### Archive

Archive for the ‘Learning’ Category

## 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: 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.x_labels=map(str,range(2000,2006))

line_chart.title = "Males and Females first Marage Age (average)"

line_chart.render()
```

Line-chart: Stacked Line Stacked chart (fill) will put all the data in top of each other. Here is the code.

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.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.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

## Python: Data Visualization Part-1

January 6, 2021 1 comment

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,
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.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.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.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:
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

Learning : Python Project

In this function we will use the string library to select a random X numbers of letters as a Password length and print it on the screen.

First: We create a list of letters type l_type that hold the following: lowercase, uppercase, digits, punctuation and we will use the (random.choice) to select from the list.
Then we will call the ‘password Generator’ pass_generator function torandomly select a letter based on the selected type, we will do so for a X time (X is the length of the password). In this project we will print the password on the screen, in real-life we can send the password via email or SMS. Here is the Code ..

```# Password Generator Function

"""

Date: Des-2020

This function will use the string library to select a random X numbers of letters as a Password and print it on the screen.

We create a list of letter type l_type that hold the following lowercase, uppercase, digits, punctuation and we will
use the (random.choice) to select from the list, then we will call the 'password Generator' pass_generator function to
randomly select a letter, we will do so for a X time (X is the length of the password). In this project we will print
the password on the screen, in real-life we can send the password via email or SMS.

"""

import random, string

l_type = ["lowercase","uppercase","digits","punctuation"]

def pass_generator(lt) :
if lt =="lowercase":

elif lt =="uppercase" :

elif lt =="digits" :

elif lt =="punctuation":

pass_length = int(input("\n   Enter the password Length: > "))

