Python不覆盖文件

Question

我试图通过替换行中的某些关键字来覆盖特定文件的各个行。 我已经研究了多个问题，大多数答案都显示了我已经实施的内容。 以下是代码：

with open(fileLocation,"r+") as openFile:
    for line in openFile:
        if line.strip().startswith("objectName:"):
            line =  re.sub(initialName.replace(".qml",""),camelCaseName.replace(".qml",""),line)
            print line
            openFile.write(line)

    openFile.close()

Answer 1

你可以在文件的文本保存到一个string ，将更改保存到该strings和write一旦你完成编辑的文本:)

finalText = ""  # Here we will store the complete text

with open(fileLocation, "r") as openFile:
    for line in openFile:
        if line.strip().startswith("objectName:"):
            line = ... # do whatever you want to do with the line.
        finalText += line

然后立即执行以下操作：

with open(fileLocation, 'w') as openFile:
    openFile.write(finalText)