Question

我正在编写我的代码，然后按照Tony Gaddis的书“Begin Out with Python：Second Edition”获取我在MCC的COMS-170，出于某些原因我不断收到错误

Traceback (most recent call last):
File "C:/Users/tcarroll/Desktop/123.py", line 36, in <module> 
     main()
TypeError: main() missing 1 required positional argument: 'nums8'

这是我的代码：

def main(nums8):
    inFile = open('nums8.txt', 'r')

num1 = int(inFile.readline())
num2 = int(inFile.readline())
num3 = int(inFile.readline())
num4 = int(inFile.readline())
num5 = int(inFile.readline())
num6 = int(inFile.readline())
num7 = int(inFile.readline())
num8 = int(inFile.readline())
num9 = int(inFile.readline())
num10 = int(inFile.readline())
num11 = int(inFile.readline())
num12 = int(inFile.readline())
num13 = int(inFile.readline())
num14 = int(inFile.readline())
num15 = int(inFile.readline())
num16 = int(inFile.readline())
num17 = int(inFile.readline())
num18 = int(inFile.readline())
num19 = int(inFile.readline())
num20 = int(inFile.readline())
num21 = int(inFile.readline())
num22 = int(inFile.readline())

inFile.close()

total = int(num1 + num2 + num3 + num4 + num5 + num6 + num7 + num8 + num9 + num10 + num11 + num12 + num13 + num14 + num15 + num16 + num17 + num18 + num19 + num20 + num21 + num22)

print('The numbers are: ', num1, num2, num3, num4, num5, num6, num7, num8, num9, num10, num11, num12, num13, num14, num15, num16, num17, num18, num19, num20, num21, num22)
print('Their total is: ', total)
main()

书中的问题是： 5.数字之和假设包含一系列整数的文件名为numbers.txt（对于此分配，我们实际上有一个我们下载和使用的文件）并存在于计算机的磁盘上。编写一个程序，读取存储在文件中的所有数字并计算它们的总数。

Answer 1

只需在没有参数的情况下定义主函数：

def main():
    inFile = open('nums8.txt', 'r')

此外，您还希望将文件读取代码放入此功能中：

def main(nums8):
    inFile = open('nums8.txt', 'r')
    num1 = int(inFile.readline())
    num2 = int(inFile.readline())
    num3 = int(inFile.readline())
    num4 = int(inFile.readline())
    num5 = int(inFile.readline())
    num6 = int(inFile.readline())
    num7 = int(inFile.readline())
    num8 = int(inFile.readline())
    num9 = int(inFile.readline())
    num10 = int(inFile.readline())
    num11 = int(inFile.readline())
    num12 = int(inFile.readline())
    num13 = int(inFile.readline())
    num14 = int(inFile.readline())
    num15 = int(inFile.readline())
    num16 = int(inFile.readline())
    num17 = int(inFile.readline())
    num18 = int(inFile.readline())
    num19 = int(inFile.readline())
    num20 = int(inFile.readline())
    num21 = int(inFile.readline())
    num22 = int(inFile.readline())

    inFile.close()

    total = int(num1 + num2 + num3 + num4 + num5 + num6 + num7 + num8 + num9 + num10 + num11 + num12 + num13 + num14 + num15 + num16 + num17 + num18 + num19 + num20 + num21 + num22)

    print('The numbers are: ', num1, num2, num3, num4, num5, num6, num7, num8, num9, num10, num11, num12, num13, num14, num15, num16, num17, num18, num19, num20, num21, num22)
    print('Their total is: ', total)

main()

另外，您可能希望将其写得更短：

def main():

    with open('nums8.txt') as inFile:
        nums = [int(line) for line in inFile]
    total = sum(nums)
    print('The numbers are: ', nums)
    print('Their total is: ', total)

此示例与for循环，列表，列表推导，行式文件读取，上下文管理器（＆＃34;使用open（...）＆＃34; stuff）以及查找值的总和相关名单。这里的好处是它汇总了文件中的所有行，并不关心有多少行（零或十亿或更多）

快乐的谷歌搜索！

TypeError：main（）缺少1个必需的位置参数：＆＃39; nums8＆＃39;

1 个答案: