit()
if new_onum > '' and new_onum != "e" :
c.execute("update orders set order_num = '{}' where o_id = {}".format(new_onum,int(order_list[0])))
db_conn.commit()
if new_qunt > '' and new_qunt != "e" :
c.execute("update orders set order_quantity = '{}' where o_id = {}".format(new_qunt,int(order_list[0])))
db_conn.commit()
if new_price > '' and new_price != "e" :
c.execute("update orders set order_price = '{}' where o_id = {}".format(new_price,int(order_list[0])))
db_conn.commit()
if new_ship_price > '' and new_ship_price != "e" :
c.execute("update orders set order_price = '{}' where o_id = {}".format(new_ship_price,int(order_list[0])))
db_conn.commit()
if new_link > '' and new_link != "e" :
c.execute("update orders set order_link = '{}' where o_id = {}".format(new_link,int(order_list[0])))
db_conn.commit()
if new_image > '' and new_image != "e" :
c.execute("update orders set order_img = '{}' where o_id = {}".format(new_image,int(order_list[0])))
db_conn.commit()
if new_desc > '' and new_image != "e" :
new_desc = " ".join([word.capitalize() for word in new_desc.split(" ")])
c.execute("update orders set order_desc = '{}' where o_id = {}".format(new_desc,int(order_list[0])))
db_conn.commit()
input('\n One record has been EDITED and Saved... \n ... Press any key to Continue ...')
else:
input('\n Wrong input ... Press any key to continue ..')
except:
pass
[All the System Codes available in Download Page.]
Finish: Now we have an application that will store and retrieve our simple order data.
Enhancement: We can do some enhancement in [link and image] data part to show and display them in better way.
| Part 1 | Part 2 | Part 3 | Part 4 |
To Download my Python code (.py) files Click-Here
By: Ali Radwani
Python: My Orders Tracker P-3
Learning : Pythn, sqlite, Database, SQL
Subject: Create a system to track the orders
In this part we will write the code to Delete an Order that we have from our system, also we will add some validations on the user input, like if the user enter something not from the menu, or to do so, first we will re-call the show_orders() function that we have and passing the ‘yes’ parameter which means we are calling the function from inside another function [we will not print the function header, and will not clear the screen]. Then we will ask the user to select/Enter the ID of the order to be Deleted, after that we will print tha order details again on the screen and ask the user to confirm Deleting command by entering ‘Y’ … thats it.. let’s write the code..
# Delete Order
def del_order():
os.system('clear')
print("\n==========[ Delete Orders ]==========\n")
show_order('yes')
del_order = input(' Select the Order ID to be Deleted. [E to Exit] > ')
if not del_order.isnumeric() :
input('\n You need to enter an Orders ID [Numeric]. .. Press any Key .. ')
return
elif del_order in ['e','E'] :
return
try:
c.execute ("select * from orders where o_id ={}".format(del_order))
order_list = c.fetchone()
if order_list == [] :
input('\n ID {} not exsist.'.format(del_order))
return
os.system('clear')
print("\n==========[ Delete Orders ]==========\n")
print('\n Details of the Order you select:\n ')
print(" ID: ",order_list[0])
print(" Date: ",order_list[1])
print(" Order Number: ",order_list[2])
print(" Price: ",order_list[4])
print(" Quantity: ",order_list[5])
print(" Shipment Price: ",order_list[6])
print(" Total Cost: {:.2f}".format((order_list[4]*order_list[5]) + order_list[6]))
print("\n Description:",order_list[3])
print(" Image:",order_list[8])
print(" Link:",order_list[7])
user_confirm = input("\n\n You Select to DELETE the above Order, Enter Y to confirm, E to Exit. > ")
if user_confirm in ['y','Y'] :
#To Delete the order..
c.execute ("delete from orders where o_id ={}".format(int(del_order)))
db_conn.commit()
input('\n One record has been DELETED ... \n ... Press any key to Continue ...')
elif user_confirm in ['n','N']:
input("\n You select not to DELETE any thing. Press any key to Continue .. ")
elif user_confirm in ['e','E']:
input("\n You select stop the process and EXIT. ... Press any key to Continue .. ")
return
else:
input('\n Wrong input ... Press any key to continue ..')
except:
pass
The user select #3 from the menu to Delete an Order |
The screen display the list of orders we have in the system, and the user select Order ID Number 3 to delete it. |
The screen display the details of the order ID 3 and ask the user to confirm the deleting by entering ‘Y’ |
In Next Post: In the coming post P4 , we will write the codes to Edit an order information.
| Part 1 | Part 2 | Part 3 | Part 4 |
To Download my Python code (.py) files Click-Here
By: Ali Radwani
Python: My Orders Tracker P-2
Learning : Pythn, sqlite, Database, SQL
Subject: Create a system to track the orders
In this part we will write the code to Add new Order to the system, and to Show the orders we have in the database. Also we will write tow new functions that we will use in our application, one is the Date Validation and the other is just to check if the user enter a [q or Q] during collecting data [Q mean Quit] then we will call the quit() function.
