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Articles by SaiKrishna Tavva
Page 8 of 8
How to pass a json object as a parameter to a python function?
We can pass a JSON object as a parameter to a Python function using the json.loads() method. we can also convert the JSON string into a Python dictionary or list, which depends on its structure. Once converted, the data can be used just like any other dictionary or list in Python. JSON Object Consider a JSON object to pass to a python function. We will use it further in this article - { "name":"Rupert", "age": 25, "desig":"developer" } Using json.loads() Function Before passing a JSON object as a parameter ...
Read MoreHow can you execute functions with multiple arguments at a terminal?
In Python, you can execute functions with multiple arguments directly from the terminal using different approaches depending on how your function is defined and how you want to provide the arguments. Executing Python functions from the terminal allows you to quickly test or run code without writing a full script. When a function requires multiple arguments, you can pass them manually, use input prompts, or use command-line arguments with the help of modules like sys or argparse. Using the Python Interactive Shell If you are working in the Python interactive shell, you can define and call functions directly by entering ...
Read MoreHow can I find all matches to a regular expression in Python?
To find all matches to a regular expression in Python, you can use the re module, which provides regular expression matching operations. Here are a few methods to find all matches to regular expressions. Using re.findall(pattern, string) Using re.finditer(pattern, string) re.compile combined with findall or finditer Using re.findall(pattern, string) The re.findall() method finds all non-overlapping matches of the pattern in the string and returns them as a list of strings. This method returns a list of strings. If the pattern contains capturing groups, it returns ...
Read MoreWhat is the difference between re.match(), re.search() and re.findall() methods in Python?
Python's re module is useful while working with Regular Expressions, allowing us to search, match and manipulate strings by following specific patterns. re.match(): Checks if a given pattern matches at the beginning of a string. If a match is found, it returns a match object. re.search(): Scans the entire string for the first occurrence of the specified pattern. If it finds a match, it returns a match object. re.findall(): Finds all occurrences of a pattern within the string and returns them as a list. The re.match() ...
Read MoreWhat is the difference between CHAR and NCHAR in MySQL?
In MySQL, both CHAR and NCHAR are ASCII character data types used for storing text data, but they differ significantly in terms of storage, data representation, and performance. CHAR and NCHAR columns can have different collations, determining how strings are compared and sorted. The CHAR type typically uses the collation associated with its specified character set. On the other hand, NCHAR is intended for Unicode data and typically uses a collation that can handle Unicode characters, ensuring proper sorting and comparison. Understanding 'CHAR' in MySQL The CHAR data type is primarily used to store ASCII character data. It is a ...
Read MoreUnix style pathname pattern expansion in Python (glob)
When working with files in Python, you often need to iterate through a list of files that match specific patterns. The 'glob' module provides a convenient way to accomplish this by using Unix-style pathname pattern expansion. It allows you to search for files based on their names, including wildcards, making managing files in your directory easier. Overview of the glob Module The glob module primarily offers three functions: glob(): Returns a list of files that match the specified pattern. iglob(): Returns an iterator (generator) for the matching files, which can be ...
Read MoreHow will you compare namespaces in Python and C++?
Namespaces help in organizing code, managing the scope of variables and preventing naming conflicts. Python and C++ use namespaces, but they do so in different ways. Below is an overview of namespaces in both. Namespaces in C++ In C++, namespaces are created using the keyword 'namespace'. They are mainly intended to organize code into logical groups and avoid name conflicts, particularly when working with multiple libraries. Example In the following example we are going to how to use a namespace by utilizing '::' to access functions within that namespace. #include using namespace std; // first namespace namespace first_space ...
Read MoreHow do we use re.finditer() method in Python regular expression?
The re.finditer() method in Python's 're' module finds all occurrences of a specified pattern in a string. It returns an iterator containing match objects for each occurrence. This method is especially useful when you need to determine the position of each match within the input string. Following is the syntax for re.finditer() method. re.finditer(pattern, string, flags=0) How to Use 're.finditer()' Method Following are the steps involved in using re.finditer() method. Import the re module: You need to import the regular expression module before using it. ...
Read MoreGenerate pseudo-random numbers in Python
Many computer applications need random numbers to be generated. However, none of them generate an actual random number. Python, like any other programming language, uses a pseudo-random generator. Python’s random generation is based on the Mersenne Twister algorithm that produces 53-bit precision floats. The technique is fast and thread-safe but not suitable for cryptographic purposes. Python’s standard library contains the random module which defines various functions for handling randomization. The following functions handle random integer number generation. random.seed() − This function initializes the random number generator. ...
Read MoreHow to click on a link in Selenium with python?
We can click on a link on page with the help of locators available in Selenium. Link text and partial link text are the locators generally used for clicking links. Both these locators work with the text available inside the anchor tags. Link Text: In Selenium a link text is used to hyperlinks on a web page, to create the hyperlinks on a webpage, we can use anchor tag followed by link Text. ...
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