Programming Articles - Page 3329 of 3363

Changing the ownership of a file is to transfer the file's ownership from one user to another. This is mainly to specify who has control over modifying, deleting, or setting permissions for the file. Before you change the ownership of a file, make sure you have administrative privileges, and the methods discussed below only work on Linux.To change the ownership of a file from one user to another in Python, we can use the following ways - Using os.chown() Method The os.chown() method is used to change the owner and group ID of a file. To this method, we need to ... Read More

The System class of java.lang package provides a method named getProperty() this method accepts one of the following string parameters an returns the respective property. java.class.path − If you pass this value as a parameter, the getProperty() method returns the current classpath. java.home − If you pass this value as a parameter, the getProperty() method returns the current Installation directory of the JRE. java.vendor − If you pass this value as a parameter, the getProperty() method returns the current vendor name of the JRE. java.vendor.url − If you pass this value as a parameter, the getProperty() method returns the ... Read More

IntelliJ and NetBeans are the alternative IDE’s for Java development.

Many of us have a misconception that Java script is an object oriented language. But, the truth is Java Script is an Object Based Language. Object Based languages are different from Object Oriented Languages: Object Based Languages Object based languages supports the usage of object and encapsulation. They does not support inheritance or, polymorphism or, both. Object based languages does not supports built-in objects. Javascript, VB are the examples of object bases languages. Object Oriented Languages Object Oriented Languages supports all the features of Oops including inheritance and polymorphism. They support built-in objects. C#, Java, VB. Net ... Read More

In fact, you can directly start learning Java without any prior knowledge of programming language. But, the syntax in Java is similar to the syntax of the C programming language, therefore, Knowing C language helps to get hold of Java quickly. Having introduced to object-oriented principles before starting Java, also helps in the understanding of the language so, having an idea on object-oriented languages such as C++ also helps. In short, if you know C or C++ it will be a little bit easier to cope with Java technology.

Python makes it simple to create new files, read existing files, append data, or replace data in existing files. With the aid of a few open-source and third-party libraries, it can manage practically all of the file types that are currently supported. We must iterate through all the necessary files, collect their data, and then add it to a new file in order to concatenate several files into a single file. This article demonstrates how to use Python to concatenate multiple files into a single file. Using Loops A list of filenames or file paths to the necessary python files ... Read More

You might wish to perform a specific action in a Python script only if a file or directory is present or not. For instance, you might wish to read from or write to a configuration file, or only create the file if it doesn't already exist There are many different ways to check if a file exists and figure out what kind of file it is in Python. Using OS Module An inbuilt Python module called Os has tools for dealing with the operating system. We can access operating system features by using os. In Python, os.path is a sub-module ... Read More

By utilising the pwd, grp, and os modules, you can modify the owner of a file or directory. To obtain the user ID from the user name, to obtain the group ID from the group name string, and to modify the owner, one uses the uid module. Following are the methods to change the owner of a directory using Python − Using os.chown() Method To change the owner and group id of the given path to the specified numeric owner id (UID) and group id(GID), use Python's os.chown() method. Syntax os.chown(filepath, uid, gid, *, dir_fd = None, follow_symlinks = True) ... Read More

In Python, Modifying the permission of a directory can be done using the subprocess module and, the chmod() Function ( of the os module). Using 'subprocess' Module The subprocess module in Python provides various functions to create a new (child) process and establish a connection to the I/O devices. This module has a function named call(),   This function helps us to run the shell commands of the underlying Operating system. You just need to pass the respective command with the desired options (in the recommended order). For example, the command to set permissions read-write permissions to a user in the Unix ... Read More

The user whose actions are allowed on a file are governed by its file permissions. A file's permissions for reading, writing, and executing are modified when the file's permissions are changed. This article will cover how to change a file's permission in Python. Using os.chmod() Method To modify the permissions of a file, use the os.chmod () method. Syntax Following is the syntax for os.chmod() method − os.chmod(path, mode) Where, path represents the path of the file and mode contains different values as explained below. There is no return value obtained in this method. Os.chmod() modes Following are the ... Read More