pass_generator(random.choice(l_type))

```

## Library System with Excel -P4

Learning :Excel formulas and VBA Cods
Subject: To Develop a Library System with Excel

In last post we wrote all the codes needed to Manage the Authors.

In this part we will do all the coding needed to enter New Books and Edit or Delete anyone we select, in Classifications and Authors we were dealing with one attribute, but here with Books Manage form we have several pieces of information to collect from the user such as [Book Title, Book Author, Book Classification, Publish date, Notes, Book Language ]. So first let’s design the form..

1. Open the Books sheet
2. Change the color of the range(B6:E24)
3. In Cell B6 write “Select a Book to Edit or Delete”, Color and format it as you want.

4. In Cell H6 write “Books Form”, Color and format it as you want.

5. Color and format the Range (B6:L26) as you want.
6. Create three rectangular shapes as New, Delete, and Save buttons.
7. Create another three small rectangular shapes write “+” inside them.
5. We need to create a ListBox name it “books_ListBox 4”.
6. Arrange everything as in the image.

Now move to the “setting” sheet and write the following: B4:Books, B5:current_book, C5:1, B6:mode, C6: edit.

Then in the “Data” Sheet starting from A1 write the following:
A1:Books Data, B1:BookTitle, C1:book_author, D1:class, E1:Published, F1:Note, G1:lang
A2:ID, B2:Title, C2:Author, D2:Class, E2:Published, F2:Note, G2:language

CODING:

To copy the list of the Books we have into the books_ListBox 4 we create:
1.1 From the Menu go to Formulas and click on Name Manager.
1.2 From the pop-up screen click on New, then write books_list in Name, and =OFFSET(Data!\$B\$3,,,COUNTA(Data!\$B:\$B)) in Refers to.

2.1. Select books_ListBox 4 on the Books sheet.
2.2. Right-click the mouse, and select FormatControl.
2.3. Goto Control Tab, and in Input range write: books_list, and in Cell link write Setting!\$C\$5 then press OK.

Now the listBox will contain the Books we have in the Books table in Data Sheet. (If we have any Data there)
3. Data Validation: We need to create Data Validation-list in the cells K12: for Authors list, K14: for Classifications list and K18: for Language list.
1. Select K12, from Data-menu click on Data-validation, select List then in the source type this: =OFFSET(Data!\$K\$3,,,COUNTA(Data!\$K:\$K))
2. Select K14, from Data-menu click on Data-validation, select List then in the source type this: =OFFSET(Data!\$P\$3,,,COUNTA(Data!\$P:\$P))
3. Select K18, from Data-menu click on Data-validation, select List then in the source type this: =OFFSET(Data!\$M\$3,,,COUNTA(Data!\$M:\$M))

book_new_Click() In this function we will Clear all cells [k8, k10,k12,k14,k16,k18, K20] also the note_TextBox1 and will change the cell C6 in Setting Sheet to “new”. Here is the code..

Sub book_new_Click()

‘ Clear all cells.
Sheets(“Books”).Range(“K8”).Value = “” ‘ID/number
Sheets(“Books”).Range(“K10”).Value = “” ‘Title
Sheets(“Books”).Range(“K12”).Value = “” ‘Author name
Sheets(“Books”).Range(“K14”).Value = “” ‘classification
Sheets(“Books”).Range(“K16”).Value = “” ‘published date
Sheets(“Books”).Range(“K18”).Value = “” ‘language
Sheets(“Books”).Range(“K20”).Value = “” ‘note
Sheets(“Books”).note_TextBox1 = “”

‘ change book mode to “new”
Sheets(“setting”).Range(“c6”).Value = “new”

Sheets(“Books”).Range(“K8”).Select

End Sub

now in the Books sheet select the button “New” we create and assign the “book_new_Click” macro to it.

book_save_Click() The Save function will have tow parts, if the user click on New then we will have:

Sheets(“setting”).Range(“C6”).Value = “new” in this case we will copy all the Book Data from Range(“K8”),Range(“K10”),Range(“K12”),Range(“K14”),Range(“K16”),Range(“K18”) and the value of the note_TextBox1 to the Data sheet under Boos Table, then will empty all the range in the book form, also will pop-up a MsgBox ” One New Book has been Added.”.

if Sheets(“setting”).Range(“C6”).Value = “edit” in this case we will get the current selected book location by selected_book = Sheets(“setting”).Range(“C5”).Value + 2 then re-copy the book data from the form to the Book Table in the Data Sheet and pop-up MsgBox ” One Book Data has been Updated.”.

In Books form we have also three + buttons next to Author, Classification and Language cells, if the user did not find say the Author in the list then he/she can add new one by clicking on the +

Edit Book Data: The user can select any Book from the Book List on the left-hand list then it’s Data will show-up in the form, the user then can change any of the Book-Data and press on Save.

book_delete_Click() The user will select the Book to de deleted then click on “Delete” button, a massage will pop-up to make sure that Book will be DELETED, if the user confirm the cation (press OK) we will run this line of code:

‘To get the book row number.
selected_book = Sheets(“setting”).Range(“C5”).Value + 2
‘To delete the book row
Sheets(“data”).Range(“A” & selected_book & “:G” & selected_book).Delete Shift:=xlUp

Pressing the (+) button: We have three (+) buttons in this form to add New Authors, Classifications, and Languages if not exist in the list; for example, if the user couldn’t find the Author of the Book (he/she want to enter to the system) pressing the (+) will pop-up a dialog box to Enter New Author and the same for classification and Language. Here is the code..

Sub book_form_new_author()

Sheets(“Books”).Range(“K12”).Value = “”
new_author_name = InputBox(“Enter a New Author Name and Click OK:”, “:: New Author :: “)

‘if we add new author then save it.
If new_author_name > “” Then
‘ Get next empty row
next_row = Sheets(“Data”).Range(“K” & Rows.Count).End(xlUp).Offset(1).Row
Sheets(“Data”).Range(“K” & next_row) = new_author_name
Sheets(“Books”).Range(“K12”).Value = new_author_name ‘Author name
Sheets(“setting”).Range(“F6”).Value = “still”

‘ To Sort the Authors list
next_row = Sheets(“Data”).Range(“K” & Rows.Count).End(xlUp).Offset(1).Row
Sheets(“Data”).Range(“K3:K” & next_row – 1).SortSpecial SortMethod:=xlPinYin

End If
Sheets(“Books”).Range(“K12”).Select

End Sub

End of Part-4

Recap this part:
1. We Create the Books header Tabke.
2. We Create a form to collect the Books from the user.
3. We Create the Books ListBox.
4. We wrote the VBA code to Save, Delete, and Create New Book also to retrieve the Books information into Books ListBox.
5. We let the user to Enter New Author, classification, Language into the system through a dialog box.

:: Library System with Excel ::

 Part 1 Part 2 Part 3 Part 4 Part 5

## Python: Spirograph

Learning : Python
Subject: Writing Python codes to generate Spirograph Art

Writing codes to draw always funny time for me, playing around numbers, changing attributes to get something new and changing it again .. and again ..
In this post, we will write a code to draw some spirograph shapes, easy and shrort code will do the job. So lets Start ..

We will use Python Library turtle to draw, and will write one Function call it def draw_it(h,sz,ang) will take three arguments: h:number of heads, sz: size, ang: angle, then we will call this function to draw our Spirograph Art.
Code:
First we will set-up the turtle:

```# turtle set-up
import turtle
t = turtle.Turtle()
t.shape("dot")
t.speed(0)

t.hideturtle()```

Then here is the main Function to draw our graphs

```# draw_it() function

def draw_it(h,sz,ang) :
c = 0
while True :
for i in range (h) :
t.forward(sz)
t.right(360/h)

t.right(ang)
c +=1
if c >=360/ang :
break
```

Then we call the function and pass the parameters, I tried several combinations and will include them in the source file in Download section. Here are some out-puts.

