🐍 Python Development Tips: Introducing Pydantic 🚀
Pydantic is a powerful library that brings structure and type checking to your Python code. It allows you to define data schemas using plain Python classes with annotations, making it easier to validate and parse incoming data. Here's a basic example to give you a taste of what Pydantic can do
The real power of Pydantic lies in its ability to handle complex validations, default values, and serialization/deserialization of data. You can define optional fields, perform complex validation logic, and even nest models within each other.
For a more comprehensive understanding of Pydantic and its advanced features, I highly recommend checking out this tutorial on YouTube: Pydantic Tutorial. and Pydantic Documents
I will be covering numerous posts about Pydantic in the future because it is an Perfect library. Happy coding! 🎉
#python
#pydantic
@Pythonic_Dev
Pydantic is a powerful library that brings structure and type checking to your Python code. It allows you to define data schemas using plain Python classes with annotations, making it easier to validate and parse incoming data. Here's a basic example to give you a taste of what Pydantic can do
The real power of Pydantic lies in its ability to handle complex validations, default values, and serialization/deserialization of data. You can define optional fields, perform complex validation logic, and even nest models within each other.
For a more comprehensive understanding of Pydantic and its advanced features, I highly recommend checking out this tutorial on YouTube: Pydantic Tutorial. and Pydantic Documents
I will be covering numerous posts about Pydantic in the future because it is an Perfect library. Happy coding! 🎉
#python
#pydantic
@Pythonic_Dev
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the proper time to review code for security gaps is once the architecture behind the code commit has been properly reviewed
this means code reviews should be the second step in an organization that follows secure development best practice
this has two benefits the first and most obvious benefit is that of security but having an additional reviewer who typically is viewing the code from outside the immediate development team has its own merits as well
As is such the code security reviewer phase is vital for both application functionality as well as application security.
code security reviewers should be implemented as an additional step in organization that only have a functional reviews.
Doing so will dramatically reduced the number of high impact security bugs that would otherwise be released into a production environment
#security
Source: Web Application Security Book
@Pythonic_Dev
this means code reviews should be the second step in an organization that follows secure development best practice
this has two benefits the first and most obvious benefit is that of security but having an additional reviewer who typically is viewing the code from outside the immediate development team has its own merits as well
As is such the code security reviewer phase is vital for both application functionality as well as application security.
code security reviewers should be implemented as an additional step in organization that only have a functional reviews.
Doing so will dramatically reduced the number of high impact security bugs that would otherwise be released into a production environment
#security
Source: Web Application Security Book
@Pythonic_Dev
Pythonic Dev
🐍 Python Development Tips: Shallow Copy 🐍 🔍 What is Shallow Copy? When working with objects in Python, copying an object usually involves creating a new object with the same values as the original. Shallow copy is one such technique where a new object is…
Real Use Case of Shallow Copy
The disconnect method in the manager removes the WebSocket object from active_connections. I need the WebSocket objects in active_connections because I want to disconnect all websockets. However, I can't iterate through active_connections directly because its size will change during the iteration operation. Therefore, I need the objects but don't require the active_connections sequence. To achieve this, I use the .copy() method, which returns a shallow copy of the active_connections set.
@Pythonic_Dev
The disconnect method in the manager removes the WebSocket object from active_connections. I need the WebSocket objects in active_connections because I want to disconnect all websockets. However, I can't iterate through active_connections directly because its size will change during the iteration operation. Therefore, I need the objects but don't require the active_connections sequence. To achieve this, I use the .copy() method, which returns a shallow copy of the active_connections set.
@Pythonic_Dev
🐍📢 Hey Python enthusiasts! let's dive into the power of iterators in Python. 🚀
So, what exactly is an iterator? In simple terms, an iterator is an object that can be iterated (looped) over. It represents a stream of data that can be fetched one element at a time, without loading the entire dataset into memory at once.
Look at photo. Consider the task of reading a file, "test.txt," and printing its contents in chunks of 12 characters
in second code, we define a lambda function called method that reads 12 characters from the file each time it's called. By passing this function along with an empty string ("") to iter, we create an iterator that keeps fetching data until an empty string is encountered. The loop then iterates over the iterator, printing each chunk of data.