Before we start the Add new order function, we will write the def date_validation (the_d) : and we will pass the date that the user enter and will check if it is in the right format, here in our application we will check if it is in [dd-mm-yyyy] format, the function will return the ‘valid’ string if the date in in right format, otherwise it will return a message of error.
Here is the function code ..
# Date Validation function.
def date_validation (the_d) :
if the_d=="" or the_d[2] !='-' or the_d[5] !='-' :
return '\n Date Not Valid. [Date format: dd-mm-yyyy]'
else:
if not(len((the_d.split("-")[2])) == 4 ):
return '\n Date Not Valid "Bad Year". [Date format: dd-mm-yyyy].'
if not (len((the_d.split("-")[1])) == 2 and (int(the_d.split("-")[1]) > 0 and int(the_d.split("-")[1]) 0 and int(the_d.split("-")[0]) <=31)) :
return '\n Date Not Valid "Bad Day". [Date format: dd-mm-yyyy].'
return 'valid'
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The other function as we said, we will call it after each data entry to check on user input if it is ‘Q’ or Not. Here is the code..
def q_to_quit(check):
# If the user enter [q or Q] the function will return quit function.
if check in ['q','Q'] :
return quit()
Now, we will start to write the function to Add new order, we will ask the user to enter the date for the order, such as Order date, order number, the description, price and so-on. Here is the code..
# Function to add new order to the system.
def add_order():
os.system('clear')
print("\n==========[ Add New Order ]==========\n")
while True :
print(' NOTE: Enter Q any time to EXIT/Quit. \n')
order_date = input(' Enter the Date of the Order. as[dd-mm-yyyy] > ')
q_to_quit(order_date)
if date_validation (order_date) == 'valid' :
break
else :
print(date_validation (order_date))
order_Num = input(' Enter the order ID or Number. > ')
q_to_quit(order_Num)
order_desc = input(' Enter the order Description. > ')
q_to_quit(order_desc)
order_price = input(' Enter the Order Price. > ')
q_to_quit(order_price)
order_quantity = input(' Enter the quantity of the order. > ')
q_to_quit(order_quantity)
shipment_price = input(' Enter the shipment_price. > ')
q_to_quit(order_price)
order_link = input(' Enter the hyper Link to the Order. > ')
q_to_quit(order_link)
order_img = input(' Enter the Image file path. > ')
q_to_quit(order_img)
order_desc = " ".join([word.capitalize() for word in order_desc.split(" ")])
c.execute ("INSERT INTO orders (order_date, order_num, order_desc, order_price,order_quantity, shipment_price , order_link, order_img ) VALUES(:order_date, :order_Num, :order_desc, :order_price, :order_quantity, :shipment_price , :order_link, :order_img)", {"order_date":order_date, "order_Num":order_Num , "order_desc":order_desc, "order_price":order_price,"order_quantity":order_quantity, "shipment_price":shipment_price , "order_link":order_link, "order_img":order_img})
db_conn.commit()
input('\n Press any key to Contenu..')
After adding a records to the database, now we want to show what we have and print it on the screen, so we will write a function to Show the data. Here is the code..
# Function to display the data on the screen.
def show_order():
os.system('clear')
print("\n==========[ Show Orders ]==========\n")
c.execute ("select * from orders where o_id >0")
order_list = c.fetchall()
for x in range (0,len(order_list)):
print(" ID: ",order_list[x][0]," "*(10-(len(str(order_list[x][0])))), end='')
print("Date: ",order_list[x][1]," "*2, end='')
print(" Order Number: ",order_list[x][2]," "*(8 - len(order_list[x][2])))
print("Price: ",order_list[x][4]," "*(6 - len(str(order_list[x][4]))), end='')
print("Quantity: ",order_list[x][5]," "*(11 - len(str(order_list[x][5]))), end='')
print("Shipment Price: ",order_list[x][6]," "*(10 - len(str(order_list[x][6]))), end='')
print("[ Total Cost: ",(order_list[x][4]*order_list[x][5]) + order_list[x][6],"]")
print("\nDescription:",order_list[x][3])
print("Image:",order_list[x][8])
print("Link:",order_list[x][7])
print("-------------------------------------------------------------------\n")
input('\n Press any key to Contenu.. ')
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In Next Post: In the coming post P3 , we will write the codes to Delete an Order and to Edit an order.
