I have just started learning Python and i am working on a code in which it list all the files in a directory of .doc extension.
Here is the code
#The code is run by defining the path at the command line argument i.e.
# python test.py /home/get/Desktop/python
import os
import sys
print "command line argument is", sys.argv[1]
#path = "/home/gt/Desktop/python"
for file in [doc for doc in os.listdir(sys.argv[1]) if doc.endswith(".doc")]:
print file
Now it prints the names of the files which have .doc extension but i want to store all those file names in an array or some kind of variable. But i don’t know how to save all this information and stuck here in Python.
Because once i get these filenames stored in a kind of array then i need read these files.
I have somehow worked around with the array, but now i am getting an error when i am about to finish.
What i have done now is that i have initialized a blank array and storing the file names in that array. and now it stores all the names.
Now i am trying to read the lines written in those files which i have stored in the array but their i am getting the error.
I have highlighted the error with comments in the script.
file_list = []
print "command line argument is", sys.argv[1]
#path = "/home/gt/Desktop/python"
for file in [doc for doc in os.listdir(sys.argv[1])
if doc.endswith(".doc")]:
file_list.append(file)
for i in range(len(file_list)):
#Works fine till here when printing the file names
print file_list[i]
#But getting error here
# Says IOError: [Errno 2] No such file or directory: 'file_list[0]'
f = open(r'file_list[i]')
for j in range(2):
print str(j) + ': ' + f.readline(),
f.close()
I’m not sitting in front of a 'puter w/ python on it, plus I’m fairly green at this stuff myself. But this bit:
#But getting error here
# Says IOError: [Errno 2] No such file or directory: 'file_list[0]'
f = open(r'file_list[i]')
I think its complaining because file_list is the name of your array (list), and you are telling to open the list as a file - which doesn’t work. Plus it looks like your file open syntax is a little off as well. What you want (I think) is to pull the file names from the list, and present them to the file open command like this:
for file in file_list:
f = open(file, 'r')
No guarantees, as I’m shootin’ from the hip here (and looking at the python docs as I go).
Not quite sure I grok what you’re trying to do with the last bit of code, though.
As you can see in my script that i am taking command line arguments (which is that path to scan the doc files)
i am trying to apply try and except on it, So that if the user don’t pass the CLI then it handles the situation. but its not working well.
try:
for file in [doc for doc in os.listdir(sys.argv[1])
if doc.endswith(".doc")]:
file_list.append(file)
for files in file_list:
f = open(file,'r')
# for i in range(len(file_list)):
# print "The contents of file", file_list[i], "are:"
# print " "
# f = open(file_list[i],'r')
for j in range(2):
print str(j) + ': ' + f.readline(),
f.close()
print " "
except IOError:
handle_error()
except IOError, (errno, strerror):
print "I/O error(%s): %s" % (errno, strerror)
except ValueError:
print "Could not convert data to an integer."
except:
print "Unexpected Error:", sys.exc_info()[0]
raise
so, the errors comes at this line
for file in [doc for doc in os.listdir(sys.argv[1])
and then the try and except fails to handle the exception.
Hi, this is an old question but I am just trying to answer it. I’ve just joined sitepoint.
In python, if you want to iterate through a list you only need to mention the list in a ‘for’ statement. You don’t need to use range(…). So this is your code, with some corrections to make it work.
import sys, os
file_list = []
print "command line argument is", sys.argv[1]
#path = "/home/gt/Desktop/python"
for file in [doc for doc in os.listdir(sys.argv[1])
if doc.endswith(".xml")]:
file_list.append(file)
for i in file_list:
print i
f = open(i, 'r')
for j in range(2):
print str(j) + ': ' + f.readline(),
f.close()
Please note the for statement: for i in file_list.
