Found 27104 Articles for Server Side Programming

A string is a group of characters that can represent a single word or a complete sentence. In Python there is no need to declare variables explicitly using the datatype specifier you can directly assign them to a literal. Therefore, compared to other technologies like Java it is easy to use Python strings. For manipulating and accessing strings, Python includes a number of built in functions and methods. A string is an object of the String class, which has multiple methods because everything in Python is an object. In this article, we are going to find out how to check ... Read More

A string is a collection of characters that can represent a single word or an entire statement. Strings are simple to use in Python since they do not require explicit declaration and may be defined with or without a specifier. Python has various built in functions and methods for manipulating and accessing strings. Because everything in Python is an object, a string is an object of the String class with several methods. In this article, we are going to find out how to check if a string contains only upper case letters in python. Using the isupper() function One way ... Read More

A string is a group of letters that may be used to represent a single word or a whole statement. Strings are easy to use in Python since they don't need to be declared explicitly and may be defined with or without a specifier. For manipulating and accessing strings, Python includes several built in functions and methods. In Python string is an object of the class String. In this article, we will discuss how to check if a string contains only lower case letters in Python. There are multiple approaches to this. Using the islower() method One way to verify ... Read More

In this article, we are going to find out how to check if a Unicode string contains only numeric characters in Python. We will use the inbuilt function isnumeric() to check if there are only numeric characters present in a string. It is similar to isdigit() and isdecimal() but it has a wider range of acceptance. It returns true for numbers, superscripts, subscripts, Fractions, Roman Numerals, etc. We can also use isdigit() and isdecimal() but isnumeric() is more efficient than the other two. Example 1 In the example given below, we are taking a Unicode string as input and we ... Read More

In this article, we are going to find out how to check if a string contains only certain characters in Python. The first approach is by using sets. We will declare a set with all the characters that are acceptable and we will check if the input string is a subset of the acceptable characters, if it is a subset then we will print True otherwise print False. Similar to sets in mathematics, sets are a type of data structure in Python. The order of the elements in a set is arbitrary and it could contain a variety of them. ... Read More

To check if a Python string contains only digits, we can use the built-in isdigit() method. This method returns True if all the characters in the string are digits, and False otherwise. Here's an example code snippet that demonstrates how to use isdigit(): To check if a string contains only digits Example In this example, we first define a string called my_string that contains only digits. We then use the isdigit() method to check if my_string contains only digits. Since it does, the output will be "The string contains only digits!". my_string = "1234" if my_string.isdigit(): ... Read More

In this article, we are going to focus on how to check if a string is alphanumeric using Regular expressions in Python. Regular expressions are used in both the techniques. Import the re library and install it if it isn't already installed to use it. After importing the re library, we can use the regular expression "[a-zA-Z0-9]+$.". This will return False if the string contains any special characters other than Alphabets and Numbers; otherwise, True will be returned. Example 1 In the example given below, we are taking a string as input and checking if it is alphanumeric using Regular ... Read More

Strings are an array of characters that are used to represent a word or any sentence. Strings in Python can be easily used as it does not require any explicit declaration and can be declared without any specifier. Strings in python also have many inbuilt functions and methods to manipulate and access the strings. Since in python everything is an object even String is also an object of the String class and has many methods. In this article, we are going to find out if a given string has only alphabets and numbers without any special symbols using python. We ... Read More

In this article, we are going to find out how to verify a string that contains only letters, numbers, underscores, and dashes in Python. The first strategy makes use of regular expressions. To use the re library, import it and install it if it isn't already installed. We use the regular expression "^[A-Za-z0-9_-]*$" after importing the re library. If the string contains any special characters other than Alphabets and Numbers, this will return False; otherwise, True will be returned. Example 1 In the example given below, we are taking a string as input and we are checking if it contains ... Read More

In this article, we are going to find out how to check if a string has at least one letter and one number in Python. Regular expressions is used in the first technique. Import the re library and install it if it isn't already installed to use it. After importing the re library, we can use the regular expression ('^(?=.*[0-9]$)(?=.*[a-zA-Z])'. This will return False if the string contains any special characters other than Alphabets and Numbers; otherwise, True will be returned. In regular expressions, the ?= syntax is used to call lookaheads. Lookaheads discover matches in the provided string by ... Read More