Explain Default tagging with proper implementation in Python.

Default tagging is the simplest and basic step for POS tagging. When the most common parts of speech are need to be evaluated in a sentence, then default tagging is used. Basically, it considers a tag as a single argument.

For implementation, DefaultTagger is used in Python using nltk.

Here, both ‘Hello’ and ‘world’ are tagged as ‘NN’ which means both are singular nouns.