format 相对于比%s 使用更简洁明了，少些啰嗦
info =(
f"------------ info if {name} -------- "
f"name = {name} "
f"age = {age} "
f"hometown = {hometown} "
f"---------------- end---------------- ")
info ="""
------------ info if %s --------
name = %s
age = %s
hometown = %s
---------------- end----------------
""" % (name, name, age, hometown)