将输出写入文件时遇到问题

Question

下面是我的代码，我正在处理的问题是让我的程序的输出“写入一个文件，该文件的名称是通过将字符串 _output 附加到输入文件名来获得的”。

这样做的正确方法是什么？

fileName = raw_input('Enter the HTML file name:') + '.html'
f = open(fileName, 'r')
myList = f.readlines()
for i in range(0, len(myList)):
    toString = ''.join(myList)
newString = toString.replace('<span>', '')
newString = newString.replace('</span>', '')
print newString  #testing the output
f.close()

这是修改后的代码。像这样？

fileName = raw_input('Enter the HTML file name:') + '.html'
f = open(fileName, 'r')
fnew = open(fileName, 'w')
myList = f.readlines()
for i in range(0, len(myList)):
    toString = ''.join(myList)
newString = toString.replace('<span>', '')
newString = newString.replace('</span>', '')
fnew.write(newString)
f.close()

Answer 1

试试；

fileName = raw_input('Enter the HTML file name:') + '.html'
f = open(fileName, 'r+')
toString = f.read()
newString = toString.replace('<span>', '')
newString = newString.replace('</span>', '')
print newString  #testing the output

f.truncate() #clean all content from the file
f.write(newString) #write to the file
f.close()

请参考这篇文章：In Python, is read() , or readlines() faster?

如果你想将输出打印到一个新文件中；

new_file = open(new_file_path, 'w') #If the file does not exist, creates a new file for writing
new_file.write(newString)
new_file.close()

现在不用打开第一个html文件read/write使用

f = open(fileName, 'r')