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SHA-256 Hash Generation import hashlib # Initialize and update with byte string sha_hasher1 = hashlib.sha256() sha_hasher1.update(b'input_data') output1 = sha_hasher1.hexdigest() # Initialize and update with encoded string sha_hasher2 = hashlib.sha256() sha_hasher2.update('input_data'.encode('utf-8')) output2 = sha_hasher2.hexdigest() # Incr ...

This article explores two primary approaches for interacting with MySQL databases using Python: the low-level driver PyMySQL and the high-level ORM framework SQLAlchemy. PyMySQL PyMySQL is a pure-Python MySQL client library. Its API closely resembles that of MySQLdb, making it a straightforward tool for executing raw SQL. Installation: pip3 ins ...

Name Resolution Order # Avoid naming your modules the same as built-in Python modules Python searches for names in this sequence: Local scope (memory) Built-in modules Paths in sys.path import sys print(sys.path) If a module cannot be found, there are two solutions: # Solution 1: Append the module path to sys.path import sys sys.path.append ...

Class ↔ Table, an object instance ↔ a row, an object attribute ↔ a column value, object.attribute ↔ field Store an object → dict → JSON → MySQL MySQL → JSON → dict → reconstruct object Convert all attribute names and values of an object into keys and values of a dictionary Serialize the mapping dictionary into JSON format Encode the JSON dat ...

Standard Streamlit Implementation The following snippet demonstrates the traditional top-down approach used in Streamlit to display key performance indicators and a bar chart for ambulance handover data. The layout is defined by columns, and data is filtered based on a selected hospital. col1, col2, col3, col4, col5 = st.columns((1,1,1,1,1)) m ...

Applying ANSI Escape Sequences on Unix-like SystemsTerminal text styling on Linux and macOS relies on ANSI escape sequences. These sequences begin with an ESC character (represented as \033 or \x1b) followed by display parameters and ending with m. The format is \033[mode;foreground;backgroundm.ForegroundBackgroundColorDisplay ModeEffect3040Bla ...

Python Modules Definition In Python, a .py file is referred to as a module. Categories There are four main categories of modules that can be imported: Built-in standard modules (also known as standard library). Execute help('modules') to see all built-in modules. Third-party open-source modules, which can be installed via pip install <modul ...

The @property decorator in Python transforms a class method into a attribute-like interface. This allows methods to be accessed without invoking parentheses, while also enabling the creation of read-only or computed class attributes. Accessing Methods as Attributes Applying the @property decorator to a method permits its retrieval using attribu ...

File Operations in Python Objective This exercise demonstrates fundamental file handling techniques using Python's built-in modules and standard libraries. Task Descriptions 1. Listing Directory Contents Create a script that prompts the user for a directory path and displays all items within it. import os directory = input("Enter director ...

The pickle module provides functionality for serializing and deserializing Python object hierarchies. Serialization converts Python objects into a byte stream that can be saved to disk, while deseiralization rceonstructs the original objects from stored data. This mechanism enables permanent storage of complex data structures across program exe ...