Which of the expressions is not valid in python?

Question

True

While False:
break

x = ‘129 * 5’ + ‘3x-seventeen’

when 3 > 1: print (“foo”)

Answer 1

there is no 'when' keyword in python
https://docs.python.org/3.7/reference/lexical_analysis.html#keywords
https://docs.python.org/3/genindex-all.html#W

you can use if instead