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Problem Statement: Use boto3 library in Python to paginate through all objects of a S3 bucket from AWS Glue Data Catalog that is created in your accountApproach/Algorithm to solve this problemStep 1: Import boto3 and botocore exceptions to handle exceptions.Step 2: max_items, page_size and starting_token are the optional parameters for this function, while bucket_name is the required parameter.max_items denote the total number of records to return. If the number of available records > max_items, then a NextToken will be provided in the response to resume pagination.page_size denotes the size of each page.starting_token helps to paginate, and it uses last key ... Read More
In this post, we will understand the difference between Time Sharing and Real-Time Operating System −Time Sharing Operating SystemIn this type of operating system, a quick response is required to be given when a request comes in.It has a switching method.Any kind of modifications can be done to the program.The resources of the computer are shared externally.It deals with multiple processes and applications simultaneously.The response to a user request is given within seconds of time.Real-Time Operating SystemIn this operating system, the computation tasks are required to be given more importance before its nominative point.It doesn’t have a switching method.No modification ... Read More
In this post, we will understand the difference between network operating system and a distributed operating system.Network Operating SystemThe main object of this system is to provide local services to remote clients.The communication takes place depending on the files.It is more scalable in comparison to Distributed Operating System.It has less fault tolerance.The rate of autonomy in a network operating system is high.It is easy to implement.The nodes of a network operating system can have different operating system.Distributed Operating SystemThe main objective of this system is to manage the resources of the hardware.The communication takes place depending on messages and shared ... Read More
Tkinter Pack geometry manager is the bounding box for all the widgets. It helps the parent widget to hold and display all the containing widgets in it. It is easy to use and we can display any widgets by using the pack() method. Additionally, pack manager has several other properties like side, fill, expand, anchor, and padding which can be used to style the widgets in an application.There is another useful way to hold and represent the widgets in a twodimensional table that is divided into rows and columns. Each row and column is made up of a Cell and ... Read More
In order to structure the layout of the widgets in an application, we generally use the tkinter grid system. A grid system comprises rows and columns in which widgets are aligned. If we want to configure any widgets, then we can use the grid row and columns properties.Consider, if a widget is aligned such that there is extra space left, then we can add the weight property which enables the column to grow. A non-zero weight enables the column width to grow in the screen size if there is any extra space left. However, if the weight is zero, then ... Read More
To display the text and images in an application window, we generally use the Tkinter Label widget. In this example, we will update the Label information by defining a variable. Whenever the information stored in the variable changes, it will update the Label as well. We can change the Label information while defining the textvariable property in the Label widget.Example#Import the required library from tkinter import * #Create an instance of tkinter frame win = Tk() win.geometry("750x250") #Create a String Object and set the default value var = StringVar() #Create a text label label = Label(win, textvariable = var, font=('Helvetica ... Read More
Tkinter label widgets can be styled using the predefined attributes and functions in the library. Labels are useful in place of adding text and displaying images in the application. Sometimes, we need to style the font property of Label Text such as fontfamily, font-style (Bold, strike, underline, etc.), font-size, and many more. If we want to make the label text underlined, then we can use the underline property in the font attribute.Example#Import the required library from tkinter import* #Create an instance of tkinter frame win= Tk() #Define geometry of the window win.geometry("750x250") #Create a Label widget label= Label(win, text= "Hey, ... Read More
Let’s suppose you want to organize a set of widgets inside an application window, then you can use Frames. Tkinter Frames are generally used to organize and group many widgets. For a particular application, we can also add a scrollbar in the frames. In order to add a scrollbar, we generally use to the Scrollbar(...options) function.Example#Import the required library from tkinter import * #Create an instance of tkinter frame or window win = Tk() #Define the geometry win.geometry("750x400") #Create a Frame frame= Frame(win) def close(): win.destroy() #Create a Label widget in the frame text= Label(frame, text= "Register", font= ('Helvetica ... Read More
Tkinter has many universal methods that add functionalities to widgets and elements. In order to set the focus to a particular widget, we have the focus_set() method which is used to focus a specific widget in a group of widgets present in an application.ExampleIn this example, we have created numeric keys in the range 0-9. We have set the focus for Numeric key ‘2’.#Import the required libraries from tkinter import * import webbrowser #Create an instance of tkinter frame win = Tk() win.geometry("750x400") #Define function for different operations def close(): win.destroy() #Create a Label widget text=Label(win, text="", font=('Helvetica bold ... Read More
Tkinter text widgets are used for creating text fields that contain multiline user input. It has many inbuilt functions and methods which can be invoked to perform certain operations on text widgets. In contrast, let us assume that we have written a bunch of context in the text widget and if we want to select all the text, then we can use tag_add(tag, range) to select the text and add tag and tag_configure(tag, options) to style the tag property.Example#Import tkinter library from tkinter import * #Create an instance of tkinter frame win = Tk() #Set the geometry win.geometry("750x200") def select_text(): ... Read More