 Calling: t.pencolor(‘lightgray’) draw_it(19,19,19) t.pencolor(‘gray’) draw_it(17,17,17) t.pencolor(‘black’) draw_it(15,15,15)

Hope you enjoy, have fun and change the numbers to get new shapes ..

## Library System with Excel -P3

Learning :Excel formulas and VBA Cods
Subject: To Develop a Library System with Excel

In last post we wrote all the codes needed to Manage the Classifications.

In this part we will do all the coding needed to enter the Authors and Edit or Delete anyone we select, so first we will go to the “setting” sheet and will write the following: E5:current_author, F5:1, E6:mode, F6: edit as in the image.

Now in the “Data” sheets, we create a table with “Author Name” header on range K2, then enter any Autor name such as “Albert” as in the image.

Now, we move to “Authors” Sheet and do the following:
1. In Cell B6 write “Select an Author to Edit or Delete”, Color and format it as you want.
2. In Cell H6 write “Authors Form”, Color and format it as you want.

3. Color and format the Range (B6:E19) and the Range (H6:K13) as you want.
4. Create three rectangular shapes as New, Delete, and Save buttons.
5. We need to create a ListBox name it “authors_ListBox1”.
6. Arrange everything as in the image.

CODING:
To copy the list of the Authors we have into the ListBox:
1.1 From the Menu goto Formulas and click on Name Manager

1.2 From the pop-up screen click on New, then write author_list in Name, and =OFFSET(Data!\$K\$3,,,COUNTA(Data!\$K:\$K)) in Refers to [as in image]

2.1. Select the ListBox in the Authors sheet.
2.2. Right-click the mouse, and select FormatControl.
2.3. Goto Control Tab, and in Input range write: author_list, and in Cell link write Setting!\$F\$5 then press OK.

Now the listBox will contain the Authors we have in the Author list in Data Sheep. … [SEE THE IMAGE]

ListBox Code:
Now we will write a three lines of code to take action when we select any things in this box, so select the ListBox, click right-mouse-button, select “Assinge Macro, then the VBA application will start and write the foloing code:

Sub authors_ListBox1_Change()

selected_author = Sheets(“Setting”).Range(“F5”).Value + 2
Sheets(“authors”).Range(“j9”).Value = Sheets(“data”).Range(“K” & selected_author)
Sheets(“Setting”).Range(“F6”).Value = “edit”

End Sub

Buttons Codes:
1. While in Authors sheet, select the rectangular shape named “New”, click right-mouse-button, select “Assinge Macro, then the VBA application will start and we will write this code:

Sub author_new_Click()
Sheets(“authors”).Range(“J9”).ClearContents
Sheets(“Setting”).Range(“F6”).Value = “new”
Sheets(“Authors”).Range(“J9”).Select
End Sub

2. While the VBA application is on, we will write all the codes we need for Edit and Delete buttons and then will assign the macros:
author_delete_Click

Sub author_delete_Click()

If Not Sheets(“setting”).Range(“F5”).Value Then
MsgBox “Nothing selected to be Deleted..”
Exit Sub
End If

answer = MsgBox(“Are you sure you want to DELETE this Author?.”, vbQuestion + vbYesNo)
current_select = Sheets(“setting”).Range(“F5”).Value + 2
Sheets(“Data”).Range(“K” & current_select).ClearContents

next_row = Sheets(“Data”).Range(“K” & Rows.Count).End(xlUp).Offset(1).Row
Sheets(“Data”).Range(“K3:K” & next_row – 1).SortSpecial SortMethod:=xlPinYin
authors_ListBox1_Change

MsgBox “One Author has been Deleted..”
Else
MsgBox “OK, Nothing will be changed.”
End If
End Sub

author_save_Click

Sub author_save_Click()

If Sheets(“authors”).Range(“J9”).Value = Empty Then
MsgBox “There is no Author Name to Save.”
Exit Sub

End If

If Sheets(“Setting”).Range(“F6”).Value = “new” Then

‘ Get next empty row
next_row = Sheets(“Data”).Range(“K” & Rows.Count).End(xlUp).Offset(1).Row

‘ copy the new classification to the data-table
Sheets(“authors”).Range(“j9”) = StrConv(Sheets(“authors”).Range(“J9”), vbProperCase)
Sheets(“Data”).Range(“K” & next_row).Value = Sheets(“Authors”).Range(“J9”)

‘ Empty the form
Sheets(“Authors”).Range(“J9″).ClearContents
MsgBox ” One New Author Name Saved.”

