peter-cullen-burbery-python-functions 1.1.0

Utility functions by Peter Cullen Burbery, including date_time_stamp, compare_images, convert_blob_to_raw_github_url, validate_Windows_filename_with_reasons, and valid_Windows_filename

peter_cullen_burbery_python_functions

A utility package by Peter Cullen Burbery offering high-precision date/time formatting, image comparison tools, and system management helpers.

📚 Documentation: Read the Docs (auto-generated via Sphinx)

✨ Features

📅 date_time_functions

• date_time_stamp()

  Returns a precise timestamp string including:

  • Gregorian calendar date
  • Time with nanosecond precision
  • IANA time zone
  • ISO week format (e.g., 2025-W030-005)
  • Ordinal day of the year

Example:

2025-007-025 015.005.004.990819700 America/New_York 2025-W030-005 2025-206

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🖼️ image_functions

• compare_images(image_path_1, image_path_2)

  Compares two images using:

  • 🔐 SHA-256 hash
  • 🧮 Pixel-wise difference via ImageChops
  • 📏 Structural Similarity Index (SSIM)
  • 📊 ImageMagick absolute error metric (if available)

Outputs:

• Matching/difference status
• SSIM score
• Optional diff image (if images differ)

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🛠️ system_management_functions

• convert_blob_to_raw_github_url(blob_url: str)

  Converts a GitHub blob URL to a raw content URL.

  Example:

  from peter_cullen_burbery_python_functions.system_management_functions import convert_blob_to_raw_github_url
  
  raw_url = convert_blob_to_raw_github_url("https://github.com/user/repo/blob/main/script.ps1")
  print(raw_url)
  # Output: https://github.com/user/repo/raw/main/script.ps1
  

• validate_Windows_filename_with_reasons(name: str)

  Validates a Windows filename against Microsoft’s rules for illegal characters, reserved device names, and invalid trailing characters.

  Returns a dictionary indicating whether the filename is valid, and if not, why.

  Example:

  from peter_cullen_burbery_python_functions.system_management_functions import validate_Windows_filename_with_reasons
  
  result = validate_Windows_filename_with_reasons("CON.txt")
  print(result)
  # Output: {'valid': False, 'problems': [{'character': 'CON', 'reason': 'Reserved device name: console'}]}
  

• valid_Windows_filename(name: str)

  Lightweight check to determine whether a Windows filename is valid.

  Returns a simple boolean (True or False) based on the same rules used in validate_Windows_filename_with_reasons().

  Example:

  from peter_cullen_burbery_python_functions.system_management_functions import valid_Windows_filename
  
  print(valid_Windows_filename("normal_file.txt"))  # True
  print(valid_Windows_filename("NUL.txt"))          # False
  

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📦 Installation

pip install peter-cullen-burbery-python-functions

🧪 Example Usage

from peter_cullen_burbery_python_functions.date_time_functions import date_time_stamp
from peter_cullen_burbery_python_functions.image_functions import compare_images
from peter_cullen_burbery_python_functions.system_management_functions import (
    convert_blob_to_raw_github_url,
    validate_Windows_filename_with_reasons,
    valid_Windows_filename,
)

print("🕒 Timestamp:", date_time_stamp())
compare_images("image1.png", "image2.png")

url = "https://github.com/user/repo/blob/main/example.txt"
print("🔗 Raw URL:", convert_blob_to_raw_github_url(url))

filename = "COM1.txt"
print("📁 Validity with reasons:", validate_Windows_filename_with_reasons(filename))
print("✅ Is valid?", valid_Windows_filename(filename))

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📘 Documentation

This package uses Sphinx and the sphinx_rtd_theme to build documentation.

To build docs locally:

cd docs
make html

The output will be in docs/build/html.

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🧑‍💻 Author

Peter Cullen Burbery

This utility library is part of a broader collection of tools for automation, data processing, and system utility scripting.