recursive file editing

[TaeKyon]

Il Sat, 03 Apr 2004 17:22:04 -0800, Josiah Carlson ha scritto:

> for thing in os.walk('mydir'):
>      filehandle = file(thing, 'r+')

I'm such a newbe I can't get it to work. Here is an example:

in empty directory foo I touch a b c d;
suppose I want to write "This works !" in each of these files.

I run python
>>> import os
>>> for thing in os.walk('foo'):
...     thingopen = file(thing,'r+')
...     thingopen.write("This works !")
...     thingopen.close()
...
Traceback (most recent call last):
  File "<stdin>", line 2, in ?
TypeError: coercing to Unicode: need string or buffer, tuple found

And in fact:

>>> for thing in os.walk('foo'):
...     print thing
...
('foo', [], ['a', 'b', 'c', 'd'])

which is a tuple, I suppose.

Selecting thing[2] doesn't help, because it now complains of it being a
list.

In the end I get this to work:

for filetuple in os.walk('foo'):
...     for filename in filetuple[2]:
...         fileopen = file(filename, 'r+')
            fileopen.write("This works !")
            fileopen.close()

which seems a bit of a clumsy way to do it.
And besides it only works if I run python from directory foo,
otherwise it tells me "no such file or directory".

--  
Michele Alzetta