Search results
Results from the WOW.Com Content Network
Similarly, the Python language has a with statement that can be used to similar effect with a context manager object. The context manager protocol requires implementing __enter__ and __exit__ methods which get automatically called by the with statement construct, to prevent duplication of code that would otherwise occur with the try/finally ...
Programs and devices may automatically assign names to files such as a numerical counter (for example IMG_0001.JPG) or a time stamp with the current date and time.. The benefit of a time stamped file name is that it facilitates searching files by date, given that file managers usually feature file searching by name.
The term closure is often used as a synonym for anonymous function, though strictly, an anonymous function is a function literal without a name, while a closure is an instance of a function, a value, whose non-local variables have been bound either to values or to storage locations (depending on the language; see the lexical environment section below).
For most file systems, a program terminates access to a file in a filesystem using the close system call. This flushes file buffers, updates file metadata , which may include and end-of-file indicator in the data; de-allocates resources associated with the file (including the file descriptor ) and updates the system wide table of files in use.
A file name, or filename, identifies a file to consuming applications and in some cases users. A file name is unique so that an application can refer to exactly one file for a particular name. If the file system supports directories, then generally file name uniqueness is enforced within the context of each directory.
Python is known as a glue language, [76] able to work very well with many other languages with ease of access. Python uses dynamic typing and a combination of reference counting and a cycle-detecting garbage collector for memory management. [77] It uses dynamic name resolution (late binding), which binds method and variable names during program ...
Then we start typing the file name: firefox i But this time introduction-to-command-line-completion.html is not the only file in the current directory that starts with "i". The directory also contains files introduction-to-bash.html and introduction-to-firefox.html. The system can't decide which of these filenames we wanted to type, but it does ...
The use of a filename extension in a command name appears occasionally, usually as a side effect of the command having been implemented as a script, e.g., for the Bourne shell or for Python, and the interpreter name being suffixed to the command name, a practice common on systems that rely on associations between filename extension and ...