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 pythonimport 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 Noneif not os.path.isfile(filename):print("ERROR: %s not a filename." % (filename))return Nonef = 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 pythonimport osdef 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()