19th November 2021

Coding⚑

Python⚑

asyncio⚑

• New: Limit concurrency.

  Use asyncio.Semaphore.

  sem = asyncio.Semaphore(10)
  async with sem:
      # work with shared resource
  

Python Snippets⚑

• New: Remove a substring from the end of a string.

  On Python 3.9 and newer you can use the removeprefix and removesuffix methods to remove an entire substring from either side of the string:

  url = 'abcdc.com'
  url.removesuffix('.com')    # Returns 'abcdc'
  url.removeprefix('abcdc.')  # Returns 'com'
  

  On Python 3.8 and older you can use endswith and slicing:

  url = 'abcdc.com'
  if url.endswith('.com'):
      url = url[:-4]
  

Pydantic⚑

• New: Field customization.

  Optionally, the Field function can be used to provide extra information about the field and validations. Such as the title, default, description and many others

Tenacity⚑

• New: Introduce the Tenacity python library.

  Tenacity is an Apache 2.0 licensed general-purpose retrying library, written in Python, to simplify the task of adding retry behavior to just about anything.