Python 生成器：如何根据用户输入从两个不同的列表中生成对（要打印多少对）

Question

鉴于有两个列表：

colorList1 = ['red', 'orange', 'pink', 'brown', 'green', 'yellow']
colorList2 = ['purple', 'blue', 'violet', 'black, 'cyan', 'white']

如何根据用户输入的数字从每个列表（每行）生成和打印一种颜色，从列表的开头开始。而且，在用户按下 Enter 键之前，如何每次最多只生成 2 对颜色。

例子：

userinput = int(input("Enter a limit: "))  # user enters 5

输出：

red     purple
orange  blue       
press Enter key for next 2 pairs of colors     # user presses Enter key to generate the next pair
pink    violet
brown   black      
press Enter key for next 2 pairs of colors     # user presses Enter key to generate the next pair
green   cyan              # last pair since user entered 5
End of list of colors

Answer 1

你可以试试这样的。

colorList1 = ['red', 'orange', 'pink', 'brown', 'green', 'yellow']
colorList2 = ['purple', 'blue', 'violet', 'black', 'cyan', 'white']

def print_color():
    userInput = input("Enter amount to print: ")

    try:
       userInput = int(userInput)
    except ValueError:
        print("User Input must be a positive integer")
        return

    if userInput < 0:
        print("User Input must be a positive integer")
        return

    for i in range(0, int(userInput)):

        if i >= len(colorList1) or i >= len(colorList2):
            print("End of list of colors")
            return

        if i % 2 == 0 and i != 0:
            input("press Enter key for next 2 pairs of colors")

        print(colorList1[i], colorList2[i])

print_color()

编辑：我已更新代码以包含基本错误检查

Answer 2

你可以这样做：

colorList1 = ['red', 'orange', 'pink', 'brown', 'green', 'yellow']
colorList2 = ['purple', 'blue', 'violet', 'black', 'cyan', 'white']
color_pairs = iter(zip(colorList1,colorList2))
userinput = int(input("Enter a limit: "))  # user enters 5
i = 0
while i<userinput:
    if i%2 == 0: input(f"press Enter key for next 2 pairs of colors")
    print(*next(color_pairs))
    if i+1 == len(colorList1):
        break
    i += 1
print("\nEnd of list of colors")

输出：

Enter a limit: 5

press Enter key for next 2 pairs of colors
red purple
orange blue

press Enter key for next 2 pairs of colors
pink violet
brown black

press Enter key for next 2 pairs of colors
green cyan

End of list of colors

限制 = 7：

Enter a limit: 7

press Enter key for next 2 pairs of colors
red purple
orange blue

press Enter key for next 2 pairs of colors
pink violet
brown black

press Enter key for next 2 pairs of colors
green cyan
yellow white

End of list of colors