Methods in Python
In Python, a method is a function that belongs to an object. Methods can be called on an object of a certain type and can perform operations on that object or return information about it.
There are many built-in methods in Python, as well as methods that can be defined by the programmer. Here are some examples of built-in methods:
len() - returns the number of elements in an object such as a string, list, or tuple.
append() - adds an element to the end of a list.
split() - splits a string into a list of substrings based on a specified delimiter.
upper() - returns a string with all characters converted to uppercase.
lower() - returns a string with all characters converted to lowercase.
strip() - removes leading and trailing whitespace characters from a string.
To call a method on an object, you use the dot notation. For example, to call the upper() method on a string object, you would write:
python
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my_string = "hello"
my_string_upper = my_string.upper()
print(my_string_upper) # prints "HELLO"
To define a method for a custom object, you can define a function inside the class definition. Here's an example of a simple class with a method:
class Person:
def __init__(self, name):
self.name = name
def greet(self):
print(f"Hello, my name is {self.name}.")
person = Person("Alice")
person.greet() # prints "Hello, my name is Alice."
In this example, the Person class has a method called greet() that takes no arguments and prints a greeting message that includes the person's name. The greet() method can be called on a Person object, as shown above.
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Видео Methods in Python автора PythonRevolution
Видео Methods in Python автора PythonRevolution
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2 декабря 2023 г. 9:43:44
00:02:48
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