Python小程序：获取文本文件的所有内容

有时候希望获取一个文本文件的所有内容，但又不希望有打开文件、读文件、关闭文件这些繁琐的步骤，因此需要用一个小程序把这几个步骤封装起来，一句话完成所需要的获取文件内容的操作。为此，这里给出一个示例代码。

代码如下(get_text_file.py)：

#! /usr/bin/env python

import os

'''
get all the content of the file of the specified text file.

input: filename - the filename of the text file 
return: content - string. all the content of filename. 
        if the filename not a valid regular file, then return none, and error information is printed.
'''
def get_text_file(filename):
	if not os.path.exists(filename):
		print("error: file not exit: %s" % (filename))
		return none

	if not os.path.isfile(filename):
		print("error: %s not a filename." % (filename))
		return none

	f = open(filename, "r")
	content = f.read()
	f.close()

	return content

使用示例：

>>> import get_text_file
>>> content = get_text_file.get_text_file("./get_text_file.py")
>>> print(content)
#! /usr/bin/env python

import os

def get_text_file(filename):
        if not os.path.exists(filename):
                print("error: file not exit: %s" % (filename))
                return none

        if not os.path.isfile(filename):
                print("error: %s not a filename." % (filename))
                return none

        f = open(filename, "r")
        content = f.read()
        f.close()

        return content



>>> content = get_text_file.get_text_file("not_exist_filename")
error: file not exit: not_exist_filename
>>> exit()