To Download my Python code (.py) files Click-Here
By: Ali Radwani
Python: My Orders Tracker P-1
Learning : Pythn, sqlite, Database, SQL
Subject: Create a system to track the orders
Overview:
To track and manage the orders we making through the Internet, we will use the SQlite DateBase to store the data and Python to write the code.
Data we collect:
We will collect the following: order_date, order_ID, order_desc, order_price, shipment_price, order_quantity, order_link, order_img,
Functions: In this project we will create several functions related to the Order Management such as
– Add new Order.
– Edit an Order.
– Delete an Order.
– Show the orders.
Also we will use some of our older functions like date validation.
In Part 1:
– We will set-up the database, create the connection.
– We will create wote the code to create the table, and insert the zero-record.
– We will create the functions names, and the Main-Menu.
So, first code in this part is to import sqlite3, os
then, we will write the database connection as the commeing code:
# Create the data-base and name it as myorders.
db_conn = sqlite3.connect (“myorders.db”)
# set the connection.
c = db_conn.cursor()
Then, we will start writing the the code for the main menu and the functions names that we may have in the application, as in all our systems we will have the three most used function to Add, Edit and Delete the an Order, also we need to show the orders in our system/database, we also will use other function that will help us to Validate the user input such as Date-Validating.
Now, we will start to write the code, first the Main-Menu:
# The Main Menu
def main_menu():
os.system('clear')
print("\n==========[ Main Menu ]==========")
print(' 1. Add New Order.')
print(' 2. Edit an Order.')
print(' 3. Delete an Order.')
print(' 4. Show Orders.')
print(' 9. Exit.')
user_choice = input("\n Select from the Menu: > ")
# we will return the user choice.
return user_choice
Now, we will have the all functions name with header code.
# All functions names with Header
def add_order():
os.system('clear')
print("\n==========[ Add New Order ]==========")
input('\n Press any key to Contenu..')
def edit_order():
os.system('clear')
print("\n==========[ Edit an Order ]==========")
input('\n Press any key to Contenu..')
def del_order():
os.system('clear')
print("\n==========[ Delete an Order ]==========")
input('\n Press any key to Contenu..')
def show_order():
os.system('clear')
Last thing in this part, we will write the main while function in the body part that will call the Main_Menu and keep the user in the application until he/she select number 9 in the menu that mean Exit.
# running the menu and waiting for the user input.
while True :
user_select = main_menu()
if user_select == '1' :
add_order()
elif user_select == '2' :
edit_order()
elif user_select == '3' :
del_order()
elif user_select == '4' :
show_order()
elif user_select == '9' :
print('\n\n Thank you for using this Appliation. ')
break
else :
input('\n Select Only from the list.. Press any key and try again..')
In Next Post: In the coming post P2, we will write the codes for the Add new Order to the system also to Show the list of orders we have in the databse.
| Part 1 | Part 2 | Part 3 | Part 4 |
To Download my Python code (.py) files Click-Here
By: Ali Radwani
Python: Data Visualization Part-2
Learning : python, pygal, Data Visualization,Line Chart
Subject: Data visualization using pygal library
In this post we will talk about Line-chart using pygal library in python, Line-chart has three sub-type as: Basic, Stacked ,Time. We will use the data-set for Average age of Males and Females at first Marage during 6 yeaars (2000 and 2006), the code line to set the data data will be as :
line_chart.add(‘Females’,[22,25,18,35,33,18])
line_chart.add(‘Males’, [30,20,23,31,39,44])
Line-chart: Basic
This is very normal and basic chart we use in all reports, we are feeding the data for Males and Females average age in first marage.. here is the code and the output ..
import pygal
line_chart = pygal.Line()
line_chart.add('Females',[22,25,18,35,33,18])
line_chart.add('Males', [30,20,23,31,39,44])
line_chart.x_labels=map(str,range(2000,2006))
line_chart.title = "Males and Females first Marage Age (average)"
line_chart.render()
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Line-chart: Stacked Line Stacked chart (fill) will put all the data in top of each other. Here is the code.
