Build lists of matched lines – several flavors: def lines_that_equal(line_to_match, fp): return [line for line in fp if line == line_to_match] def lines_that_contain(string, fp): return [line for line in fp if string in line] def lines_that_start_with(string, fp): return [line for line in fp if line.startswith(string)] def lines_that_end_with(string, fp): return [line for line in fp if … Read more
The FilesMatch directive works purely on filenames. It doesn’t look at the path portion at all. If you want to specify directives in the root .htaccess file to control a subdirectory, you can use mod_rewrite. Try this: RewriteRule ^uploads/.*\.(php|rb|py)$ – [F,L,NC] The above will block any filename ending in .php or .rb or .py in … Read more
You can use sum() with a generator expression: with open(‘data.txt’) as f: print sum(1 for _ in f) Note that you cannot use len(f), since f is an iterator. _ is a special variable name for throwaway variables, see What is the purpose of the single underscore “_” variable in Python?. You can use len(f.readlines()), … Read more
Another option is to use the prlimit command (from the util-linux package). For example if you want to set the maximum number of open files for a running process to 4096: prlimit -n4096 -p pid_of_process
The open on the source file is unnecessary, since os.rename only needs the source and destination paths to get the job done. Moreover, os.rename always returns None, so it doesn’t make sense to call open on its return value. import os import sys folder=”E:/…/1936342-G/test” for filename in os.listdir(folder): infilename = os.path.join(folder,filename) if not os.path.isfile(infilename): continue … Read more
Say you have a file with many empty bytes \x00. These many empty bytes \x00 are called holes. Storing empty bytes is just not efficient, we know there are many of them in the file, so why store them on the storage device? We could instead store metadata describing those zeros. When a process reads … Read more
This code Future<List<String>> readHeaderData() async { List<String> l = new List(); List<String> files = await readHeaders(); // Gets filenames files.forEach((filename) async { final file = await File(filename); String contents = await file.readAsString(); User user = User.fromJson(json.decode(contents)); String name = user.NameLast + “, ” + user.NameFirst; print(name); l.add(name); } return l; } returns the list l … Read more
I know this is an old post but this may help others so… If you specifically know the elements that you are looking for then you can simply specify the element like so: # Read the existing file [xml]$xmlDoc = Get-Content $xmlFileName # If it was one specific element you can just do like so: … Read more
It could well be a permission problem. From the documentation: The Exists method returns false if any error occurs while trying to determine if the specified file exists. This can occur in situations that raise exceptions such as passing a file name with invalid characters or too many characters, a failing or missing disk, or … Read more
import os, random random.choice(os.listdir(“C:\\”)) #change dir name to whatever Regarding your edited question: first, I assume you know the risks of using a dircache, as well as the fact that it is deprecated since 2.6, and removed in 3.0. Second of all, I don’t see where any race condition exists here. Your dircache object is … Read more