file-handling

问题 I can't find a way of reading the Minecraft world files in a way that i could use in python I've looked around the internet but can find no tutorials and only a few libraries that claim that they can do this but never actually work from nbt import * nbtfile = nbt.NBTFile("r.0.0.mca",'rb') I expected this to work but instead I got errors about the file not being compressed or something of the sort OSError: Not a gzipped file (b'\x00\x00') Full errors: raceback (most recent call last): File "C:

问题 I have to read a csv file line by line and change line break (alt+enter that is \n\r) with space and comas out side of fields with Ctrl+A (\001). As I try this with reading Buffered Reader, it takes line from \n and not interpret \n\r as non line break character. How can I handle this. I have to done this in java 回答1: You can read the entire file into a String variable and then use String.replaceAll() to replace the characters as you want:- File file = new File("abc.csv"); FileInputStream fis

问题 I created a text file named Write.txt in the Documents folder in a Xamarin.iOS app. After that I was able to read its content to the console. var documents = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments); var filename = Path.Combine(documents, "Write.txt"); File.WriteAllText(filename, "Write this text into a file"); var text = File.ReadAllText(filename); Console.WriteLine(text); // prints out correctly The problem is, that I can't found this file on the iPhone simulator's

问题 The app I'm working on needs to handle files with very long file/path names. It's a .Net 4.6 application so I've implemented the pre-4.6.2 workaround to allow the \\?\ syntax as outlined here and here. This is the code I'm using to enable the feature (I can't modify the app.config so this has to be set in code): var type = Type.GetType("System.AppContext"); if (type != null) { AppContext.SetSwitch("Switch.System.IO.UseLegacyPathHandling", false); AppContext.SetSwitch("Switch.System.IO

问题 The app I'm working on needs to handle files with very long file/path names. It's a .Net 4.6 application so I've implemented the pre-4.6.2 workaround to allow the \\?\ syntax as outlined here and here. This is the code I'm using to enable the feature (I can't modify the app.config so this has to be set in code): var type = Type.GetType("System.AppContext"); if (type != null) { AppContext.SetSwitch("Switch.System.IO.UseLegacyPathHandling", false); AppContext.SetSwitch("Switch.System.IO

问题 How to set read-only access for a file that's been created and written using java InputStream API. 回答1: In my opinion, it's good to check whether the file has been created or exists first and then set the read only flag. File file = new File("C:/path/file.txt"); if (file.exists()) { file.setReadOnly(); } else { System.out.println("File does not exists."); } 回答2: Well their are two ways to do it. The first would be: myFile.setReadable(false); . This make the file unreadable by all applications

问题 I've been learning about filehandles in Perl, and I was curious to see if there's a way to alter the source code of a program as it's running. For example, I created a script named "dynamic.pl" which contained the following: use strict; use warnings; open(my $append, ">>", "dynamic.pl"); print $append "print \"It works!!\\n\";\n"; This program adds the line print "It works!!\n"; to the end of it's own source file, and I hoped that once that line was added, it would then execute and output "It

问题 I'm a reading a text file with several hundred lines of data in python. The text file contains data written as a tuple assignment. For example, the data looks exactly like this in the text file: d1: p,h,t,m= 74.15 18 6 0.1 ign: 0.0003 d2: p,h,t,m= 54. 378 -0.14 0.1 ign: 0.0009 How can I separate the data as such: p = 20 t = 15 etc. Then, how can I perform calculations on the tuple assignment? For example calculate: p*p = 20*15? I am not sure if I should convert the tuple assignment to an

问题 I'm a reading a text file with several hundred lines of data in python. The text file contains data written as a tuple assignment. For example, the data looks exactly like this in the text file: d1: p,h,t,m= 74.15 18 6 0.1 ign: 0.0003 d2: p,h,t,m= 54. 378 -0.14 0.1 ign: 0.0009 How can I separate the data as such: p = 20 t = 15 etc. Then, how can I perform calculations on the tuple assignment? For example calculate: p*p = 20*15? I am not sure if I should convert the tuple assignment to an

问题 I did the commands (source): $ exec 3>/tmp/thirdfile $ exec 4>/tmp/fourthfile $ echo drib >&3 $ echo drab >&4 $ echo another drib >&3 $ echo another drab >&4 $ exec 3>&- $ exec 4>&- How can I see the file handles, something like with lsof -l ? 回答1: I don't understand, why not just use lsof: lsof -p $$ $$ being a shell variable that holds the shell's process ID You can also limit to just file descriptors like: lsof -a -d0-65535 -p $$ 回答2: On Linux, you can do something like ls -l /proc/$$/fd ,