Python将文本文件转换为全部大写

Question

我是 python 的新手，我想弄清楚如何编写一个程序，提示用户输入文本文件的名称，将文本文件的内容转换为全部大写，然后将其另存为新的文件。

Answer 1

import os


def main():
    fp = raw_input('Filename: ')
    if fp and os.path.isfile(fp):
        with open(fp, 'r') as f:
            txt = f.read()
        newfp = '{0}_upper{1}'.format(*os.path.splitext(fp))
        with open(newfp, 'w') as f:
            f.write(txt.upper())


if __name__ == '__main__':
    main()

Answer 2

Using Python 2.7.6 this works for me:

filename = raw_input("File Name: ")
with open(filename, 'r+') as f:
    text = f.read()
    f.seek(0)
    f.write(text.upper())
    f.truncate()