无列表逐行比较 2 个文件

Question

对于这个项目，我想在 Python 中逐个字符地比较来自不同文件的两行。我无法让程序返回或打印任何内容。程序需要做到以下几点：

• 读取每个文件的下一行

for line1 in currentLine1: for line2 in currentLine2:

• 判断线条是否长度不同

              if len.line1 != len.line2:  # If the line lengths are not equal return the line number
              return charByChar(count=count + 1, differenceCounter=differenceCounter, textCount1=textCount1,
                                textCount2=textCount2, difLineCounter=difLineCounter)
  

• 如果行的长度相同，比较字符

              if len.line1 == len.line2:  # If the lines lengths are equal
                  for char in range(len(line1)):  # Compare line by line
  

• 如果他们匹配不做任何事情。但是，如果它们匹配打印不匹配的字符（1）；使用 N:M 格式打印行号（2）；处理下一行(3)。

                      if line1[char] != line[char]:  # If the lines have different characters
                          print("Unmatched characters")
                          print("Line number:", count)
                          print("First different character", char)
                          differenceCounter = difLineCounter + 1  # add 1 to the difference counter
                          textCount1 = textCount1 + 1
                          textCount2 = textCount2 + 1
                  return charByChar(count=count, differenceCounter=differenceCounter, textCount1=textCount1,
                                textCount2=textCount2)  # return difference count
  

• 最后打印出第一个文件的字符数（1）；第二个文件的字符数（2）；相同长度的行中不匹配的字符数（3）；长度不同的行数（4）。

              if len.line1 == 0 or len.line2 == 0:
              print("Extra lines are not matching")
          **Some print then return statement**
  

我相信我已经完成了这一切，但是，我的代码从不返回任何值。它总是以退出代码 0 结尾（我引用了 2 个文本文件进行比较）。

这里是我写的所有代码

text1 = open("file1.txt", "r")
text2 = open("file2.txt", "r")
content1 = text1.read()
content2 = text2.read()


def charByChar(count=0, differenceCounter=0, textCount1=0, textCount2=0, difLineCounter=0):
    currentLine1 = content1
    currentLine2 = content2
    line = text1.readline(count)
    if line != '':
        for line1 in currentLine1:
            for line2 in currentLine2:
                if len.line1 != len.line2:  # If the line lengths are not equal return the line number
                    return charByChar(count=count + 1, differenceCounter=differenceCounter, textCount1=textCount1,
                                      textCount2=textCount2, difLineCounter=difLineCounter)
                if len.line1 == len.line2:  # If the lines lengths are equal
                    for char in range(len(line1)):  # Compare line by line
                        if line1[char] != line[char]:  # If the lines have different characters
                            print("Unmatched characters")
                            print("Line number:", count)
                            print("First different character", char)
                            differenceCounter = difLineCounter + 1  # add 1 to the difference counter
                            textCount1 = textCount1 + 1
                            textCount2 = textCount2 + 1
                    return charByChar(count=count, differenceCounter=differenceCounter, textCount1=textCount1,
                                      textCount2=textCount2)  # return difference count
                if len.line1 == 0 or len.line2 == 0:
                    print("Extra lines are not matching")
    text2.close()
    text1.close()


def main():
    charByChar()


main()

Answer 1

您的函数charByChar() 似乎没有返回基本情况。例如，在您记录额外行不匹配的地方，尝试返回 False 或 -1，或者你有什么。