Article Categories
- All Categories
-
Data Structure
-
Networking
-
RDBMS
-
Operating System
-
Java
-
MS Excel
-
iOS
-
HTML
-
CSS
-
Android
-
Python
-
C Programming
-
C++
-
C#
-
MongoDB
-
MySQL
-
Javascript
-
PHP
-
Economics & Finance
Python Articles
Page 834 of 855
Extracting MAC address using Python
We know that the MAC address is a hardware address which means it is unique for the network card installed on our PC. It is always unique that means no two devices on a local network could have the same MAC addresses. The main purpose of MAC address is to provide a unique hardware address or physical address for every node on a local area network (LAN) or other networks. A node means a point at which a computer or other device (e.g. a printer or router) will remain connected to the network. Method1 Using uuid.getnode() In this example getnode() ...
Read MoreString Operations in Pytho
In python, there is a standard library, called string. In the string module, there are different string related constants, methods, classes are available. To use these modules, we need to import the string module in our code. import string Some string constants and their corresponding values are as follows − Sr.No. String Constant & Values into it 1 string.ascii_lowercase'abcdefghijklmnopqrstuvwxyz' 2 string.ascii_uppercase'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 3 string.ascii_lettersConcatenation of asci_lowwecase and ascii_uppercase 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ' 4 string.digits'0123456789' 5 string.hexdigits'0123456789abcdefABCDEF' 6 string.octdigits'01234567' 7 string.punctuation'!"#$%&'()*+, -./:;?@[\]^_`{|}~' ...
Read MorePython Text Wrapping and Filling
In python the textwrap module is used to format and wrap plain texts. There are some options to format the texts by adjusting the line breaks in the input paragraph. To use these modules, we need to import the textwrap module in our code. import textwrap The Textwrapper instance attributes of the constructors are as follows − Sr.No. Attribute & Description 1 width The maximum length of lines. Default value is 70 2 expand_tabs If the value of this attribute is true, then all tabs will be replaced by spaces. Default value ...
Read MoreOperator Functions in Python
In Python there are some additional standard library methods for mathematical operations, like arithmetic, logical, relational, bitwise etc. operations. These methods can be found under the operator module. To use it at first we need to import it the operator standard library module. import operator In this section we will see some operator functions for bitwise operations and container operations. Arithmetic Operations At first we will see the arithmetic operating functions. These are like below. Sr.No Functions & Description 1 add(x, y) The add() method is used to add two numbers x and y. ...
Read MoreHandling missing keys in Python dictionaries
In Python there is one container called the Dictionary. In the dictionaries, we can map keys to its value. Using dictionary the values can be accessed in constant time. But when the given keys are not present, it may occur some errors. In this section we will see how to handle these kind of errors. If we are trying to access missing keys, it may return errors like this. Example code country_dict = {'India' : 'IN', 'Australia' : 'AU', 'Brazil' : 'BR'} print(country_dict['Australia']) print(country_dict['Canada']) # This will return error Output AU --------------------------------------------------------------------------- KeyErrorTraceback (most recent call last) ...
Read MoreAccess to the Group Database in Python
To access the UNIX group database, we should use the grp module. The shadow password database entries are like tuple like object.To use the grp module, we should import it using −import grpThe attributes of the grp database are −IndexAttribute & Description0gr_nameThe Name of the groups1gr_passwdThe Encrypted password for the group. (Generally empty)2gr_gidThe group id (Numeric)3gr_memA list of group usersIn the group object, the gid is an integer. The group name and the password are strings. The Member list is a list of strings.Some methods of this module are −Method grp.getgrgid(gid)This method will return group database entry from the given ...
Read MorePython Text Sequence Types
In python the str object, handles the text or string type data. Strings are immutable. The strings are sequence of Unicode characters. We can use single quote, double quotes or triple quotes to define the string literals. ‘This is a string with single quote’ “Another Text with double quotes” ‘’’Text using three single quotes’’’ or “””Text using three double quotes””” We can use triple quotes to assign multiline strings in python. There is different string related functions. Some of the String methods are as follows − Sr.No. Operation/Functions & Description 1 s.capitalize() Convert first ...
Read MoreRegex in Python to put spaces between words starting with capital letters
The problem we are trying to solve here is to convert CamelCase to separate out words. We can solve this directly using regexes by finding all occurrences of a capital letter in the given string and put a space before it. We can use the sub method from the re module.For example, for the input string −AReallyLongVariableNameInJavaWe should get the output −A Really Long Variable Name In JavaWe can use "[A-Z]" regex to find all uppercase letters, then replace them with space and that letter again. We can implement it using the re package as follows −Exampleimport re # ...
Read MoreHow to use *args and **kwargs in Python?
In Python, functions usually have a fixed number of arguments. However, there are situations where we may want to pass a variable number of arguments. In such cases, Python provides two special constructs: *args and **kwargs. *args allows a function to accept any number of positional arguments. **kwargs allows a function to accept any number of keyword arguments. We will discuss both of these concepts deeply in this article. What is "*args" in Python? In Python, *args allows a function to accept any number of positional arguments. These arguments are collected into a tuple inside the function, allowing ...
Read MoreHow to optimize the performance of Python regular expression?
Python provides a regular expression-specific built-in library named "re". You only need to import it to use its features (such as search, match, findall, etc.). They'll provide you back a Match object with helpful techniques for modifying your outcomes. According to Wikipedia, regular expressions (also known as regexp) are collections of characters that specify a search pattern. It is a tool that enables you to filter, extract, or alter a series of characters. It has also been discovered that regular expressions function more quickly when the "in" operator is used. Regular expressions have performance difficulties and are generally difficult to debug and maintain. ...
Read More