Python 从文件中读取和求和数字

这是输入文本：

1 100
100 1

这是输出文本：

Please enter name of input file:  input.txt
Please enter name of output file:  output.txt
Sum from 1 to 100 is 5050
Sum from 1 to 100 is 5050...etc

我的代码：

def sum():
  file1 = input("Plese enter name of input file:")
  fileref = open("file1","r")
  file2 = input("Plese enter name of output file:")
  fileref2 = open("file2","w")

在命令提示下：

>>> print(sum())
FileNotFoundError: [Errno 2] No such file or directory: 'file1' for fileref = open("file1","r")

您传递的是字符串，而不是变量File1和File2`

您的代码中似乎有一些错误，隐藏内置和重新分配变量，并试图在不存在的行上拆分，等等。。此外，您从未实际使用过文件\u ref2

我在变量和函数名中使用了下划线，这是推荐的python方式。

好吧，您需要

file1 = input("Plese enter name of input file:")
fileref = open(file1,"r")
file2 = input("Plese enter name of output file:")
fileref2 = open(file2,"w")

在开放式指令中，为什么引用变量？试试这个：fileref=openfile1，r。file2也是如此。

def sum(): 
      file1 = input("Plese enter name of input file:")
      fileref = open(file1,"r") # now the actual variable
      file2 = input("Plese enter name of output file:")
      fileref2 = open(file2,"w") # same here

def my_sum(): # changed to my_sum to avoid major problems when using sum in your function
    file1 = input("Please enter name of input file:")
    file2 = input("Please enter name of output file:")

    # with close files automatically, you never use file2 but maybe you intend to write output to that 
    with open(file1,"r") as file_ref, open(file2,"w") as file_ref2: 
        result = []
         # x gets reassigned in your loop below, so this is redundant
        x = file_ref.readline()
        for x in file_ref:
            # changed to x.split(), line did not exist
            n, m = x.split() 
            # need to be ints for range
            min_number = int(min(n,m))
            max_number = int(max(n,m))
            for y in range(min_number, max_number):
                # not sure which x you actually expected here but the current x will give an error
                result.append(int(x)) 
                # in your code you were calling your own function here
                sum_result = sum(result)
            print('Sum from {} to {} is {}'.format(min_number, max_number, sum_result))
            # reset result for next line
            result = []
    # you were calling your own function again 
    return sum(result) 

file1 = input("Plese enter name of input file:")
fileref = open(file1,"r")
file2 = input("Plese enter name of output file:")
fileref2 = open(file2,"w")