{{{c
a="hello"
b="world"
answer="42"
pi="3.141592654"
now=datetime.datetime.now()

f"{a} {b}"           # hello world
f"{answer:04d}"      # 0042
f"{pi:5.3f}"         # 3.142

f"{a=}"              # a=hello

f"{now=%Y-%m-%d}"    # now=2021-06-19

f"{a!r}"             == f"{repr(a)}"
f"{a!s}"             == f"{str(a)}"
f"{a!a}"             == f"{ascii(a)}"
f"{'—☺'!a}"          # "'\\u2014\\u263a'"
}}}%TIME=1624132602