I wanted to know if there are any real world examples of Chain Map? this would help me better understand the concept.
Hi Regina,
Thank you for reaching out! We are happy to hear from you.
As discussed in the lesson, ChainMap has the following properties:
- Links multiple mappings into a combined mapping
- Returns the first value that matches the given key
These properties come in very handy to solve real-life problems like:
- Searching through multiple dictionaries at once
- Updating multiple dictionaries simultaneously
- Setting up default values to manage command line configurations
- Prioritizing to use environment variables over command line arguments or application’s defaults
In addition to this, one of the most common real life cases could be mapping GET and POST arguments!
Hope this answers your question. 