Using iter with a callable function provides a cleaner and more concise alternative to the while loop. It encapsulates the logic of reading chunks inside method, making our code more readable and maintainable.
Happy coding! 🎉💻
So, what exactly is an iterator? In simple terms, an iterator is an object that can be iterated (looped) over. It represents a stream of data that can be fetched one element at a time, without loading the entire dataset into memory at once.
Look at photo. Consider the task of reading a file, "test.txt," and printing its contents in chunks of 12 characters
in second code, we define a lambda function called method that reads 12 characters from the file each time it's called. By passing this function along with an empty string ("") to iter, we create an iterator that keeps fetching data until an empty string is encountered. The loop then iterates over the iterator, printing each chunk of data.
Using iter with a callable function provides a cleaner and more concise alternative to the while loop. It encapsulates the logic of reading chunks inside method, making our code more readable and maintainable.
Happy coding! 🎉💻
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📢 Hey Pythonistas! 🐍👩💻
Let's dive into the world of tuple unpacking in Python today! 🎉
Tuple unpacking is a powerful feature that allows you assign multiple variables at once from a tuple. It provides a concise and efficient way to extract values from tuples, making your code more readable and expressive.
Happy coding! 💻
#Python
@Pythonic_Dev
Let's dive into the world of tuple unpacking in Python today! 🎉
Tuple unpacking is a powerful feature that allows you assign multiple variables at once from a tuple. It provides a concise and efficient way to extract values from tuples, making your code more readable and expressive.
Happy coding! 💻
#Python
@Pythonic_Dev
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Pythonic Dev
What is the Output of code?
Most people who choose option 3 have a higher level of accuracy compared to those who choose option 2. I doubt that most people have chosen option 2 because of the right-hand side evaluation. 😁😂
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Pythonic Dev
#Quizz #very_easy @Pythonic_Dev
🔍 Python Code Analysis: Understanding the Output
In the first line, we assign the value 1 to the variable a. Moving on to the second line, we encounter a multiple assignment statement. This statement allows us to assign values to multiple variables simultaneously.
In this case, we have a, b = a+1, a+2. Let's break it down step step:
The expression a+1 evaluates to 2 because a currently holds the value 1.
The expression a+2 evaluates to 3 using the same logic as above.
Now, the assignment takes place. Since Python evaluates the right-hand side of the assignment before assigning the values to the variables on the left-hand side, the following happens:
The value 2 is assigned to a.
The value 3 is assigned to b.
Finally, we reach the print(a, b) statement. At this point, a holds the value 2, and b holds the value 3. Therefore, when we print a and b, the output will be:
2 , 3
📢 Important Python Tip! 🐍
When using assignment expressions in Python, remember that the right-hand side the expression is evaluated completely before the assignment takes place. This means that any calculations or operations on the right side are performed first, and then the result is assigned to the variable on the left side.
@Pythonic_Dev
In the first line, we assign the value 1 to the variable a. Moving on to the second line, we encounter a multiple assignment statement. This statement allows us to assign values to multiple variables simultaneously.
In this case, we have a, b = a+1, a+2. Let's break it down step step:
The expression a+1 evaluates to 2 because a currently holds the value 1.
The expression a+2 evaluates to 3 using the same logic as above.
Now, the assignment takes place. Since Python evaluates the right-hand side of the assignment before assigning the values to the variables on the left-hand side, the following happens:
The value 2 is assigned to a.
The value 3 is assigned to b.
Finally, we reach the print(a, b) statement. At this point, a holds the value 2, and b holds the value 3. Therefore, when we print a and b, the output will be:
2 , 3
📢 Important Python Tip! 🐍
When using assignment expressions in Python, remember that the right-hand side the expression is evaluated completely before the assignment takes place. This means that any calculations or operations on the right side are performed first, and then the result is assigned to the variable on the left side.
@Pythonic_Dev
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🔍 What is namedtuple?
namedtuple is a built Python module that allows you to create lightweight, immutable data structures. It combines the simplicity of tuples with the accessibility of dictionaries, providing named fields for easy access.
