Python Lore

Creating CGI HTTP Server with http.server.CGIHTTPRequestHandler

A simple to-do list web app with a Python and Flask server backend. The server provides GET and POST API endpoints for managing items with JSON. The front-end uses vanilla JavaScript with fetch and async/await to dynamically update the DOM and perform optimistic updates for a fast UI.

Python modules TensorFlow

Implementing Convolutional Neural Networks with tf.keras.layers.Conv2D

Python modules, TensorFlowConvolutional Neural Networks, tf.keras.layers.Conv2D

Keras Conv2D parameters for optimal CNN performance. Analysis of kernel_size, filters, padding, and BatchNormalization. Also covers efficient SeparableConv2D layers and kernel_regularizer to combat overfitting. This approach improves accuracy, speed, and training stability in your network.

Python modules SciPy

Clustering and Spatial Analysis with scipy.cluster

Python modules, SciPyClustering, scipy.cluster

Hierarchical clustering limits on large datasets due to O(n²) complexity. K-means scales better, especially with subsampling or scikit-learn’s MiniBatchKMeans for faster clustering. Memory optimization via float32 reduces footprint. Distributed computing with Dask enables large-scale spatial data processing.

Pandas Python modules

Exploring pandas.DataFrame.memory_usage for Memory Optimization

Pandas, Python modulesMemory Optimization, pandas.DataFrame.memory_usage

Python performance and memory profiling for Pandas data optimization. Use cProfile to find bottlenecks and memory_profiler for line-by-line memory analysis. The most efficient method is specifying dtypes in pd.read_csv during initial data loading to avoid memory spikes.

Pillow (PIL Fork) Python modules

Integrating Pillow with GUI Frameworks for Image Display

Pillow (PIL Fork), Python modulesGUI Frameworks, Image Display

A PyQt custom widget for a performant, pannable, zoomable image viewer. Manage view state with pan offset and zoom factor. Use QPainter in paintEvent for efficient, GPU-accelerated rendering of high-resolution QPixmap objects without blocking event handlers like mouseMoveEvent or wheelEvent.

Flask Python modules

File Upload Handling in Flask

Flask, Python modulesFile Uploads, Flask

Flask secure file serving for files stored outside the web root. Use the send_from_directory function to create a secure endpoint, add authorization, prevent directory traversal, and stream files. Force downloads using as_attachment=True and specify a custom attachment_filename.

json Python modules

Customizing JSON Encoding with json.JSONEncoder

json, Python modulesCustom Encoding, json.JSONEncoder

Custom JSONEncoder subclassing for flexible serialization of complex Python objects like custom classes and datetime. Override default() to convert objects to JSON-serializable formats, enabling centralized, reusable encoding logic for json.dumps with support for multiple types including Complex and datetime.

$Using math.ldexp to Calculate x * (2**i)$

math Python modules

Using math.ldexp to Calculate x * (2**i)

math, Python modulesExponentiation, math.ldexp, Multiplication

Floating-point normalization using math.ldexp and math.frexp enables efficient scaling by powers of two, reducing overflow risk and rounding errors. Applications include dataset normalization, constructing subnormal and large floats for testing, and optimized vector scaling in numerical algorithms and simulations.

Python modules Requests

Working with JSON Data and Requests

Python modules, RequestsJSON Data, Requests

Python dictionary data access using keys for simple or nested data. A KeyError occurs with missing keys. The get() method provides robust, safe access, returning None or a default value. This creates resilient code for parsing inconsistent API JSON data.

datetime Python modules

Parsing Date Strings with datetime.datetime.strptime

datetime, Python modulesDate Parsing, datetime.strptime

Master strptime function for parsing diverse date formats in Python. Understand format codes like %B for full month names, %A for weekdays, and %z for timezone offsets. Utilize dateutil library for complex date strings without format strings. Efficiently handle timezone-aware datetime objects and avoid common parsing pitfalls.

Python Lore

Creating CGI HTTP Server with http.server.CGIHTTPRequestHandler

Implementing Convolutional Neural Networks with tf.keras.layers.Conv2D

Clustering and Spatial Analysis with scipy.cluster

Exploring pandas.DataFrame.memory_usage for Memory Optimization

Integrating Pillow with GUI Frameworks for Image Display

File Upload Handling in Flask

Customizing JSON Encoding with json.JSONEncoder

Using math.ldexp to Calculate x * (2**i)

Working with JSON Data and Requests

Parsing Date Strings with datetime.datetime.strptime

Deep Learning with Python

Introduction to GIS Programming

Python Programming for Beginners

Murach’s Python Programming