Python Articles - Page 221 of 929

To convert a string to a number, there are various ways. Let’s see them one by one. Convert a string to number using int() Example In this example, we will convert a string to a number using the int() method − # String to be converted myStr = "200" # Display the string and it's type print("String = ", myStr) print("Type= ", type(myStr)) # Convert the string to integer using int() and display the type myInt = int(myStr) print("Integer = ", myInt) print("Type = ", type(myInt)) Output String = 200 Type= Integer = ... Read More

Resources for any programming language includes Video Courses, Notes as well as E-books. Here, I will list the best resources of Python. Python Official Documentation A lot of websites are providing Python resources, but the official documentation still works the best. Let’s see the resources provided by them. Beginners Guide To Python − https://wiki.python.org/moin/BeginnersGuide Developer’s Guide To Python − https://devguide.python.org/ Free Python Books − https://wiki.python.org/moin/PythonBooks Python Standard Library − https://docs.python.org/3/library/index.html HOWTOs on Python −https://docs.python.org/3/howto/index.html Latest Talks on Python −https://pyvideo.org/ Python Resources Now, let us talk about the Python Resources except the official documentation. Following are some of ... Read More

Separate tuple and list data types are provided because both have different roles. Tuples are immutable, whereas lists are mutable. That means Lists can be modified, whereas Tuple cannot. Tuples are sequences, just like lists. The differences between tuples and lists are, the tuples cannot be changed unlike lists and tuples use parentheses, whereas lists use square brackets. Let’s see how Lists and Tuples are created. Creating a Basic Tuple We will begin the code by creating a basic tuple with integer elements. Next, specify the topics as advanced concepts like tuples nested within tuples. The provided code initializes a ... Read More

To find the attributes of an object, use the getarr() method in Python. To check if an attribute exist or not, use the hasattr() method. Set an attribute using the setattr() method in Python. Access the attributes of an object Example To access the attributes of an object, we will use the getattr() method in Python − class student: st_name ='Amit' st_age ='18' st_marks = '99' def demo(self): print(self.st_name) print(self.st_age) ... Read More

We can sort a list by values from another list by setting up the 2nd list as index numbers for the values in the 1st List in sorted order. Sort a List by values from another list Example In this example, we will sort a list by values from another list i.e. the 2nd list will have the index in the order in which they are placed in sorted order − # Two Lists list1 = ['BMW', 'Toyota', 'Audi', 'Tesla', 'Hyundai'] list2 = [2, 5, 1, 4, 3] print("List1 = ", list1) print("List2 (indexes) = ", list2) # ... Read More

Multidimensional Lists are Lists within Lists. The left index as row number and right index as column number, for example list[r][c] Above, r is row number and c is column number. Let’s see an example. For multidimensional list 2x3 − list [2][3] Create a Multidimensional Python List Example In this example, we will learn how to create a Multidimensional List in Python. We will also iterate and print the array. # Create a Multi-Dimensional Python List mylist = [[2, 5], [10, 24, 68], [80]] print("Multidimensional List") for outList in mylist: print(outList) Output Multidimensional List ... Read More

To remove more than one item from a list, we can use various ways as discussed in this article. Let’s say have the following input List − ["David", "Jacob", "Harry", "Mark", "Anthony", "Steve", "Chris"] Following is the output when multiple elements “David” and “Harry” are removed − ["Jacob", "Mark", "Anthony", "Steve", "Chris"] Remove multiple items from a List Example To remove multiple items from a List, use the del keyword. The del allows you to add the items you want to delete in a range using square brackets: # Creating a List mylist = ["David", "Jacob", "Harry", "Mark", ... Read More

To remove duplicates from a List in Python, we can use various ways as discussed in this article. Remove duplicates from a list using Dictionary Example In this example, we will remove duplicates from a list using OrderedDict − from collections import OrderedDict # Creating a List with duplicate items mylist = ["Jacob", "Harry", "Mark", "Anthony", "Harry", "Anthony"] # Displaying the List print("List = ", mylist) # Remove duplicates from a list using dictionary resList = OrderedDict.fromkeys(mylist) # Display the List after removing duplicates print("Updated List = ", list(resList)) Output List = ['Jacob', 'Harry', ... Read More

Python Sequences includes Strings, Lists, Tuples, etc. We can merge elements of a Python sequence using different ways. Let’s see some examples of iteration over a List in reverse order. Iterate in Reverse Order using while loop Example In this example, we have a List as a sequence and iterate it in reverse order using the while loop − # Creating a List mylist = ["Jacob", "Harry", "Mark", "Anthony"] # Displaying the List print("List = ", mylist) # Length - 1 i = len(mylist) - 1 # Iterate in reverse order print("Display the List in Reverse order ... Read More

Negative Indexing is used to in Python to begin slicing from the end of the string i.e. the last. Slicing in Python gets a sub-string from a string. The slicing range is set as parameters i.e. start, stop, and step. Syntax Let us see the syntax − #slicing from index start to index stop-1 arr[start:stop] # slicing from index start to the end arr[start:] # slicing from the beginning to index stop - 1 arr[:stop] # slicing from the index start to index stop, by skipping step arr[start:stop:step] If the values above are in negative, that ... Read More