Via os.listdir and os.remove: import os filelist = [ f for f in os.listdir(mydir) if f.endswith(“.bak”) ] for f in filelist: os.remove(os.path.join(mydir, f)) Using only a single loop: for f in os.listdir(mydir): if not f.endswith(“.bak”): continue os.remove(os.path.join(mydir, f)) Or via glob.glob: import glob, os, os.path filelist = glob.glob(os.path.join(mydir, “*.bak”)) for f in filelist: os.remove(f) Be … Read more
File outputfile = new File(“image.jpg”); ImageIO.write(bufferedImage, “jpg”, outputfile);
If you only want to read the first 999,999 (non-header) rows: read_csv(…, nrows=999999) If you only want to read rows 1,000,000 … 1,999,999 read_csv(…, skiprows=1000000, nrows=999999) nrows : int, default None Number of rows of file to read. Useful for reading pieces of large files* skiprows : list-like or integer Row numbers to skip (0-indexed) … Read more
Optimum buffer size is related to a number of things: file system block size, CPU cache size and cache latency. Most file systems are configured to use block sizes of 4096 or 8192. In theory, if you configure your buffer size so you are reading a few bytes more than the disk block, the operations … Read more
The best way to do it is: String path = “C:” + File.separator + “hello” + File.separator + “hi.txt”; // Use relative path for Unix systems File f = new File(path); f.getParentFile().mkdirs(); f.createNewFile();
You could use the copy() function : // Will copy foo/test.php to bar/test.php // overwritting it if necessary copy(‘foo/test.php’, ‘bar/test.php’); Quoting a couple of relevant sentences from its manual page : Makes a copy of the file source to dest. If the destination file already exists, it will be overwritten.
The java.io.File and consorts acts on the local disk file system. The root cause of your problem is that relative paths in java.io are dependent on the current working directory. I.e. the directory from which the JVM (in your case: the webserver’s one) is started. This may for example be C:\Tomcat\bin or something entirely different, … Read more
Instead of using FileWriter, create a FileOutputStream. You can then wrap this in an OutputStreamWriter, which allows you to pass an encoding in the constructor. Then you can write your data to that inside a try-with-resources Statement: try (OutputStreamWriter writer = new OutputStreamWriter(new FileOutputStream(PROPERTIES_FILE), StandardCharsets.UTF_8)) // do stuff }
For completeness, the OP does not state he is looking to do this in a browser (if he is, as has been stated, it is generally not possible) However javascript per se does allow this; it can be done with server side javascript. See this documentation on the Javascript File class Edit: That link was … Read more
The following should help realpath — Returns canonicalized absolute pathname is_writable — Tells whether the filename is writable unlink — Deletes a file Run your filepath through realpath, then check if the returned path is writable and if so, unlink it.