List of files to be opened

[yawgmoth7]

Hello, I am currently writing a script that requires a few different
files to be opened, and examined. What I need to be able to do is use
something like:

filelist = os.system("ls")
<Some way to open the file list and read each file one by one here

I cannot think of a way to do this, I could put them in a list of
something of the sort. But that still does not solve the problem of
opening them one by one.

Thanks for all the advice and help.
--
gurusnetwork.org
Gurus'Network - Are you a guru?

[James Stroud]

yawgmoth7 wrote:

Hello, I am currently writing a script that requires a few different
files to be opened, and examined. What I need to be able to do is use
something like:

filelist = os.system("ls")
<Some way to open the file list and read each file one by one here
I cannot think of a way to do this, I could put them in a list of
something of the sort. But that still does not solve the problem of
opening them one by one.

Thanks for all the advice and help.
--
gurusnetwork.org
Gurus'Network - Are you a guru?

See os, os.path. Then check out the fileinput module.

A common pattern is:

for afilename in os.listdir(apath):
for aline in open(os.path.join(apath, afilename)):
# do something with aline

This allows you to do something with each line in a file.

Here are some urls that you will find helpful for these kind of things:

http://docs.python.org/api/fileObjects.html
http://docs.python.org/lib/module-fileinput.html
http://docs.python.org/lib/os-file-dir.html
http://docs.python.org/lib/module-os.path.html

James

[James Stroud]

yawgmoth7 wrote:

Hello, I am currently writing a script that requires a few different
files to be opened, and examined. What I need to be able to do is use
something like:

filelist = os.system("ls")
<Some way to open the file list and read each file one by one here
I cannot think of a way to do this, I could put them in a list of
something of the sort. But that still does not solve the problem of
opening them one by one.

Thanks for all the advice and help.
--
gurusnetwork.org
Gurus'Network - Are you a guru?

See os, os.path. Then check out the fileinput module.

A common pattern is:

for afilename in os.listdir(apath):
if os.path.isfile(os.path.join(apath, afilename)):
for aline in open(os.path.join(apath, afilename)):
# do something with aline

This allows you to do something with each line of each file in a directory.

Here are some urls that you will find helpful for these kind of things:

http://docs.python.org/api/fileObjects.html
http://docs.python.org/lib/module-fileinput.html
http://docs.python.org/lib/os-file-dir.html
http://docs.python.org/lib/module-os.path.html

James

[Ken Starks]

yawgmoth7 wrote:

Hello, I am currently writing a script that requires a few different
files to be opened, and examined. What I need to be able to do is use
something like:

filelist = os.system("ls")
<Some way to open the file list and read each file one by one here

I cannot think of a way to do this, I could put them in a list of
something of the sort. But that still does not solve the problem of
opening them one by one.

Thanks for all the advice and help.
--
gurusnetwork.org
Gurus'Network - Are you a guru?

os.walk is your friend. Its has wonderful functionality.

The documentation is in the subsection 'Files and Directories' of the os
module, and there are a couple of examples.

Global Module index --> os --> 'Files and Directories' (Section 6.1.4)
-->Bottom of page

[Carl J. Van Arsdall]

Ken Starks wrote:

yawgmoth7 wrote:

Hello, I am currently writing a script that requires a few different
files to be opened, and examined. What I need to be able to do is use
something like:

filelist = os.system("ls")
<Some way to open the file list and read each file one by one here

I cannot think of a way to do this, I could put them in a list of
something of the sort. But that still does not solve the problem of
opening them one by one.

Thanks for all the advice and help.
--
gurusnetwork.org
Gurus'Network - Are you a guru?

os.walk is your friend. Its has wonderful functionality.

Don't you mean os.path.walk ?

The documentation is in the subsection 'Files and Directories' of the os
module, and there are a couple of examples.

Global Module index --> os --> 'Files and Directories' (Section 6.1.4)
-->Bottom of page

--

Carl J. Van Arsdall
cv*********@mvista.com
Build and Release
MontaVista Software

[Fredrik Lundh]

Carl J. Van Arsdall wrote:

os.walk is your friend. Its has wonderful functionality.

Don't you mean os.path.walk ?

os.walk is a generator-based version of os.path.walk. instead of putting
the logic in a callback function, you put it in a for loop:

for root, dirs, files in os.walk(top):
for file in files:
file = os.path.join(root, file)
print file, "..."

os.listdir and glob.glob are still good choices if you just want the files in
a given directory.

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