Visit Our UNIX and Linux User Community

Populating Lists in Def using Python

Thread Tools Search this Thread
Top Forums Programming Populating Lists in Def using Python
# 1  
Old 10-29-2013
Populating Lists in Def using Python

Dipping around in python again and need to create a def that will populate a list(content) with the files that os.walk finds from within this directory and then I will through each files looking for content. In learning Python, can someone point me in the right direction. This is what I have so far.

def list_files ( content=None ):
    if content is None:
        content = []
        for files in os.walk('var/www/html/data/customer/log', topdown=True):
            return content

Many thanks in advanced.
# 2  
Old 10-29-2013
Basically os.walk returns a tuple (dirpath, dirnames, filenames). So, if you want the full path of every files, you have to join dirpath and filename:
content = []
for root, dirs, files in os.walk("/tmp", topdown=False):
    for name in files:
        content.append(os.path.join(root, name))


Note: if your directory doesn't have subdirs, you can also use os.listdir.
# 3  
Old 10-31-2013
ok I got my function to work using:

def list_files():
    content = []
    for files in os.walk('var/www/html/data/customer/log'):
    return content

next stupid question is how do I access one of the many files in the function? So the results of os.walk populates my list -- content [] with the files in the directory:

print list_files()
['var/www/html/data/customer/log', [], ['file1', 'file2', 'file3', 'file4']]

so how would I access that information so I can add additional logic to my script? when I attempt to access anything in my list, I get the following error


NameError: name 'content' is not defined

when not using a function I can access the elements a such:

In [66]: func = []

In [67]: func.extend( ("blah1","blah2" ) )

In [68]: print func
['blah1', 'blah2']
In [69]: print func[0]

In [70]: print func[1]

Last edited by metallica1973; 10-31-2013 at 01:19 PM..
# 4  
Old 11-05-2013
thnx for help

Previous Thread | Next Thread
Test Your Knowledge in Computers #128
Difficulty: Easy
Generally speaking, most of the software included in a Linux distro is free and open source.
True or False?

9 More Discussions You Might Find Interesting

1. Homework & Coursework Questions

KLIBC .def file

I am working on klibc. I need to add a new command in kernel. klibc contains a SYSCALLS.def file which declares functions. Where can I find definition of functions declared in .def file? (1 Reply)
Discussion started by: Vasundhara08
1 Replies

2. Programming

Python Concatenating 2 Lists

I am just trying to concatenate two lists together, but I am not sure what is wrong with my code, it won't run. Thank you for any help. #!/usr/bin/python # Takes two lists and returns a list that is the concatenation of both of # them. A = B = def list_concat( A, B): print(A) ... (2 Replies)
Discussion started by: totoro125
2 Replies

3. Shell Programming and Scripting

Separate Text File into Two Lists Using Python

Hello, I have a pretty simple question, but I am new to Python and am trying to write a simple program. Put simply, I want to take a text file that looks like this: 11111 22222 33333 44444 55555 66666 77777 88888 and produce two lists, one containing the contents of the left column, one the... (0 Replies)
Discussion started by: Tyler_92
0 Replies

4. Homework & Coursework Questions

[Python] Compare 2 lists

Hello, I'm new to the python programming, and I have a question. I have to write a program that prints a receipt for a restaurant. The input is a list which looks like: product1 product3 product8 .... In the other input file there is a list which looks like: product1 coffee 5,00... (1 Reply)
Discussion started by: dagendy
1 Replies

5. Programming

Python: Compare 2 word lists

Hi. I am trying to write a Python programme that compares two different text files which both contain a list of words. Each word has its own line worda wordb wordc I want to compare textfile 2 with textfile 1, and if there's a word in textfile 2 that is NOT in textfile 1, I want to... (6 Replies)
Discussion started by: Bloomy
6 Replies

6. Programming

populating a JList

Hi, I have to create a JList and the items I need to display are store in HashMap table. What would be the easiest way to populate this JList. Basically the items I want to display/show in the JList are the key values of the HashMap. Thanks in advance for any suggestions. (0 Replies)
Discussion started by: arizah
0 Replies

7. Shell Programming and Scripting

Shell Script to Create non-duplicate lists from two lists

File_A contains Strings: a b c d File_B contains Strings: a c z Need to have script written in either sh or ksh. Derive resultant files (File_New_A and File_New_B) from lists File_A and File_B where string elements in File_New_A and File_New_B are listed below. Resultant... (7 Replies)
Discussion started by: mlv_99
7 Replies

8. Shell Programming and Scripting

Populating an Array

Guys, I need to iterate populate an array while going over files in directory. Can someone please tell me syntax I tried this but it isn't working ==> for F in `ls -p "${directory1}" | grep -v "\/"` do cd "${directory2}" cmp "${directory2}"/"${F}" "${directory1}"/"${F}" ... (2 Replies)
Discussion started by: Veenak15
2 Replies

9. Shell Programming and Scripting

.def file in HP-UX Shell scripting

Hi Pals, I need some information related .def file in HP-Ux shell scripting. What actaully a .def file contains. It is having all definitions of some functions. But what is the relationship between a .def file and shell script. Can anyone give some examples. Thanks in Advance. Best... (1 Reply)
Discussion started by: manu.vmr
1 Replies

Featured Tech Videos