🌟 Benefits of namedtuple:
1️⃣ Conc Syntax: With namedtuple, you can define a new class with named fields in just one line of code
2️⃣ Readability: By assigning names to fields, your code becomes self-explanatory, enhancing its readability and reducing the chances of errors.
3️⃣ Memory Efficiency: namedtuple objects are memory-efficient as they do not store attributes in a per-instance dict.
4️⃣ Immutable Nature: Once created, namedtuple instances cannot be modified, ensuring data integrity.
💡 Pro Tip:
You can also convert
Happy coding! 🚀
YouTube Video
#Python
@Pythonic_Dev
namedtuple is a built Python module that allows you to create lightweight, immutable data structures. It combines the simplicity of tuples with the accessibility of dictionaries, providing named fields for easy access.
🌟 Benefits of namedtuple:
1️⃣ Conc Syntax: With namedtuple, you can define a new class with named fields in just one line of code
2️⃣ Readability: By assigning names to fields, your code becomes self-explanatory, enhancing its readability and reducing the chances of errors.
3️⃣ Memory Efficiency: namedtuple objects are memory-efficient as they do not store attributes in a per-instance dict.
4️⃣ Immutable Nature: Once created, namedtuple instances cannot be modified, ensuring data integrity.
💡 Pro Tip:
You can also convert
namedtuple instances to dictionaries using the _asdict() method, making it easier to work with other Python data structures.Happy coding! 🚀
YouTube Video
#Python
@Pythonic_Dev
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Forwarded from Python BackendHub
یک نکته که عرفان اشاره کرده:
مثلا من گاهی واقعا میبینم بچه ها over engineering میکنن که یه چیزو در optimize ترین حالت ممکن بنویسن یا فلان چیز یه وقت سربار نداشته باشه در صورتی که فراموش میکنن اصلا اصل ایده شون کار میکنه ؟
این زمانی که میذارن ارزش داره تا اگه یه زمانی ۱۰ هزار یوزر اومد تو سایت (تجربه نشون داده این اگه ها معمولا اتفاق نمیوفتن) داون نشه ؟
مثل یه جور وسواسه بین برنامه نویسا که باعث میشه واقعا غرق چیزی بشن که اون لحظه لازم نیست و نیاز نیست. قبول دارم چیزی به اسم technical debt وجود داره ولی این از اون سر بوم افتادنه که همیشه باید مراقبش باشیم.
دقیقا. کاملا درسته بنظرم.
نداشتن technical debt باعث شکست استارت آپ میشه (چون خیلی وسواس الکی به خرج دادن)
و زیاد داشتنش هم بعد از مدت کوتاهی باعث شکستش میشه (چون اصلا وسواس به خرج ندادن)
خوبه همیشه تکنیکال دبت داشت. فقط باید حدشو رعایت کرد.
@ManifoldsPython
مثلا من گاهی واقعا میبینم بچه ها over engineering میکنن که یه چیزو در optimize ترین حالت ممکن بنویسن یا فلان چیز یه وقت سربار نداشته باشه در صورتی که فراموش میکنن اصلا اصل ایده شون کار میکنه ؟
این زمانی که میذارن ارزش داره تا اگه یه زمانی ۱۰ هزار یوزر اومد تو سایت (تجربه نشون داده این اگه ها معمولا اتفاق نمیوفتن) داون نشه ؟
مثل یه جور وسواسه بین برنامه نویسا که باعث میشه واقعا غرق چیزی بشن که اون لحظه لازم نیست و نیاز نیست. قبول دارم چیزی به اسم technical debt وجود داره ولی این از اون سر بوم افتادنه که همیشه باید مراقبش باشیم.
دقیقا. کاملا درسته بنظرم.
نداشتن technical debt باعث شکست استارت آپ میشه (چون خیلی وسواس الکی به خرج دادن)
و زیاد داشتنش هم بعد از مدت کوتاهی باعث شکستش میشه (چون اصلا وسواس به خرج ندادن)
خوبه همیشه تکنیکال دبت داشت. فقط باید حدشو رعایت کرد.
@ManifoldsPython
What is the abs() method in Python?
The abs() method in Python returns the absolute value of a number. The absolute value of a number is its distance from zero. For example, the absolute value of -5 is 5, and the absolute value of 10 is 10.
