PyData Careers – Telegram
PyData Careers
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Python Data Science jobs, interview tips, and career insights for aspiring professionals.

Admin: @HusseinSheikho || @Hussein_Sheikho
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This channels is for Programmers, Coders, Software Engineers.

0️⃣ Python
1️⃣ Data Science
2️⃣ Machine Learning
3️⃣ Data Visualization
4️⃣ Artificial Intelligence
5️⃣ Data Analysis
6️⃣ Statistics
7️⃣ Deep Learning
8️⃣ programming Languages

https://news.1rj.ru/str/addlist/8_rRW2scgfRhOTc0

https://news.1rj.ru/str/Codeprogrammer
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When to use built-in collections in Python?

In Python, the type of collection is chosen depending on the needs: list is suitable for mutable and ordered data, tuple — for immutable sets of values, and set — for storing unique elements without order and with fast membership checking presence

@DataScienceQ
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Question from the interview

What is the difference between remove, del, and pop?

Answer: remove() removes the first matching value; del removes an element by its index; pop() removes an element by its index and returns that element.

tags:
#interview

@DataScienceQ
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Interview question

Why are metrics needed and what are the main endpoints used for collecting them?

Answer: Metrics are used to monitor the state and behavior of the system in real time. They allow you to track performance, load, the number of errors, resource usage, and identify problems before they affect users. Based on metrics, alerts are set up, degradations are analyzed, the impact of changes is assessed, and informed technical decisions are made.

To collect metrics, a separate HTTP endpoint is usually used /metrics, which provides indicators in a format understandable to monitoring systems, such as Prometheus. In addition to this, service endpoints are often used /health or /healthz to check the status of the service and /ready or /readiness to determine the application's readiness to accept traffic. These endpoints complement the metrics and are used in observability and orchestration systems.


tags: #interview

@DataScienceQ
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Question from the interview

What is a generator function?

Answer: A generator function is a function whose body contains the keyword yield. When called, such a function returns a generator object (generator object) (generator iterator).

tags: #article

@DataScienceQ
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PyData Careers
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Question from the interview

Why are break and continue needed?

Answer: They are used to control the sequence of operations: break stops the execution of the loop and transfers the execution to the next block of code, continue kind of skips to the next iteration of the loop and does not stop its execution.

tags: #interview

@DataScienceQ
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Question from the interview

What are CORS and CSRF?

Answer: CORS (Cross-Origin Resource Sharing) is a browser security mechanism that controls which external sources (domains) can access the site's resources. It protects the user from unauthorized requests from third-party sites and is implemented through HTTP headers, which the server explicitly allows or prohibits.

CSRF (Cross-Site Request Forgery) is a type of attack in which an attacker forces the user's browser to perform an unwanted request to a site on which the user is already authenticated. Protection against CSRF is usually implemented using CSRF tokens, header checks, and cookie settings.


tags: #interview

@DataScienceQ
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Interview question

What are the existing authorization models and what are their differences?

Answer: Authorization determines which actions and resources are allowed to a user after authentication. The main authorization models differ in how the access decision is made.

The role-based model (RBAC) is based on roles. A user is assigned roles, and each role defines a set of allowed actions. The model is simple to implement and widely used, but it is not well suited for complex and dynamic access rules.

The permission-based model operates with specific rights, not roles. A user is directly assigned permissions for actions or resources. This is a more flexible approach, but it is more difficult to manage with a large number of users and permissions.

The attribute-based model (ABAC) makes an access decision based on attributes of the user, the resource, and the context, such as time, location, or type of request. This is the most flexible model, but it is also the most difficult to implement and maintain.

Conclusion: RBAC is suitable for simple systems, permission-based - for more precise control, ABAC - for complex business rules and dynamic access policies.


tags: #interview

@DataScienceQ
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📚 Learning Python? Get started with a solid foundation! 💡 Two members of the Python for Beginners live course share their experiences on accountability and basic progression. 🤔️ Check it out: https://realpython.com/python-tricks/?utmsource=realpython&utmmedium=rss&utmcampaign=footer
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📚💻 Tips for Using the AI Coding Editor Cursor 👉

🔧 Are you new to using an AI-powered IDE like Cursor? Here are some tips to get you started:

• Understand why Cursor might work for you: This AI tool is designed to help Python developers write faster, more accurately, and with less effort. It's perfect for those who want to improve their coding skills without sacrificing quality.

👉 Learn how to use different modes & models: Explore the various modes available in Cursor, including Code Completion, Inline Edits, and Project-Aware Chat. Discover which mode works best for your needs.

💻 Run multiple agents at a time: With Cursor's multi-agent interface, you can run multiple tools simultaneously, speeding up development and reducing errors.

🧹 Resolve tiny merge conflicts: Cursor's Composer model ensures fast and efficient merging of code changes. Learn how to resolve small conflicts with ease.

🔍 Run a project and fix a bug: Debug your code with Cursor's built-in debugging features. Identify and fix issues quickly, making it easier to develop and test your projects.

💡 Practice using the terminal: Cursor has a comprehensive terminal support system. Get familiar with its commands and learn how to use them effectively.

📝 Save your progress: Cursor allows you to save your project at any time. Take advantage of this feature to collaborate with others or revert to previous versions if needed.

👍 Follow our channel for more Python tips and tricks! 🐍💻
Stay updated on the latest developments in the world of Python programming
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🔬 Python 3.14: The Year of Developer Focused Improvements 📈

In 2025, Python 3.14 arrived with a wave of developer-focused improvements that will benefit you throughout 2026 and beyond.

