As @stefan said using fopen() with “w” mode will do the job for you. When you open a file with “w” flag it creates an empty file for writing. If a file with the same name already exists its contents are erased and the file is treated as an empty new file. If the file … Read more
I would implement something like George’s answer, but as an extension method that avoids loading the whole file at once (not tested, but something like this): static class ExtensionsForTextReader { public static IEnumerable<string> ReadLines (this TextReader reader, char delimiter) { List<char> chars = new List<char> (); while (reader.Peek() >= 0) { char c = (char)reader.Read … Read more
os.rename(), os.replace(), or shutil.move() All employ the same syntax: import os import shutil os.rename(“path/to/current/file.foo”, “path/to/new/destination/for/file.foo”) os.replace(“path/to/current/file.foo”, “path/to/new/destination/for/file.foo”) shutil.move(“path/to/current/file.foo”, “path/to/new/destination/for/file.foo”) The filename (“file.foo”) must be included in both the source and destination arguments. If it differs between the two, the file will be renamed as well as moved. The directory within which the new file is … Read more
Your process is the one that has the file open (via im still existing). You need to close it first before deleting it. I don’t know if PIL supports with contexts, but if it did: import os from PIL import Image while True: img_dir = r”C:\Users\Harold\Google Drive\wallpapers” for filename in os.listdir(img_dir): filepath = os.path.join(img_dir, filename) … Read more
The assignment operator in Java evaluates to the assigned value (like it does in, e.g., c). So here, readLine() will be executed, and its return value stored in line. That stored value is then checked against null, and if it’s null then the loop will terminate.
http://en.cppreference.com/w/cpp/io/basic_ios/exceptions Also read this answer 11085151 which references this article // ios::exceptions #include <iostream> #include <fstream> using namespace std; void do_something_with(char ch) {} // Process the character int main () { ifstream file; file.exceptions ( ifstream::badbit ); // No need to check failbit try { file.open (“test.txt”); char ch; while (file.get(ch)) do_something_with(ch); // for line-oriented … Read more
I can’t find a duplicate of this for Python 3, which handles encodings differently from Python 2. So here’s the answer: instead of opening the file with the default encoding (which is ‘utf-8’), use ‘utf-8-sig’, which expects and strips off the UTF-8 Byte Order Mark, which is what shows up as . That is, instead … Read more
You can use std::getline : #include <fstream> #include <string> int main() { std::ifstream file(“Read.txt”); std::string str; while (std::getline(file, str)) { // Process str } } Also note that it’s better you just construct the file stream with the file names in it’s constructor rather than explicitly opening (same goes for closing, just let the destructor … Read more