pwtools.decorators.open_and_close

pwtools.decorators.open_and_close(func)

Decorator for all parsing functions that originally got a file name and went thru the whole file b/c the things that they search can occur in arbitrary order. These functions did

• open the file

• go thru

• close file

Now, they all expect file objects, as first argument. This decorator assures that the first arg to func is a file object.

Cases:

• 1st arg is a fileobject: do nothig, just call function

• 1st arg is a file name:

  • open file

  • call func

  • close file

Examples

>>> @open_and_close
>>> def file_txt_content(fh):
...     # fh is a file object
...     return fh.read()
>>> fh = open('my_file.txt')
>>> print(file_txt_content(fh))
>>> fh.close()
>>>
>>> print(file_txt_content('my_file.txt'))