Conclusion
The abs() method is a useful built-in method in Python that can be used to get the absolute value of a number. The absolute value of a number is its distance from zero. For example, the absolute value of -5 is 5, and the absolute value of 10 is 10.
#python
@Pythonic_Dev
The abs() method in Python returns the absolute value of a number. The absolute value of a number is its distance from zero. For example, the absolute value of -5 is 5, and the absolute value of 10 is 10.
Conclusion
The abs() method is a useful built-in method in Python that can be used to get the absolute value of a number. The absolute value of a number is its distance from zero. For example, the absolute value of -5 is 5, and the absolute value of 10 is 10.
#python
@Pythonic_Dev
The operator module in Python 🔢
The operator module in Python provides a set of functions that correspond to the standard operators. These functions can be used to perform mathematical, relational, logical, and bitwise operations on two input numbers.
Why use the operator module? 🤔
The operator module can be useful for a variety of reasons. For example, it can be used to:
Write more concise and readable code 📝
Avoid using the cumbersome syntax for some operators ⌨️
Extend the functionality of the standard operators 🛠️
The operator module in Python provides a set of functions that correspond to the standard operators. These functions can be used to perform mathematical, relational, logical, and bitwise operations on two input numbers.
Why use the operator module? 🤔
The operator module can be useful for a variety of reasons. For example, it can be used to:
Write more concise and readable code 📝
Avoid using the cumbersome syntax for some operators ⌨️
Extend the functionality of the standard operators 🛠️
📢 Hey Pythonistas! 🐍
Today, let's dive into the powerful sorted() method in Python
The sorted() method is used to sort iterables such as lists, tuples, and even strings. It takes an iterable as its argument and returns a new sorted list containing the elements from the original iterable.
The sorted() method also accepts additional parameters to customize the sorting behavior. One such parameter is reverse
Furthermore, the sorted() method can handle more complex scenarios by utilizing the key parameter. This parameter allows us to specify a function that generates a value for each element, based on which the sorting is performed.
Remember, If you want to sort the original list in-place, you can use the sort() method instead.
Happy coding! 💻✨
#python
@Pythonic_Dev
Today, let's dive into the powerful sorted() method in Python
The sorted() method is used to sort iterables such as lists, tuples, and even strings. It takes an iterable as its argument and returns a new sorted list containing the elements from the original iterable.
The sorted() method also accepts additional parameters to customize the sorting behavior. One such parameter is reverse
Furthermore, the sorted() method can handle more complex scenarios by utilizing the key parameter. This parameter allows us to specify a function that generates a value for each element, based on which the sorting is performed.
Remember, If you want to sort the original list in-place, you can use the sort() method instead.
Happy coding! 💻✨
#python
@Pythonic_Dev
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🐍 Python Tip: Understanding Sequence Types and Iterables 🔄
Hey fellow Pythonistas! Today, let's dive into an important concept: sequence types and iterables. It's crucial to understand that while all sequence types are iterables, not all iterables are sequence types. Let's break it down!
🔢 Sequence Types:
Sequence types in Python include strings, lists, tuples, and byte arrays. They represent a collection of elements in a specific order. Each element is assigned an index, allowing for easy access and manipulation. Sequences are iterable by nature, meaning we can iterate over their elements using loops comprehensions.
🔄 Iterables:
On the other hand, iterables are objects that can be looped over. They provide a way to access their elements one at a time. In addition to sequence types, other examples iterables in Python include sets, dictionaries, generators, and even files. Iterables allow us to use constructs like for loops to iterate through their contents.
💡 The Distinction:
The key distinction lies in the fact that all sequence types are iterables because they support iteration. However, not all iterables are sequence types. For instance, sets and dictionaries are iterables but do not maintain a specific order for their elements. Therefore, we cannot rely on indices to access elements in these cases.
🤔 Why Does It Matter?
Understanding this distinction is essential when choosing the appropriate data structure for your needs. If you require ordered elements with index-based access, sequence types like lists or tuples are the way go. On the other hand, if order doesn't matter or you need to associate values with keys, iterables like sets or dictionaries might more suitable.
