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The Button widget in Tkinter is crucial for handling events and performing operations in GUI applications. Sometimes you need to change what a button does after it's been created and displayed. To change a button's command method after initialization, use the configure() method. This allows you to reassign the button's functionality dynamically during program execution. Syntax button.configure(command=new_function) Example Here's a complete example showing how to change a button's command method ? # Import tkinter library from tkinter import * # Create an instance of tkinter frame win = Tk() ... Read More
When working with calendar calculations, you might need to find how many times each day of the week occurs in a given month. This is useful for scheduling, payroll calculations, or planning recurring events. Understanding the Problem In any month, most days occur either 4 or 5 times. For a month with n days starting on a specific day, we need to calculate the frequency of each weekday. Algorithm Approach The solution works by: Starting with a base count of 4 for each day (since 4 × 7 = 28 days) Adding the extra ... Read More
In this article, we will see how to update the details of a workflow in AWS Glue Catalog using the boto3 library in Python. What is AWS Glue Workflow? An AWS Glue workflow is a visual representation of a multi-job ETL process. You can use workflows to design complex ETL operations that involve multiple crawlers, jobs, and triggers. The update_workflow function allows you to modify workflow properties like description and default run properties. Problem Statement Use boto3 library in Python to update details of a workflow that is created in your AWS Glue account. Required ... Read More
In this article, we will see how to update the scheduler of a crawler in AWS Glue Data Catalog using the boto3 library in Python. Problem Statement Use boto3 library in Python to update the scheduler of an existing crawler in AWS Glue. Prerequisites Before implementing the solution, ensure you have: AWS credentials configured (via AWS CLI, IAM roles, or environment variables) boto3 library installed: pip install boto3 Proper IAM permissions for Glue operations Approach to Update Crawler Schedule ... Read More
In this article, we will see how to remove tags from AWS Glue Resources using the boto3 library. AWS Glue resources can have tags for organization and cost tracking, and sometimes you need to remove specific tags programmatically. Problem Statement Use boto3 library in Python to remove tags from AWS Glue Resources like databases, tables, crawlers, and jobs. Required Parameters The untag_resource function requires two main parameters: resource_arn − The Amazon Resource Name (ARN) of the Glue resource tags_list − List of tag keys to remove ... Read More
In this article, we will see how to get the tags associated with AWS Glue Resources using the boto3 library in Python. Tags help organize and manage AWS resources by assigning key-value pairs for identification and billing purposes. AWS Glue Resource ARN Formats The resource_arn parameter requires a specific format depending on the resource type ? Resource Type ARN Format Catalog arn:aws:glue:region:account-id:catalog Database arn:aws:glue:region:account-id:database/database-name Table arn:aws:glue:region:account-id:table/database-name/table-name Connection arn:aws:glue:region:account-id:connection/connection-name Crawler arn:aws:glue:region:account-id:crawler/crawler-name Job arn:aws:glue:region:account-id:job/job-name Trigger arn:aws:glue:region:account-id:trigger/trigger-name Implementation Steps Follow ... Read More
In this article, we will see how to add tags to AWS Glue resources using the Boto3 library in Python. Tags help organize and manage your AWS resources effectively. Problem Statement Use the boto3 library in Python to add tags like "glue-db: test" to AWS Glue resources such as databases, tables, crawlers, and jobs. Understanding AWS Glue Resource ARNs Before adding tags, you need to understand the ARN format for different AWS Glue resources ? Resource Type ARN Format Catalog arn:aws:glue:region:account-id:catalog Database arn:aws:glue:region:account-id:database/database-name Table arn:aws:glue:region:account-id:table/database-name/table-name ... Read More
When it is required to create a lap timer using Python, the time module is used. The program tracks individual lap times and cumulative time using keyboard interrupts to control the timer flow. A lap timer records the duration of each lap in a sequence, commonly used in sports timing or performance tracking applications. Example import time start_time = time.time() end_time = start_time lap_num = 1 print("Click on ENTER to count laps.Press CTRL+C to stop") try: while True: input() ... Read More
When working with time calculations in Python, you often need to find the difference between the current time and a given time. This can be accomplished using Python's built-in datetime module, which provides powerful time manipulation capabilities. Method 1: Using datetime Module The most reliable approach uses Python's datetime module to get the current time and calculate differences ? from datetime import datetime, time def time_difference_from_now(target_hour, target_minute): # Get current time now = datetime.now() current_time = now.time() ... Read More
When working with dates in Python, you often need to find yesterday's, today's, and tomorrow's dates. Python's datetime module provides the timedelta class to easily calculate dates relative to the current date. Basic Date Calculation Here's how to find yesterday, today, and tomorrow using datetime.now() and timedelta ? from datetime import datetime, timedelta present = datetime.now() yesterday = present - timedelta(1) tomorrow = present + timedelta(1) print("Yesterday was :") print(yesterday.strftime('%d-%m-%Y')) print("Today is :") print(present.strftime('%d-%m-%Y')) print("Tomorrow would be :") print(tomorrow.strftime('%d-%m-%Y')) Yesterday was : 05-04-2021 Today is : 06-04-2021 Tomorrow would be : ... Read More