I`m creating a program that can read certain data from some txt files, the problem comes when I try to use the files inside subdirectories (the subdirectories are inside the main directory of the program. I'm using a for the option to find all the files and then create a new file with the info that I found. The main problem is that I can't read those files.
I tried using a for a function that creates a list of directories, files and roots, this works fine, but in the moment of running the file it says "it cannot be found txt file". The if not condition is made so the program excludes all.DS_Store files. I think the problem could be the way I open the file but im not sure
for root, directories, filenames in os.walk("Files_to_Insert"):
if not (filenames[-1] == ".DS_Store"):
lastFile = filenames[-1]
print lastFile
with open (lastFile, 'rt') as myfile:
IOError: [Errno 2] No such file or directory: txt
The mistake happens in the with open because it can`t find the file.
When I print I get all the txt files, but I can,t use them in the "with open"
A typical os.walk I use goes like this:
import os
for root, directories, filenames in os.walk("."):
for f in filenames:
if f.endswith(".DS_Store"):
continue
print(os.path.abspath(f))
with open (os.path.abspath(f), 'rt') as myfile:
I solve it by giving the path and the text file in separate strings:
for root, directories, filenames in os.walk("Files_to_Insert"):
if not(filenames[-1] == ".DS_Store"):
lastFile = filenames[-1]
# print (lastFile)
with open(str(root) + '/' + lastFile,'rt') as myfile:
Related
Scenario: I am trying to Rename all .txt file named "a.txt" in all subfolders of a directory.
Question: I came up with the following code, but it has and issue: My loops don't work as expected, I was hoping to get the directory loop, to use the last part of the path, and use that string to rename the file. Right now, my code will rename the file with the latest directory name. How can this be fixed?
Code:
import os
import fnmatch
directory = "C:/Users/DGMS/Desktop/Test"
for root, subdirectories, files in os.walk(directory):
for subdirectory in subdirectories:
pathtest = os.path.basename(os.path.normpath(os.path.join(root, subdirectory)))
print(pathtest)
for file in files:
if fnmatch.fnmatch(file, 'a.txt'):
os.rename(os.path.join(root, file),(os.path.join(root, pathtest)))
print(os.path.join(root, file))
Here is a better code for what you want. All "a.txt" now becomes "b.txt"
import os
rootdir = 'C:/Users/sid/Desktop/test'
for subdir, dirs, files in os.walk(rootdir):
for file in files:
if file == "a.txt"
os.rename(os.path.join(subdir, file),os.path.join(subdir, "b.txt"))
I am REALLY (2 days) new to all of this. I am trying to delete a bunch of files in a folder in my external HD with a python 3.7.3 script but an error keeps popping up.
Firstly, this code works fine and finds the folders:
import os
for folderName, subfolders, filenames in os.walk("D:\Practice"):
for filename in filenames:
if filename.endswith('practice.docx'):
#os.unlink(filename)
print(filename)
But then when I remove the print(filename) the remove the hash, the folders can't be deleted with the following error popping up:
import os
for folderName, subfolders, filenames in os.walk("D:\Practice"):
for filename in filenames:
if filename.endswith('practice.docx'):
os.unlink(filename)
os.unlink(filename) FileNotFoundError: [WinError 2] The system cannot find the file specified: 'rootpractice.docx'
The 'rootpractice' doc is clearly recognised but won't be deleted.
Does anyone know how I can solve this? Any help for this total beginner is much appreciated.
os.unlink and similar other methods which require file paths expect either a link relative to current folder in which your script is running (which you can find out with os.getcwd() ), or the full path.
When you are iterating with os.walk, you are only passing the filename and not the full path. Try this:
import os
for folderName, subfolders, filenames in os.walk("D:\Practice"):
for filename in filenames:
if filename.endswith('practice.docx'):
full_path = os.path.join(folderName, filename)
print("About to delete the file: {}".format(full_path))
os.unlink(full_path)
I am trying to open 2 text files on PyCharm but it says file not found. Where do I put the files so they can be found?
I tried moving the files to the folder where all my PyCharm projects are kept but it didn't work.
dna = open('dna.txt', 'r')
dna.close()
dna_results = open("dnaresults.txt", "w")
dna_results.close()
Expected: I don't know honestly, for the text file to open on PyCharm so I can read it?
Actual: FileNotFoundError: [Errno 2] No such file or directory: 'dna.txt'
You need to pass the full path of the file in order to open it, for e.g. if the file is located at /home/john/dna.txt, you need to do.
dna = open('/home/john/dna.txt', 'r')
dna.close()
You can put your file anywhere you want, but you always need to pass the full path of the file in order to access it, otherwise the python interpreter doesn't know where to find it.
As an additional tidbit, if the dna.txt is located in the same folder as where the script is located, dna = open('dna.txt', 'r') will work
I'm working on a Python3 script where the code walks through directories and sub-directories to pull out all gzipped warc files.
I'd like to also add that the files are not in my home directory
file_path = os.path.join('/nappa7/pip73/Service')
walk_file(parallel_bulk, file_path)
Perhaps python is not looking where i think it's looking, nevertheless, here is my walk_file functions:
def walk_file(bulk, file_path):
warc = warcat.model.WARC()
try:
for (file_path,dirs,files) in os.walk(file_path):
for filenames in files:
if filenames.endswith('.warc.gz'):
warc.load(filenames)
except ValueError:
pass
When I replace the warc.load(filenames) with a print statement like so:
if filenames.endswith('.warc.gz'):
print(filenames)
The filenames are printed out onto the console as expected. Therefore, It leads me to believe that python was able to succesfully locate all warc.gz files. However, when i try the warc.load(filenames), i get:
FileNotFoundError: [Errno 2] No such file or directory: 'Sample.warc.gz'
I can certainly use some guidance.
Thank you.
So for anyone else who has a similar issue:
changing the code to this worked:
warc.load(os.path.join(file_path, filenames))
You need to use os.path.join(file_path, filenames) instead of just filenames.
Otherwise the operating system will look for the file in the current directory instead of file_path.
(And why is filenames plural when it refers to a single filename?)
I am working on a search-and-destroy type program which I need it to do is search all directories with a certain file-name and append them to a list. after that delete all those files...not objects in list or the list...
import os
file_list=[]
for root, dirs, files in os.walk(path-to-dir'):
for f_name in files:
if f_name.startswith("file-name"):
file_list.append(f_name)
I could write up to appending part of the code but I don't know next...
Some help please
To remove a file from your computer, use os.remove(). It takes full path to the file as it's parameter, so instead of calling os.remove("infectedFile.dll") you would call os.remove("C:/program files/avira/infectedFile.dll")
So your file_list should contain full paths to the files, and then just call:
for file in file_list:
os.remove(file)
Modify your file_list.append(f_name). The f_name is only a bare name. You need to add the path to the file name in the time of processing, because you do not know where the file was found in the directory hierarchy:
file_list.append(os.path.join(root, f_name))
The root variable contains the path during walking.
To make check whether your code works, just print the content of the list:
print('\n'.join(file_list))
Or you can do it in the loop to get ready for the later part:
for fname in file_list:
print(fname)
Then you just add the os.remove(fname) to remove the file name:
for fname in file_list:
print('removing', fname)
os.remove(fname)