‘ To Sort the classifications
next_row = Sheets(“Data”).Range(“K” & Rows.Count).End(xlUp).Offset(1).Row
Sheets(“Data”).Range(“K3:K” & next_row – 1).SortSpecial SortMethod:=xlPinYin
authors_ListBox1_Change
Exit Sub

End If

If Sheets(“setting”).Range(“F6”).Value = “edit” Then

selected_author = Sheets(“Setting”).Range(“F5”).Value + 2
Sheets(“authors”).Range(“J9”) = StrConv(Sheets(“authors”).Range(“J9”), vbProperCase)
Sheets(“data”).Range(“K” & selected_author) = Sheets(“authors”).Range(“J9″).Value
MsgBox ” One Author Name Changed.”

‘ Sort the Authors Name
next_row = Sheets(“Data”).Range(“K” & Rows.Count).End(xlUp).Offset(1).Row
Sheets(“Data”).Range(“K3:K” & next_row).SortSpecial SortMethod:=xlPinYin
authors_ListBox1_Change
Exit Sub
End If

End Sub

In the Save code we re-sort the data in the ListBox. Here is a part of the code we use to do so:
‘ Sort the Authors Name
next_row = Sheets(“Data”).Range(“K” & Rows.Count).End(xlUp).Offset(1).Row
Sheets(“Data”).Range(“K3:K” & next_row).SortSpecial SortMethod:=xlPinYin
authors_ListBox1_Change

New we can assign the macros we just creates to the buttons we have (Delete and Save).

End of Part-3

Recap this part:
1. We Create an Author list.
2. We Create a form to collect the Author from the user.
3. We Create the Author ListBox.
4. We wrote the VBA code to Save, Delete, and Create New Author also to retrieve the Author into Author ListBox.

:: Library System with Excel ::

 Part 1 Part 2 Part 3 Part 4 Part 5

## Library System with Excel -P2

Learning :Excel formulas and VBA Cods
Subject: To Develop a Library System with Excel

In last post we create the sheets and work on the Menus.

In this part we will do all the coding needed to enter the classifications and Edit or Delete anyone we select, so first we will go to the “setting” sheet and will write the following: B4:Books, E4:Authors, H4:Classification as in the image.

Now in the “Data” sheets, we create a table with “classifications” header on range P2, then enter any classification such as “art” as in image.

Now, we move to “Classification” Sheet and do the following:
1. In Cell B6 write “Select a Classification to Edit or Delete”, Color and format it as you want.
2. In Cell H6 write “Classifications Form”, Color and format it as you want.

3. Color and format the Range (B7:F20) and the Range (H7:M12) as you want.
4. Create three rectangular shape as New, Delete, and Save buttons,
5. We need to create a ListBox name it “class_ListBox1”.
6. Arrange everything as in the image.

CODING:
1. To copy the list of the classification we have into the ListBox:
1.1. Select the ListBox.
1.2. Right-click the mouse, and select FormatControl.
1.3. Goto Control Tab, and in Input range write: class_list, and in Cell link write setting!\$I\$5 then press OK.

Now the listBox will contain the Classifications we have in the classification list in Data Sheep. … [SEE THE IMAGE]

ListBox Code:
Now we will write a three lines of code to take action when we select any things in this box, so select the ListBox, click right-mouse-button, select “Assinge Macro, then the VBA application will start and write the foloing code:

Sub class_ListBox1_Change()

selected_class = Sheets(“Setting”).Range(“I5”).Value + 2
Sheets(“classifications”).Range(“K8”).Value = Sheets(“data”).Range(“P” & selected_class)
Sheets(“Setting”).Range(“I6”).Value = “edit”

End Sub

Buttons Codes:
1. Select the rectangular shape named “New”, click right-mouse-button, select “Assinge Macro, then the VBA application will start and we
will write this code:

