format rule python code code example

Example 1: python string format

string_a = "Hello"
string_b = "Cena"

# Index based:
print("{0}, John {1}"
      .format(string_a, string_b))
# Object based:
print("{greeting}, John {last_name}"
      .format(greeting=string_a, last_name=string_b))

Example 2: python code style

This python pep sums it up: https://www.python.org/dev/peps/pep-0008/