On , I learnt ...
Python 3.7 supports postponed evaluation of annotations
For example, instead of:
import _csv
def generate_report(writer: '_csv._writer'):
pass
you can use:
from __future__ import annotations
import _csv
def generate_report(writer: _csv._writer):
pass
and avoid using a string literal for the type annotation.
This follows on from a related TIL about how to specify type annotations for
the csv
module.
Related: