## Python math.exp() Method

Python math.exp() is a built-in function that calculates the value of any number with a power of e. This means e^n, where n is the given number. The value of e is approximately equal to 2.71828. Syntax math.exp(num) Arguments The function takes only one argument num, which we want to find exponential. Return Value The … Read more

## Python math.trunc() Method

Python math.trunc() method returns the truncated integer part of a number. For example, if the number is 3.14, the math.trunc() method will return 3. If the number is -1.23, the math.trunc() method will return -1. The syntax for the math.trunc() method is as follows: math.trunc(x) Parameters x : The number to be truncated. Return value The … Read more

## How to Use If, Else and Elif in Lambda Functions in Python

Python lambda function is defined without a name. Instead, the anonymous functions are defined using a lambda keyword. Syntax of Lambda function lambda arguments: expression The lambda functions can have any number of parameters but only one expression. That expression is evaluated and returned. Thus, lambda functions can be used wherever a function object is … Read more

## Python isinf() Method

Python isinf() is a built-in method that finds whether a number is infinite. It accepts a number (integer, float, NaN, inf) and checks whether it is infinite. Syntax math.isinf(n) The isinf() function takes n as an argument and checks whether n is infinite. Here n can be an integer, float, double, inf, NaN, etc. Return … Read more

## How to Remove Rows from DataFrame in Pandas

You can remove rows from a data frame using the following approaches. Method 1: Using the drop() method To remove single or multiple rows from a DataFrame in Pandas, you can use the drop() method by specifying the index labels of the rows you want to remove. import pandas as pd # Create a sample DataFrame … Read more

## How to Add Rows in Pandas DataFrame

There are the following methods to add rows in Pandas DataFrame. Method 1: Using the Dataframe.concat() method Method 2: Using the loc[ ] indexer Method 3: Using the insert() method Method 1: Using the Pandas Dataframe.concat() The concat() method can concatenate two or more DataFrames. For example, to add the row (‘new_row’, ‘value1’, ‘value2’) to … Read more

## How to Remove an Element From Dictionary in Python

To remove an element from the dictionary in Python, you can use the “del” statement or the “dict.pop()” method. Method 1: Using the “del” statement To remove an element from a dictionary using the del statement, “specify the key of the element you want to remove after the del keyword”. The element with the specified … Read more

## How to Print List of Files in Directory and Subdirectories in Python

To print a list of files in a directory and its subdirectories in Python, you can use the “os.walk()” function. The os.walk() function generates file names in a directory tree by walking the tree either top-down or bottom-up. Here’s a step-by-step guide on how to print a list of files in a directory and its … Read more

## Python Tuple count() Method

Python tuple count() is a built-in method that helps us calculate the occurrence of one element in the tuple and returns the counted number. It searches the given component of a tuple and returns how often the element has occurred in it. Syntax tuple.count(element) Return Value Python tuple count() method returns the number of occurrences … Read more

## How to Compare a String in Python

To compare a string in Python, you can use the “comparison operators” such as “==, !=, <, >, <=, and >=”. These operators allow you to check if two strings are equal, not equal, or if one string is lexicographically less than or greater than the other. Example 1 str1 = “hello” str2 = “world” … Read more

## How to Add to a Dictionary in Python

To add an element to a dictionary in Python, you can use the “dictionary[key] = value” expression. Example 1 disneyplus = { ‘name’: ‘Mandalorian’, ‘mvp’: ‘Baby Yoda’ } print(‘Before add’, disneyplus) disneyplus[‘season’] = 1 print(‘After add’, disneyplus) Output Before add {‘name’: ‘Mandalorian’, ‘mvp’: ‘Baby Yoda’} After add {‘name’: ‘Mandalorian’, ‘mvp’: ‘Baby Yoda’, ‘season’: 1} Example 2 … Read more