So, remember: sequence types are a subset of iterables, but not all iterables are sequence types. Choose wisely based on your requirements!
Happy coding! 🚀✨
#Python
@Pythonic_Dev
Hey fellow Pythonistas! Today, let's dive into an important concept: sequence types and iterables. It's crucial to understand that while all sequence types are iterables, not all iterables are sequence types. Let's break it down!
🔢 Sequence Types:
Sequence types in Python include strings, lists, tuples, and byte arrays. They represent a collection of elements in a specific order. Each element is assigned an index, allowing for easy access and manipulation. Sequences are iterable by nature, meaning we can iterate over their elements using loops comprehensions.
🔄 Iterables:
On the other hand, iterables are objects that can be looped over. They provide a way to access their elements one at a time. In addition to sequence types, other examples iterables in Python include sets, dictionaries, generators, and even files. Iterables allow us to use constructs like for loops to iterate through their contents.
💡 The Distinction:
The key distinction lies in the fact that all sequence types are iterables because they support iteration. However, not all iterables are sequence types. For instance, sets and dictionaries are iterables but do not maintain a specific order for their elements. Therefore, we cannot rely on indices to access elements in these cases.
🤔 Why Does It Matter?
Understanding this distinction is essential when choosing the appropriate data structure for your needs. If you require ordered elements with index-based access, sequence types like lists or tuples are the way go. On the other hand, if order doesn't matter or you need to associate values with keys, iterables like sets or dictionaries might more suitable.
So, remember: sequence types are a subset of iterables, but not all iterables are sequence types. Choose wisely based on your requirements!
Happy coding! 🚀✨
#Python
@Pythonic_Dev
🐍 Python Tip: Understanding len and getitem 📚
Greetings, Python enthusiasts! Today, let's explore two special methods in Python that are often used when working with custom objects or classes:
1️⃣
2️⃣
These two methods,
By understanding and utilizing these methods effectively, we can enhance the usability and versatility of our custom classes. So, keep them in mind when designing your own Python objects!
Happy coding! 🚀💻
#Python
@Pythonic_Dev
Greetings, Python enthusiasts! Today, let's explore two special methods in Python that are often used when working with custom objects or classes:
__len__ and __getitem__.1️⃣
__len__: This method allows us to define the behavior of the built-in len() function when applied to an instance of our class. By implementing __len__, we can specify how many elements or items our object contains. It provides a convenient way to retrieve the length of our custom objects.2️⃣
__getitem__: This method enables us to implement indexing and slicing behavior for our objects. It allows us to access elements using square brackets (`[]`) and supports both single-item access and slicing. By implementing __getitem__, we can make our objects behave like built-in sequences such as lists or tuples.These two methods,
__len__ and __getitem__, provide powerful ways to customize the behavior of our objects and make them more intuitive to work with. They allow us to create classes that mimic the functionality of built-in data structures, providing a consistent and familiar interface to users.By understanding and utilizing these methods effectively, we can enhance the usability and versatility of our custom classes. So, keep them in mind when designing your own Python objects!
Happy coding! 🚀💻
#Python
@Pythonic_Dev
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📢 Exercise: Implement a Custom Immutable Sequence 🧩
Write a Python class that represents a custom immutable sequence. The sequence should follow an arithmetic pattern, where each term obtained by multiplying the position number (n) by 3 and then subtracting 1. 🔢
The class should have the following properties and methods:
Properties:
-
Methods:
-
-
-
Your task is to implement the
#Python
@Pythonic_Dev
Write a Python class that represents a custom immutable sequence. The sequence should follow an arithmetic pattern, where each term obtained by multiplying the position number (n) by 3 and then subtracting 1. 🔢
The class should have the following properties and methods:
Properties:
-
length: An integer representing the length of the sequence. 📏Methods:
-
init(self, length): Initializes the sequence with the specified length. 🎯-
len(self): Returns the length of the sequence. 🔢-
getitem(self, index): Returns the value at the given index in the sequence. 📌Your task is to implement the
CustomSequence class according to the specifications provided above. Test your implementation with different lengths and verify that the sequence follows the desired arithmetic pattern. ✅#Python
@Pythonic_Dev