Gain insights into Python by exploring basic to advanced concepts, including loops, classes, and GUIs with Tkinter. Delve into testing and become a productive Python programmer.

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In this course, you will get a comprehensive overview of Python. You will start by laying the foundation and learning the introductory topics like operators, conditional statements, functions, loops, assignment statements, and more. You will then move onto more advanced topics such as classes and inheritance, iterators, list comprehensions, and dictionaries. Along with this, you will also get to explore the concept of testing and take a look at how GUI applications can be designed using Tkinter, Python's standard GUI library. 

By the time you're done, you'll be able to hit the ground running and be equipped with the tools that will allow you to be productive in Python.

Python 3: From Beginner to Advanced

# Introduction to `__str__` method

The `print` method takes any number of arguments, converts each argument into a string by calling its `__str__` method, and  prints them. As with `__init__`, that’s two underscores before
and after the name.

All classes have a `__str__` method inherited from `object`. It is a good idea to override this method. If you don’t, your objects will print something like this:

```python
<__main__.Friend object at 0x1064728d0>
```

In the case of a `Friend` object, your method might look something like this:

```python
def __str__(self):
 return self.name + "'s age is " + str(self.age)
```
`print(meg)` would result in `Margaret's age is 25`.

In the above example, Margret’s age is an integer, and we can’t add an integer to a string. Therefore, we had to explicitly convert her age to a string by calling the function `str(self.age)`. Once you’ve defined the `__str__` method in your class, you can call the `str function` on objects of that class, by saying `str(meg)` for example.

> **Technical note**: Yes, you define the `__str__` method, then use it by calling the `str function`. 

You can observe this in the example below:

In this lesson, you'll learn how to print objects in Python. 

Introduction

The Absolute Bare Minimum

Better Tools

Classes

Getting Fancy

Testing

Graphical User Interfaces

Modules

Appendix

I Guess We're Doing Python Now Exam

Printing Objects

Introduction to `str` method

I Guess We're Doing Python Now Exam

Printing Objects

Introduction to __str__ method

Introduction to `str` method