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When deploying and running Python code on cloud-based clusters using Ray, one specific technical detail to focus on is the use of
When applying the
Source: https://towardsdatascience.com/ray-distributed-computing-for-all-part-2/
ray.remote decorator.When applying the
@ray.remote decorator to your Python functions, ensure that each function takes a single argument (the object being acted upon) and returns a value. This allows Ray to properly serialize and de-serialize data for distributed computing. For example:import ray
@ray.remote
def my_function(x):
# do some computation on x
return result
Source: https://towardsdatascience.com/ray-distributed-computing-for-all-part-2/
Towards Data Science
Ray: Distributed Computing For All, Part 2 | Towards Data Science
Deploying and running Python code on cloud-based clusters
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Why shouldn't you compare two
float values using "=="?Answer:
tags: #interview
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🔬 Optimizing Python Code for Scalability📈
As your data grows, ensuring the performance of your Python code becomes crucial. Automated tests can help you catch degraded performance issues before they impact your application's reliability.
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Check out the latest updates in pandas 3.0, including new features for data manipulation and analysis. Christopher Trudeau's latest episode is now available!
As your data grows, ensuring the performance of your Python code becomes crucial. Automated tests can help you catch degraded performance issues before they impact your application's reliability.
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• Parallel processing using libraries like Pandas and joblib
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How long does it really take to learn Python?
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How long does it really take to learn Python?
Most beginners can learn core Python fundamentals in about 2-6 months with consistent practice. However, writing a tiny noscript in days or weeks is just the beginning - real confidence comes from projects and feedback.
Key Takeaways:
• Learn core Python fundamentals in 2-6 months.
• Write a tiny noscript in days or weeks, but build confidence through projects and feedback.
• Becoming job-ready takes 6-12 months, depending on background and target role.
📚 Create Callable Instances With Python's .call()
Do you know how to create custom classes in Python that can be called like functions? 🤔
A callable instance is an object that can be executed using parentheses with optional arguments. Examples include functions, methods, and even custom classes! 🌟 To create a callable instance, you need to add the
By understanding how to create and use callable instances, you'll become a more powerful Python developer. Tutorial
Do you know how to create custom classes in Python that can be called like functions? 🤔
A callable instance is an object that can be executed using parentheses with optional arguments. Examples include functions, methods, and even custom classes! 🌟 To create a callable instance, you need to add the
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- Stay informed with the latest Python updates and trends 👏.
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For those new to Python programming, staying up-to-date with the latest news and trends can be overwhelming. Here's a concise summary of recent Python news:
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- Check out Harvard's publicly available ML textbook on their GitHub repository 📊.
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- Stay informed with the latest Python updates and trends 👏.
🔬 Python State Machine Simulator and Visualizer: A Powerful Tool for Complex Systems 🤖
Learn how to create a state machine simulator in Python that visualizes complex systems, automating testing and analysis.
• Create a custom state machine using Python classes and objects.
• Use visualization libraries like Matplotlib or Seaborn to display the state machine's behavior.
• Test and optimize your state machine with automated code reviews.
Check out this example code: 📝
Save it as
Learn how to create a state machine simulator in Python that visualizes complex systems, automating testing and analysis.
• Create a custom state machine using Python classes and objects.
• Use visualization libraries like Matplotlib or Seaborn to display the state machine's behavior.
• Test and optimize your state machine with automated code reviews.
Check out this example code: 📝
import matplotlib.pyplot as plt
class StateMachine:
def __init__(self):
self.states = {}
def add_state(self, name, function):
self.states[name] = function
def update(self, current_state, input_value):
if current_state in self.states:
output_function = self.states[current_state](input_value)
print(f"{current_state} -> {output_function}")
Save it as
smac.py and run it to see the visualization: 📈❤3
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Singleton via new: One object rules all👑
When you have five loggers, three configurations, and two connections to the same database in your code - this is not architecture, but a communal apartment. Singleton solves: one object, no copies.
1️⃣ What's the point
Singleton guarantees that the class will have only one instance. All "new" calls simply return the already existing instance.
2️⃣ Practice
3️⃣ Why it's important
4️⃣ Nuances
🧠 Tip: implement Singleton as a metaclass or via a decorator - it'll be prettier and more flexible.
Useful?
❤️ - Yes
👍 - I already use it
👩💻 @DataScienceQ
When you have five loggers, three configurations, and two connections to the same database in your code - this is not architecture, but a communal apartment. Singleton solves: one object, no copies.
Singleton guarantees that the class will have only one instance. All "new" calls simply return the already existing instance.
class Singleton:
_instance = None
def __new__(cls, *args, **kwargs):
if not cls._instance:
print("Creating the first and last instance 🧱")
cls._instance = super().__new__(cls)
return cls._instance
# Check it out
a = Singleton()
b = Singleton()
print(a is b) # True
💠 Common access to resources (DB, logger, config)💠 Control of the system state💠 Minimum overhead
➡️ Thread safety - add locking if there's multithreading➡️ Don't overdo it - too many singletons = hidden dependencies➡️ Sometimes it's better to use DI (dependency injection)
Useful?
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How is the architecture of brokers in Kafka structured?
Answer:
Data is always written to the leader, which then asynchronously replicates it to the followers. If the leader fails, Kafka automatically selects a new one from the ISR. This ensures fault tolerance, although there may be a brief delay in service when the leader changes.
tags: #interview
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What are the main principles of writing unit tests?
Answer:
A good unit test reads like a specification: a clear name, minimal unnecessary preparation, a clear reason for failure. It should be fast and not access the network, database, or file system. If a dependency is unavoidable, it is replaced with a stub or mocks, checking either the result or the interaction contract, but not both at once unnecessarily.
tags: #interview
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