Python Articles - Page 965 of 1048

In Python, dictionaries are used to store data as key-value pairs, and lists store a collection of items separated by commas. To map two lists into a dictionary, we have various methods in Python that we will explore in this article. Mapping two lists into a Dictionary Mapping two lists into a dictionary can be done using the following methods - Using a Loop Using a Zip and Dict Method Using Dictionary Comprehension Using a Loop For loops are used to iterate ... Read More

There are two ways available to access value associated with a key in a dictionary collection object. The dictionary class method get() takes key as argument and returns value. >>> d1 = {'name': 'Ravi', 'age': 23, 'marks': 56} >>> d1.get('age') 23 Another way is to use key inside square brackets in front of dictionary object >>> d1 = {'name': 'Ravi', 'age': 23, 'marks': 56} >>> d1['age'] 23

In Python, objects are instances of classes containing attributes and methods, while dictionaries are collections of key-value pairs. We can obtain a dictionary from an object's fields - Using __dict__ Using vars() Using __dict__ You can access an object's attributes as a dictionary using its _dict_ attribute. In Python, every object has a _dict_ attribute that stores the object's attributes and their values as a dictionary (key-value pairs). Example In this example, we have defined a class Company with attributes Companyname and Location, and created ... Read More

In this article, we will show you how to convert a python dictionary to a list. Below are the methods to accomplish this task: Using list & items() Method Using keys() Method Using values() Method Using List Comprehension Using Zip() Function Using map() Function Using for loop & items() Method Dictionaries are Python's version of an associative array data structure. A dictionary is a collection of key-value pairs. Each key pair is represented by a key pair and its associated value. A dictionary is defined by a list of key-value pairs enclosed in curly braces and ... Read More

The loop control statement continue abandons the pending statements in current iteration of the looping block and starts next iteration. The continue statement appears in a conditional block inside loopExamplex=0 while x

Infinite loop is the one that doesn't stop on its own. It happens when the looping condition continues to remain true forever. In such a case, the loop must be forcibly stopped by pressing ctrl-C to generate keyboard interrupt

In python the while loop needs to be controlled by making some provision inside the body of the loop to drive the condition mentioned in the beginning to false. This is usually done by keeping count of iterations. If the while loop condition never evaluates to False, then we will have an infinite loop, which is a loop that never stops automatically, in this case we need to interrupt externally. count=0 while condition: stmt1 stmt2 . . count=count+1 Example Let’s take an example and ... Read More

Python dictionary is collection of key value pairs. Value associated with a certain key is returned by get() method.>>> D1={'a':11,'b':22,'c':33} >>> D1.get('b') 22You can also obtain value by using key inside square brackets.>>> D1['c'] 33

In python there are two number data types: integers and floats. In general integers do not have any decimal points and base value is 10 (i.e., Decimal). Whereas floats have decimal points. Python provides some built−in methods to convert floats to integers. In this article we will discuss some of them. Using the int() function The int() function converts the floating point numbers to integers, by removing the decimals and remains only the integer part. Also the int() function does not round the float values like 49.8 up to 50. Example In the example the data after the decimal ... Read More

To convert an integer to a character in Python, we can use the chr() method. The chr() is a Python built−in method that returns a character from an integer. The method takes an integer value and returns a unicode character corresponding to that integer. Syntax char(number) Parameter The method takes a single integer between the range of 0 to 1, 114, 111. Return Value A unicode character of the corresponding integer argument. And it will raies a ValueError if we pass an out of range value (i, e. range(0x110000)). Also it will raise TypeError − for a non−integer argument. ... Read More