Sub class_new_Click()
Sheets(“classifications”).Range(“k8”).ClearContents
Sheets(“Setting”).Range(“I6”).Value = “new”
End Sub

2. While the VBA application is on, we will write all the codes we need for Edit and Delete buttons and then will assign the macros:
class_delete_Click

Sub class_delete_Click()

If Not Sheets(“setting”).Range(“I5”).Value Then

End Sub
End If

answer = MsgBox(“Are you sure you want to DELETE this Classification?.”, vbQuestion + vbYesNo)
current_select = Sheets(“setting”).Range(“I5”).Value + 2
Sheets(“Data”).Range(“P” & current_select).ClearContents

next_row = Sheets(“Data”).Range(“P” & Rows.Count).End(xlUp).Offset(1).Row
Sheets(“Data”).Range(“P3:P” & next_row – 1).SortSpecial SortMethod:=xlPinYin
class_ListBox1_Change

MsgBox “One Classification has been Deleted..”
Else
MsgBox “OK, Nothing will be changed.”
End If

End Sub

class_save_Click

Sub class_save_Click()

If Sheets(“classifications”).Range(“K8”).Value = Empty Then
MsgBox “There is no Classification to Save.”
Exit Sub

End If

If Sheets(“Setting”).Range(“I6”).Value = “new” Then

‘ Get next empty row
next_row = Sheets(“Data”).Range(“P” & Rows.Count).End(xlUp).Offset(1).Row

‘ copy the new classification to the data-table
Sheets(“Classifications”).Range(“K8”) = StrConv(Sheets(“Classifications”).Range(“K8”), vbProperCase)
Sheets(“Data”).Range(“P” & next_row).Value = Sheets(“Classifications”).Range(“K8”)

‘ Empty the form
Sheets(“classifications”).Range(“k8″).ClearContents
MsgBox ” One New Classification Saved.”

‘ To Sort the classifications
next_row = Sheets(“Data”).Range(“P” & Rows.Count).End(xlUp).Offset(1).Row
Sheets(“Data”).Range(“P3:P” & next_row – 1).SortSpecial SortMethod:=xlPinYin
class_ListBox1_Change
Exit Sub

End If

If Sheets(“setting”).Range(“I6”).Value = “edit” Then

selected_class = Sheets(“Setting”).Range(“I5”).Value + 2
Sheets(“Classifications”).Range(“K8”) = StrConv(Sheets(“Classifications”).Range(“K8”), vbProperCase)
Sheets(“data”).Range(“P” & selected_class) = Sheets(“classifications”).Range(“K8″).Value
MsgBox ” One Classification Changed.”

‘ Sort the classifications
next_row = Sheets(“Data”).Range(“P” & Rows.Count).End(xlUp).Offset(1).Row
Sheets(“Data”).Range(“P3:P” & next_row).SortSpecial SortMethod:=xlPinYin

class_ListBox1_Change
Exit Sub
End If

End Sub

In the Save code we check if the K8 Cell is empty before we save it, and then we also re-sort the data in the ListBox. Here is a part of the code ..

Recap this part:
1. We Create a classification list.
2. We Create a form to collect the classifications from the user.
3. We Create the classification ListBox.
4. We wrote the VBA code to Save, Delete, and Create New classification also to retrieve the classifications into classification ListBox.

:: Library System with Excel ::

 Part 1 Part 2 Part 3 Part 4

## Library System with Excel -P1

Learning :Excel formulas and VBA Cods
Subject: To Develop a Library System with Excel

Someone asked if we can do the Library Management system using Excel, so in the coming several posts we will try to develop an Excel File to store our Books. So I will stop the CRM Project and will work on Library System, we will use MS-EXCEL and VBA code to create a simple spreadsheet looking after our Books.

To start, do the following:
1. We will create an empty Excel file and call it “my Library System” and save it as “Excel Macro-Enabled Workbook.xlsm”
2. Create 7 Tabs(Sheets), name them as:
Menu, Books, Authors, Classifications, Data, Setting, Summary

In this post (Part-1), we will work on the Menu sheet, I will not concern about the themes and colors or fonts all this is back to each user to do formating as needed. So let’s begin with creating four buttons using the insert – shapes Rectangle: Rounded Corners.

We need to create four Rectangle: Rounded Corners, align them as you want and use any theme color, then give each a Captions as in the coming image..

Now, select the Books Button and with Right-Mouse-button select “Assign Macro” and from the new Assign Macro pop-up screen click on New.

