For loop Python

Question

I am having trouble with a particular for loop in my code.The error I get is "TypeError: coercing to Unicode: need string or buffer,list found

My code is :

current_dir = os. getcwd()
target_dire = [os.listdir(current_dir)]
for dirs in target_dirs:
   if is.path.isdir(dirs):
       print dirs[0]

  else:
       pass

Thanks in advance

Sorry my phone messed up the code indentation

Magicicada
– Magicicada

2014-02-11 06:05:34 +00:00
Commented Feb 11, 2014 at 6:05 — Magicicada
– Magicicada, Commented Feb 11, 2014 at 6:05
which line you get error

MONTYHS
– MONTYHS

2014-02-11 06:06:52 +00:00
Commented Feb 11, 2014 at 6:06 — MONTYHS
– MONTYHS, Commented Feb 11, 2014 at 6:06
The if statement line.

Magicicada
– Magicicada

2014-02-11 06:07:24 +00:00
Commented Feb 11, 2014 at 6:07 — Magicicada
– Magicicada, Commented Feb 11, 2014 at 6:07
print dir or check the type of dir

MONTYHS
– MONTYHS

2014-02-11 06:08:07 +00:00
Commented Feb 11, 2014 at 6:08 — MONTYHS
– MONTYHS, Commented Feb 11, 2014 at 6:08

Jason Sperske · Accepted Answer · 2014-02-12 01:06:27Z

2

os#listdir returns a list already. You do not need to wrap it again.

From the documentation:

Return a list containing the names of the entries in the directory given by path. The list is in arbitrary order. It does not include the special entries '.' and '..' even if they are present in the directory.

Source

To apply this to your program the following code should fit your needs:

import os

for dir in os.listdir(os.getcwd()):
    if os.path.isdir(dir):
        print dir

edited Feb 12, 2014 at 1:06

Jason Sperske

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answered Feb 11, 2014 at 6:06

skuroda

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8 Comments

Jason Sperske Over a year ago

By wrapping in [] you are creating a list of lists of dir entries. The for loop is iterating throughout the outermost list but dirs is just the second inner list. This will fix it.

Magicicada Over a year ago

Yes. That was intentional because if I don't do that it will print out the first letters of what is left in the list

skuroda Over a year ago

@user3295821 Please clarify what you are trying to do for additional help.

Jason Sperske Over a year ago

That is happening because of print dirs[0]. Strings are just lists or characters in Python (ok technically not true but it's an easy way to reason about this code). Change it to print dirs.

Magicicada Over a year ago

It works if I give it a specific offset,but I want it to iterate the whole list.

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