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Line-chart: Time Line Last type just to add or format the x_lables of the chart, we can use lambda function to do this (we can use lambda function with any other chart types), here we will do two example, one is using full time/date and another just write the month-year as string and will use the lambda function to calculate second data-set of Tax’s based on the salary amount..
import pygal
from datetime import datetime, timedelta
d_chart = pygal.Line()
d_chart.add('Females',[22,25,18,35,33,18])
d_chart.add('Males', [30,20,23,31,39,44])
d_chart.x_labels = map(lambda d: d.strftime('%Y-%m-%d'), [
datetime(2000, 1, 2),
datetime(2001, 1, 12),
datetime(2002, 3, 2),
datetime(2003, 7, 25),
datetime(2004, 1, 11),
datetime(2005, 9, 5)])
d_chart.title = "Males and Females first Marage Age (average)"
d_chart.render()
 |
To give better example of using lambda function, we will say: we have a salaries for 6 years (May-2000 to May-2006) and a Tax of 0.25, we will let the lambda function to calculate the Tax amount for each salary. Here is the code ..
# Using lambda to calculate Tax amount
import pygal
d_chart = pygal.Line()
d_chart.add('Salary', [550,980,1200,1800,2200,3500])
d_chart.add('Tax',map(lambda t: t*0.25, [550,980,1200,1800,2200,3500]))
d_chart.x_labels = map(str,(
'May-2001','May-2002',
'May-2003','May-2004',
'May-2005','May-2006'))
d_chart.title = "Salary and Tax (0.25) payment in 6 years"
d_chart.render()
 |
Next we will talk about Histogram chart.
:: Data Visualization using pygal ::
| Part-1Bar-Chart | Part-2 Line Chart | Part-3 | Part-4 |
By: Ali Radwani
Python: Data Visualization Part-1
Learning : python, pygal, Data Visualization, Bar Chart
Subject: Data visualization using pygal library
pygal is a Data Visualization library in python to help us showing our Data as a graph. In coming several posts we will discover and learn how to use the pygal library in simple and easy configuration and style.
First we need to install pygal packeg, to do so write this:
pip install pygal
Now we need some Data to show, in this leson I am using aGalaxy Tab S4, so all the codes will be tested and applyed on trinket.io website [trinket.io alow us to use pygal package online so we don’t need to install it on our divice]
Type of Chart:
pygal has several types of charts that we can use, here we will list them all then in coming posts will use each one with simple data. So what we have:
Line, Bar, Histogram, XY, Pie, Radar, Box, Dot, Funnel, SolidGauge, Gauge, Pyramid, Treemap, Maps
Some of those charts has a sub-types such as in Bar char we have: Basic, Stacked and Horizontal. Also for each chart we can add a title and labels and we can use some styles.
So let’s start ..
First we will go for the Bar chart, and we have three sub-types as Basic, Stacked and Horizontal.
First chart: Bar chart:
In this part we will demonstrate the Bar Chart, it has three sub-types as Basic, Stacked and Horizontal.
We assume that our data is the Males and Female ages on first marage, the data will be as dictionary (later we will see how to customize each bar)
# Basic Bar Chart using pygal
import pygal
bar_chart = pygal.Bar() # To create a bar graph object
bar_chart.add('Females', [22,25,18,35,33,18])
bar_chart.add('Males', [30,20,23,31,39,44])
bar_chart.title = "Males and Females First Marage Age"
bar_chart.x_labels=(range(1,6))
bar_chart.render()
Sample code for Basic bar chart |
Another sub-type in Bar chart is Horizontal-Bar, it is semelar to the Basic but as if fliped 90 degree. Here is the code ..
# Horizontal Bar Chart using pygal
import pygal
# HorizontalBar()
HBar = pygal.HorizontalBar()
HBar.add('Females', [22,25,18,35,33,18])
HBar.add('Males', [30,20,23,31,39,44])
HBar.title = "Males and Females First Marage Age"
HBar.x_labels=(range(1,6))
HBar.render()
Sample code for Horizontal Bar chart |
Last sub-type in Bar chart is Stacked Bar were all data of each element will be in one bar. Here is the code and example..
# Stacked Bar Chart using pygal
import pygal
# StackedBar()
stackedbar = pygal.StackedBar()
stackedbar.add('Females', [22,25,18,35,33,18])
stackedbar.add('Males', [30,20,23,31,39,44])
stackedbar.x_labels=(range(1,0))
stackedbar.title = "Males and Females First Marage Age"
stackedbar.render()
If we say we have another data-set as “age in First-Divorces” and we want to add this set to the Stacked Bar chart, then we first will create the data-set as:
stackedbar.add(‘Divorses’, [35,22,45,33,40,38])
and we will arrange the code line to be at top,middle or bottom of the bar. Here is the code..
Sample code for stacke Bar chart with Divorce data
|
Next we will talk about Line chart.
:: Data Visualization using pygal ::
| Part-1Bar-Chart | Part-2 | Part-3 | Part-4 |
By: Ali Radwani
Taking pictures is not my main daily practices, but when i start playing with my camera, i really enjoy my self.
Thanks for visiting my Space..
Ali's Photography Space... 