Server Side Programming Articles - Page 2604 of 2650

In Python, string comparisons are case-sensitive by default. For example, when we consider the strings "Hello" and "hello" then they are considered as two different strings because of the difference in their letter casing.  Case-insensitive String Comparison in Python In some tasks, such as searching user input, comparing filenames, or processing natural language, it's important to compare strings without considering case differences. To perform string comparison in Python, we have several built-in methods such as lower(), upper(), and casefold(), which help us to normalize the casing of strings before comparing them. ... Read More

File manipulation is a fundamental aspect of programming, especially when dealing with data processing and management. Python offers powerful tools for handling files and text efficiently. A common task is searching for specific text patterns within a file and replacing them with desired content. This article explores several practical methods for searching and replacing text in a file using Python. Basic Text Replacement Let's start with a simple example of searching for a specific word in a file and replacing it with another word. In this particular example, we'll search for the word "old" and replace it with "new" − ... Read More

In C, ++ and -- operators are called increment and decrement operators. They are unary operators needing only one operand. Hence ++ as well as -- operator can appear before or after the operand with same effect. That means both i++ and ++i will be equivalent.i=5; i++; printf("%d", i);and i=5 ++i; printf("%d", i);both will make i=6.However, when increment expression is used along with assignment operator, then operator precedence will come into picture. i=5; j=i++;In this case, precedence of = is higher than postfix ++. So, value of i is assigned to i before incrementing i. Here j becomes 5 and i becomes 6.i=5; ... Read More

In Python, Regular expressions are also called RegEx, which is a sequence of characters that defines a search pattern. The re module provides several functions to work with patterns in text. This is widely used in Python tasks such as string matching, validation, and manipulation. The most commonly used functions in the "re" module are re.match() and re.search(). These two methods are used to check for the presence of a pattern, but they differ in the way they look for a pattern match within a string. In this article, we are going to see the difference between the Python re.search() ... Read More

When we are working with string data in Python, it's sometimed necessary to check if certain patterns appear in a string. Python's re module contains many methods which are used for pattern matching in the given strings using regular expressions. What is match() function? The match() function in re module is used in the scenarios such as validating structured input, checking prefixes or extracting information from well-defined formats such as phone numbers or dates. Syntax Following is the syntax of using the match() function in Python - re.match(pattern, string, flags=0) Where, pattern: The regular ... Read More

SSH is referred as secure shell which is useful to remotely manage computers in a secure manner. To connect to a server, we typically use PuTTy, MobaXTerm or the command-line ssh application. Every Unix, Linux and Mac server includes SSH as standard equipment and it is usable in every data centre. SSH connections have made it feasible for secure remote access to resources, remote command execution, the transmission of software patches and updates and other administrative or management tasks. SSH is used in systems administration and file transfer software as well as to handle routers, server hardware, virtualization platforms and ... Read More

When we want to remotely access and execute commands on another machine then we use the paramiko library in Python. Paramiko is a third-party library that is used to connect and communicate securely with remote machines using the SSH, i.e., Secure Shell protocol. It allows us to execute commands, transfer files, and perform other remote tasks programmatically. To use the Paramiko library, first we need to install it in our local system using the below command - pip install paramiko Example Following is the example, in which we connect to a remote server via SSH and perform multiple shell ... Read More

In Python we can use FTP (File Transfer Protocol) by importing the ftplib module, it will provide a simple interface to access FTP servers to retrieve files and process them locally. ftplib module allows us to write Python programs that perform a variety of automated FTP tasks. Objectives of FTP The objectives of FTP are as follows FTP provides file sharing. FTP helps us to encourage the use of remote computers. FTP is used to transfer the data reliably and efficiently. Some Common tasks we can perform using FTP in Python by utilizing the 'ftplib' module are as follows: ... Read More

When we want to transfer files from our local system to a remote server securely, Python provides possible ways to do the file transfer using the Paramiko and SCP libraries. These libraries support SSH-based file transfer, which is secure and reliable. Installing Required Libraries Before we start with file transfer, we need to install all the required libraries with the help of below commands - pip install paramiko scp Using paramiko and SCP/SSH Paramiko is a third-party library available in Python, which is used to transfer a file to a remote server without using an external SCP module. This ... Read More

Transferring files from one server to another is a most common task in system administration, DevOps and development workflows. The tools such as scp and rsync are used for the file transfer. Python provides different methods and tools to transfer the files from one server to another using a third party libraries such as paramiko and SCPClient. Using Paramiko and SCP for Secure Transfers When we want to copy files securely from one server to another using Python, we can use the libraries Paramiko and SCPClient together. Paramiko is a Python library that helps to implement SSHv2 protocol. This is ... Read More