Python不覆蓋文件

Question

我試圖通過替換行中的某些關鍵字來覆蓋特定文件的各個行。 我已經研究了多個問題，大多數答案都顯示了我已經實施的內容。 以下是代碼：

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個string ，將更改保存到該strings和write一旦你完成編輯的文本:)

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

然后立即執行以下操作：

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