• Lazy Annotations: Finally resolved long-standing type hinting quirks.
• t-Strings: More control over string interpolation with the introduction of t-strings.

These changes make Python 3.14 a great choice for developers who want to take their coding skills to the next level. Whether you're working on a data science project or building a machine learning model, Python 3.14 is worth checking out! 🐍
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🔹 🚀 FastAPI: Building Fast and Scalable Web Applications with Python 🔹 🚀

Today on Talk Python, we dive into the world of web frameworks in production. Our creators behind FastAPI, Flask, Django, Quart, and Litestar share practical advice on deployment patterns, async gotchas, servers, scaling, and more.

FastAPI is built to be fast, scalable, and maintainable. With its async support and route-based architecture, it's ideal for building high-performance web applications. However, like any framework, it has its own set of challenges to learn.

Here are some key takeaways from our conversation:

• Deployment patterns: FastAPI supports multiple deployment options, including standalone servers, Docker containers, and cloud platforms.
• Async gotchas: Be aware of the differences between synchronous and asynchronous code when working with databases or file I/O.
• Servers and scaling: Optimize server performance by using caching, limiting concurrency, and utilizing load balancing techniques.
• Scaling: Use containerization (e.g., Docker) to build and deploy scalable applications.

For more information on FastAPI and web frameworks in production, check out the following resources:

📚 Talk Python Courses: "Python for DevOps" 📚
👉 https://talkpython.fm/training
🔹 Python in Production: "FastAPI and Flask with Docker and Kubernetes" 🔹

Save it, and happy coding! 👏
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# 🚀 Building a scalable Python app: Best practices and lessons learned

🔗 As you build and deploy your Python applications, it's essential to know when to scale up and when to scale down. In this post, we'll explore the best practices for deploying Python apps on various servers and scaling them for high traffic.

Key takeaways

Use a load balancer to distribute incoming traffic across multiple instances
Choose an appropriate server type based on your application's requirements (e.g., AWS EC2, Google Cloud)
Optimize database queries and schema for performance
Implement caching mechanisms to reduce the load on your servers

📊 Let's dive deeper into each of these topics.

Load Balancing

A load balancer is a network device that distributes incoming traffic across multiple server instances. This helps ensure:

Even resource utilization across all instances
Reduced latency for users accessing your application
Improved overall system reliability

For example, with FastAPI, you can use the
xray detector plugin to automatically detect and distribute incoming requests across multiple instances.

Server Selection

Choose a suitable server type based on your application's requirements. Some popular options include:

AWS EC2 (Elastic Compute Cloud)
Google Cloud
DigitalOcean
Heroku

Consider factors such as:

Resource utilization: How many CPU cores, memory, and storage do you need?
Scalability: Can the server scale up or down quickly to handle increased traffic?
Cost: What are your ongoing costs for servers, storage, and bandwidth?

Database Optimization

Optimize database queries and schema to improve performance. This can be achieved by:

Using indexing techniques
Optimizing query execution plans
Implementing caching mechanisms

For example, with Django, you can use the
django.db.backends.sqlite3 backend to store your data in a SQLite database.

Caching Mechanisms

Implement caching mechanisms to reduce the load on your servers. Some popular options include:

Memcached
Redis
Flask-Caching

These libraries can cache frequently accessed data, reducing the number of requests made to your server.

👍 By following these best practices and lessons learned, you'll be well on your way to building scalable and high-performing Python applications.
Save it! 💻
2
🚀 Running FastAPI Apps in Production: A Practical Guide 🚀

Here's a quick rundown of how to run your FastAPI app in production:

• Deployment patterns: Your app should be deployed as a WSGI application, with a standard configuration file (e.g., wsgi.py) and a command-line interface.
• Async gotchas: Avoid using synchronous code where possible. Instead, use asynchronous I/O to handle blocking operations like database queries or network requests.
• Servers: Choose a suitable server for your app, such as the official FastAPI server or an external load balancer.
• Scaling: Optimize your app's performance and scalability by using caching, queuing systems (e.g., Celery), and load balancing.
• Additional tips:
  Keep your code organized and maintainable with tools like virtual environments and dependency management.
 
Test your app thoroughly in a development environment before deploying it to production.

For Django, follow these steps:

1. Create a new project using the django-admin command.
2. Install the required dependencies (e.g., fastapi-django).
3. Configure your database and other settings as needed.
4. Run the app with python manage.py runserver.

For Flask, follow these steps:

1. Install the required dependencies (e.g., flask-asyncio).
2. Create a new application using the flask command.
3. Define routes and templates as needed.

Remember to keep your code up-to-date and secure!🔒
1
📊 Python Mastery - E2E Security and Performance Testing

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• Automated E2E testing: Run tests on local environments with ease
• Security features: Protect against common vulnerabilities and attacks
• Performance optimization: Identify bottlenecks and improve overall speed

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🔍 PySpector: A Hybrid Python SAST Framework

Summary:

PySpector is an open-source hybrid framework for static analysis security testing (SAST) in Python. It combines a Rust core with a Python CLI, addressing two common challenges in existing Python security scanners: performance issues and lack of deeper analysis.

Key Features:

• Fast, parallel analysis via a Rust core (71% faster than Bandit, 16.6x faster than Semgrep)
• Python-based orchestration for extensibility
• Multi-layered detection using regex, AST analysis, and taint flow tracking
• Static rules for LLM/AI model vulnerabilities
• TUI for triaging issues

What You Can Do with PySpector:

1. Boost performance in large codebases with faster analysis.
2. Improve your security scanning experience with deeper analysis capabilities.

Learn More: Check out the official PySpector repository and documentation for more information. Save it for later! 👉 #PySpector🚀
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