This will launch the VBA Application with an open window to write our code, here is the code that if the user clicks on ‘SAY’: Books-Button the Books Sheet will be selected. In coming image, you will find the codes for all buttons we have in the Menu.

Also, we create a code to take us back to the Menu sheets and we call the button MENU, we will add this Button to all sheets we have.

Recap this part:

• 1. We Create an Excel file.
• 2. We Create 7 Sheets and named them.
• 3. We Create Buttons for the Menu Sheet.
• 4. We Create the Home Button.
• 5. We wrote the VBA code so we /the user can navigate thrugh the system.

:: Library System with Excel ::

 Part 1 Part 2 Part 3 Part 4

## Excel Simple CRM System P1

Learning : Excel Simple CRM System
Subject: Create Excel Form, Dynamic Name Range and VBA Code to build a simple CRM system.

In this short project we will learn how to create a simple CRM system and and will build forms to collect needed data and store it in tables.

Case Study:
We want to create a simple CRM system to collect data about our employees such as [Name, Department, Salary], we will keep the system (Forms and codes as simple as we can). In this part, we will work on fomrs and code to collect the Employee data.

First, we will open an Excel file, and will create Three Tabs (Sheets), and will name them [Form, Data, Table]. As in figure 1

 As in figure 1

Now try to create the formes for Employee and another for Departments (Download the Excel file here).

Then in the Data Sheet starting from A1 create a table as A1: Name, B1: Department, C1: Salary, and in the F1 we will create a table named Department List. As in figure 2

 figure 2

and enter one row of data as in figure 2. Then we also need to create a Dynamic Name Range, for both employee name and Department List, to do so we:
1. Go to Data Sheet.
2. Select the Employee table that we create.
3. in the “NameBox” just give the table a name as “emp”.

Do the same to the Department List table dep_list, we will use these names later.

Coding: Now we will write the VBA code to make a list of Departments we have. To do so we will select the button of SAVE under the Department Form, Click the Right mouse button, and select Assign Macro, then select New and OK, after that the VBA application will start. We will write this code:

Sub save_new_dep()

‘ Get the next empty row
next_row = Sheets(“Data”).Range(“F” & Rows.Count).End(xlUp).Offset(1).Row

Sheets(“data”).Range(“F” & next_row).Value = Sheets(“form”).Range(“J7”)
Sheets(“form”).Range(“J7”).ClearContents

End Sub

 figuer 4

In this line
next_row = Sheets(“Data”).Range(“F” & Rows.Count).End(xlUp).Offset(1).Row we will get the next empty row in the department list.

in this line Sheets(“data”).Range(“F” & next_row).Value = Sheets(“form”).Range(“J7”) we will copy the date we just enter as a New Department to the Data Sheet Depatrtment List. Then with Sheets(“form”).Range(“J7”).ClearContents we will clear the content.

So now we can enter some department names: IT, Fin, Economy

We will do the same thing for the Employee Form, so with an open VBA application write the following code. as in figure 5

Sub save_new_emp()

‘ Get the next empty row
next_row = Sheets(“Data”).Range(“A” & Rows.Count).End(xlUp).Offset(1).Row

‘ Copy the Data
Sheets(“data”).Range(“A” & next_row).Value = Sheets(“form”).Range(“D7”)
Sheets(“data”).Range(“B” & next_row).Value = Sheets(“form”).Range(“D8”)
Sheets(“data”).Range(“C” & next_row).Value = Sheets(“form”).Range(“D9”)

‘ Clear the Form
Sheets(“form”).Range(“D7”).ClearContents
Sheets(“form”).Range(“D8”).ClearContents
Sheets(“form”).Range(“D9”).ClearContents

End Sub

 figure 5

The first line of the code is to get the next empty line in the Employee table, then we will use it to copy the data from the form to the data table. In my form, the Name is in D7, the Department in D8, and the Salary in D9. here is the code line for the name: Sheets(“data”).Range(“A” & next_row).Value = Sheets(“form”).Range(“D7”), then we clear the form as we did with the Department form. In the Employee form (Range”D9″) we need to make it as a DropDown list of all Departments we have so we can select from the list, to do that follow the coming steps ..
1. Select Cell D9.
2. From the Menu Select Data then Data Validation, a popup box will apear as in figure 6, do as shown, here we will use the Dynamic Name range we create “dep_list” as a source. figure 6

 figure 6

At this point we have two Forms, one for the Department List and one for the Employee (Name, Department, Salary), both forms has SAVE buttons, the Data will be saved in the Data Sheet