python - 每次循环通过时向用户更改提示

Question

如何创建一个提示输入项目列表的循环，每次提示都会更改。

例如“输入你的第一个项目”然后“输入你的第二个项目”等等......（或第一个，第二个）

我需要将所有项目添加到数组中：

items = []
for i in range(5):
    item = input("Input your first thing: ")
    items.append(item)
print (items)

Answer 1

使用提示列表：

prompts = ('first', 'second', 'third', 'fourth', 'fifth')

items = []
for prompt in prompts:
    item = input("Input your {} thing: ".format(prompt))
    items.append(item)

Answer 2

稍微改变你的代码：

names = {1: "first", 2: "second", 3: "third"    # and so on...
        }

items = []

for i in range(5):
    item = input("Input your {} thing: ".format(names[i+1])
    items.append(item)
print(items)

或更通用的版本：

def getordinal(n): if str(n)[-2:] in ("11","12","13"): return "{}th".format(n) elif str(n)[-1 ] == "1": 返回 "{}st".format(n) elif str(n)[-1] == "2": 返回 "{}nd".format(n) elif str(n)[ -1] == "3"：返回 "{}rd".format(n) 否则：返回 "{}th".format(n)

或者更简洁的定义：

def getord(n):
    s=str(n)
    return s+("th" if s[-2:] in ("11","12","13") else ((["st","nd","rd"]+
                                                        ["th" for i in range(7)])
                                                        [int(s[-1])-1]))

Answer 3

为什么不使用字符串格式？类似的东西

>>> for i in range(5):
        items.append(input("Enter item at position {}: ".format(i)))

Answer 4

from collections import OrderedDict

items = OrderedDict.fromkeys(['first', 'second', 'third', 'fourth', 'fifth'])

for item in items:
    items[item] = raw_input("Input your {} item: ".format(item))


print items

输出：

Input your first item: foo
Input your second item: bar
Input your third item: baz
Input your fourth item: python
Input your fifth item: rocks

OrderedDict([('first', 'foo'), ('second', 'bar'), ('third', 'baz'), ('fourth', 'python'), ('fifth', 'rocks')])