read multi files from a folder and creat a new one

[xiaoboren]

Hi,
Thank you for read my problem.

My problem:

I have a folder which contains some .txt files, I want to read all of these files and write the data of these files into a new file.

Thanks for your help advance!!
I use Python 2.5 in Windows platform.

[bvdet]

Hi,
Thank you for read my problem.

My problem:

I have a folder which contains some .txt files, I want to read all of these files and write the data of these files into a new file.

Thanks for your help advance!!
I use Python 2.5 in Windows platform.

I will use the function I posted in this thread: LINK
[code=Python]fn = 'your_output_fi le'
outputfile = open(fn, 'w')
for f in dirEntries('you r path', 0, 'txt'):
outputfile.writ e('%s\n' % open(f).read())
outputfile.clos e()[/code]Much easier than it sounds!

[xiaoboren]

[CODE=python]import os

def dirEntries(dir_ name, subdir, *args):
'''Return a list of file names found in directory 'dir_name
If 'subdir' is True, recursively access subdirectories under 'dir_name'.
Additional arguments, if any, are file extensions to match filenames.
Matched file names are added to the list.
If there are no additional arguments, all files found in the directory are
added to the list.
Example usage: fileList = dir_list(r'H:\T EMP', False, 'txt', 'py')
Only files with 'txt' and 'py' extensions will be added to the list.
Example usage: fileList = dir_list(r'H:\T EMP', True)
All files and all the files in subdirectories under H:\TEMP will be added
to the list.
'''
fileList = []
for file in os.listdir(dir_ name):
dirfile = os.path.join(di r_name, file)
if os.path.isfile( dirfile):
if len(args) == 0:
fileList.append (dirfile)
else:
if os.path.splitex t(dirfile)[1][1:] in args:
fileList.append (dirfile)
# recursively access file names in subdirectories
elif os.path.isdir(d irfile) and subdir:
print "Accessing directory:", dirfile
fileList += dirEntries(dirf ile, subdir, *args)
return fileList


fn='out_putfile s'

outputfile= open(fn,'w')
for f in dirEntries( 'C:/Documents and Settings/ren/Desktop/JY',0,'txt'):
outputfile.writ e('%s\n' % open(f).read())
outputfile.clos e()

# I changed the .txt to txt, but it still doesn't work. Here is the wrong message:
[/CODE]Traceback (most recent call last):
File "C:\Documen ts and Settings\ren\De sktop\JY\JY_fil es.py", line 34, in <module>
for f in dirEntries( 'C:/Documents and Settings/ren/Desktop/JY',0,'txt'):
TypeError: 'NoneType' object is not iterable#

I don't know why!!!
Thanks!

[bartonc]

Hi xiaoboren. I've added the CODE tags to your post. Instructions for doing this yourself are on the right hand side of the page when you reply. They are called "REPLY GUIDELINES". Thank you for taking the time to read them.

Welcome,
Barton

[bvdet]

[CODE=python]import os

def dirEntries(dir_ name, subdir, *args):
'''Return a list of file names found in directory 'dir_name
If 'subdir' is True, recursively access subdirectories under 'dir_name'.
Additional arguments, if any, are file extensions to match filenames.
Matched file names are added to the list.
If there are no additional arguments, all files found in the directory are
added to the list.
Example usage: fileList = dir_list(r'H:\T EMP', False, 'txt', 'py')
Only files with 'txt' and 'py' extensions will be added to the list.
Example usage: fileList = dir_list(r'H:\T EMP', True)
All files and all the files in subdirectories under H:\TEMP will be added
to the list.
'''
fileList = []
for file in os.listdir(dir_ name):
dirfile = os.path.join(di r_name, file)
if os.path.isfile( dirfile):
if len(args) == 0:
fileList.append (dirfile)
else:
if os.path.splitex t(dirfile)[1][1:] in args:
fileList.append (dirfile)
# recursively access file names in subdirectories
elif os.path.isdir(d irfile) and subdir:
print "Accessing directory:", dirfile
fileList += dirEntries(dirf ile, subdir, *args)
return fileList


fn='out_putfile s'

outputfile= open(fn,'w')
for f in dirEntries( 'C:/Documents and Settings/ren/Desktop/JY',0,'txt'):
outputfile.writ e('%s\n' % open(f).read())
outputfile.clos e()

# I changed the .txt to txt, but it still doesn't work. Here is the wrong message:
[/CODE]Traceback (most recent call last):
File "C:\Documen ts and Settings\ren\De sktop\JY\JY_fil es.py", line 34, in <module>
for f in dirEntries( 'C:/Documents and Settings/ren/Desktop/JY',0,'txt'):
TypeError: 'NoneType' object is not iterable#

I don't know why!!!
Thanks!

Your indentation is wrong in the function dirEntries(). It should look like this:[code=Python]import os

def dirEntries(dir_ name, subdir, *args):
'''Return a list of file names found in directory 'dir_name'
If 'subdir' is True, recursively access subdirectories under 'dir_name'.
Additional arguments, if any, are file extensions to match filenames. Matched
file names are added to the list.
If there are no additional arguments, all files found in the directory are
added to the list.
Example usage: fileList = dir_list(r'H:\T EMP', False, 'txt', 'py')
Only files with 'txt' and 'py' extensions will be added to the list.
Example usage: fileList = dir_list(r'H:\T EMP', True)
All files and all the files in subdirectories under H:\TEMP will be added
to the list.
'''
fileList = []
for file in os.listdir(dir_ name):
dirfile = os.path.join(di r_name, file)
if os.path.isfile( dirfile):
if len(args) == 0:
fileList.append (dirfile)
else:
if os.path.splitex t(dirfile)[1][1:] in args:
fileList.append (dirfile)
# recursively access file names in subdirectories
elif os.path.isdir(d irfile) and subdir:
print "Accessing directory:", dirfile
[fileList.append (f) for f in dirEntries(dirf ile, subdir, *args)]
return fileList[/code]

[xiaoboren]

thank you very much, the problem is fixed. Thanks!
You are expert.
Thanks for your function.
Thanks!

Xiaobo