filehandle

问题 I am designing an image decoder and as a first step I tried to just copy the using c. i.e open the file, and write its contents to a new file. Below is the code that I used. while((c=getc(fp))!=EOF) fprintf(fp1,"%c",c); where fp is the source file and fp1 is the destination file. The program executes without any error, but the image file(".bmp") is not properly copied. I have observed that the size of the copied file is less and only 20% of the image is visible, all else is black. When I

问题 I am doing a lot of image processing in GDI+ in .NET in an ASP.NET application. I frequently find that Image.FromFile() is keeping a file handle open. Why is this? What is the best way to open an image without the file handle being retained. NB: I\'m not doing anything stupid like keeping the Image object lying around - and even if I was I woudlnt expect the file handle to be kept active 回答1: I went through the same journey as a few other posters on this thread. Things I noted: Using Image

问题 If you read an entire file with content = open(\'Path/to/file\', \'r\').read() is the file handle left open until the script exits? Is there a more concise method to read a whole file? 回答1: The answer to that question depends somewhat on the particular Python implementation. To understand what this is all about, pay particular attention to the actual file object. In your code, that object is mentioned only once, in an expression, and becomes inaccessible immediately after the read() call