如何从循环中访问 range() 函数中的参数值？

Question

我想从 for 循环中访问 range() 函数的参数值。我目前有以下工作代码：

import inflect

start = 0
stop = 5
step = 2

o = inflect.engine()

for i in range(start, stop, step):
    print(f"{i} is the {o.number_to_words(o.ordinal((i + step) // step))} "
          f"value when counting from {start} to {stop} by {step}")

产生以下所需的输出：

0 is the first value when counting from 0 to 5 by 2
2 is the second value when counting from 0 to 5 by 2
4 is the third value when counting from 0 to 5 by 2

我想要一种无需先定义start、stop 和step 即可生成相同输出的方法。我设想的解决方案类似于：

import inflect

o = inflect.engine()

for i in range(0, 5, 2):
    start = range.getparameters[0]
    stop = range.getparameters[1]
    step = range.getparameters[2]

    print(f"{i} is the {o.number_to_words(o.ordinal((i + step) // step))} "
          f"value when counting from {start} to {stop} by {step}")

Answer 1

字段与参数同名：

r = range(1, 10, 2)
print(r.start, r.stop, r.step)

请注意，这需要在 for 循环之前将范围分配给变量。或者，如果您使用的是 Python 3.8，则可以使用赋值表达式。