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Python Articles
Page 829 of 852
Program to reverse an array up to a given position in Python
In this tutorial, we will learn how to reverse an array upto a given position. Let's see the problem statement.We have an array of integers and a number n. Our goal is to reverse the elements of the array from the 0th index to (n-1)th index. For example, Input array = [1, 2, 3, 4, 5, 6, 7, 8, 9] n = 5 Output [5, 4, 3, 2, 1, 6, 7, 8, 9]Procedure to achieve the goal. Initialize an array and a number Loop until n / 2. Swap the (i)th index and (n-i-1)th elements.Print the array you will get the result.Example## initializing array and ...
Read MorePython program to remove leading zeros from an IP address
In this tutorial, we are going to write a program which removes leading zeros from the Ip address. Let's see what is exactly is. Let's say we have an IP address 255.001.040.001, then we have to convert it into 255.1.40.1. Follow the below procedure to write the program.Initialize the IP address.Split the IP address with. using the split functionConvert each part of the IP address to int which removes the leading zeros.Join all the parts by converting each piece to str.The result is our final output.Example## initializing IP address ip_address = "255.001.040.001" ## spliting using the split() functions parts = ip_address.split(".") ## ...
Read MorePython program to merge two Dictionaries
In this tutorial, we are going to learn how to combine two dictionaries in Python. Let's see some ways to merge two dictionaries.update() methodFirst, we will see the inbuilt method of dictionary update() to merge. The update() method returns None object and combines two dictionaries into one. Let's see the program.Example## initializing the dictionaries fruits = {"apple": 2, "orange" : 3, "tangerine": 5} dry_fruits = {"cashew": 3, "almond": 4, "pistachio": 6} ## updating the fruits dictionary fruits.update(dry_fruits) ## printing the fruits dictionary ## it contains both the key: value pairs print(fruits)If you run the above program, Output{'apple': 2, 'orange': 3, ...
Read MorePython program to find all close matches of input string from a list
In this tutorial, we are going to find a solution to a problem. Let's see what the problem is. We have a list of strings and an element. We have to find strings from a list in which they must closely match to the given element. See the example.Inputs strings = ["Lion", "Li", "Tiger", "Tig"] element = "Lion" Ouput Lion LiWe can achieve this by using the startswith built-in method. See the steps to find the strings.Initialize string list and a string.Loop through the list.If string from list startswith element or element startswith the string from the listPrint the stringExample## initializing ...
Read MoreProgram to check if all the values in a list that are greater than a given value in Python
In this tutorial, we will check whether all the elements in a list are greater than a number or not. For example, we have a list [1, 2, 3, 4, 5] and a number 0. If every value in the list is greater than the given value then, we return True else False.It's a simple program. We write it in less than 3 minutes. Try it yourself first. If you are not able to find the solution, then, follow the below steps to write the program.Initialise a list and any numberLoop through the list.If yes, return **False**Return True.Example## initializing the list values ...
Read MoreFilter in Python
We sometimes arrive at a situation where we have two lists and we want to check whether each item from the smaller list is present in the bigger list or not. In such case we use the filter() function as discussed below.SyntaxFilter(function_name, sequence name)Here Function_name is the name of the function which has the filter criteria. Sequence name is the sequence which has elements that needs to be filtered. It can be sets, lists, tuples, or other iterators.ExampleIn the below example we take a bigger list of some month names and then filter out those months which does not have ...
Read MoreChange Data Type for one or more columns in Pandas Dataframe
Many times we may need to convert the data types of one or more columns in a pandas data frame to accommodate certain needs of calculations. There are some in-built functions or methods available in pandas which can achieve this.Using astype()The astype() method we can impose a new data type to an existing column or all columns of a pandas data frame. In the below example we convert all the existing columns to string data type.Example Live Demoimport pandas as pd #Sample dataframe df = pd.DataFrame({ 'DayNo': [1, 2, 3, 4, 5, 6, 7], 'Name': ['Sun', 'Mon', 'Tue', 'Wed', ...
Read MoreCalculate n + nn + nnn + ? + n(m times) in Python
There are a variety of mathematical series which python can handle gracefully. One such series is a series of repeated digits. Here we take a digit and add it to the next number which has two such digits and again the next number is three such digits and so on. Finally, we calculate the sum of all such numbers in the series.ApproachWe take a digit and convert it to string. Then concatenate two such strings to get the double digit number and keep concatenating to get higher numbers of such digits. Then we implement a recursive function to add all ...
Read Morehowdoi in Python
Create a Python ListExampleC:\Py3Project>howdoi create a python listOutputRunning the above code gives us the following result −>>> l = [None] * 10 >>> l [None, None, None, None, None, None, None, None, None, None]Printing Today’s DateExamplec:\python3>howdoi print today's date in pythonOutputRunning the above code gives us the following result −for date in mylist : print str(date)Examplec:\python3>howdoi create fibonnaci series in pythonOutputRunning the above code gives us the following result −def F(n): if n == 0: return 0 elif n == 1: return 1 else: return F(n-1)+F(n-2)Examplec:\python3>howdoi use calendar in javascriptOutputRunning the above code gives us the following ...
Read MoreHow to print without newline in Python?
In python the print statement adds a new line character by default. So when we have multiple print statements the output from each of them is printed in multiple lines as you can see in the example below. Our goal is to print them in a single line and use some special parameters to the print function to achieve that.Normal Print()The below example prints multiple statements with new lines in each of them.Exampleprint("Apple") print("Mango") print("Banana")OutputRunning the above code gives us the following result −Apple Mango BananaUsing end ParameterWe can use the end parameter to use a specific character at the ...
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