It is time to share some insights. In fact, there is no necessity to **manually specify the index** of the symbol to find it in the string; it seems we have an intuition for this, as we recognize Python's user-friendly approach and attentiveness to its users.

Hence, the `find()` function was implemented.

> Note
>
> It will be beneficial to understand that this method is useful when we seek to determine the index of a particular symbol or word within a text. Additionally, it is important to note that this method returns the index of the first occurrence of the substring. In cases where the **substring is not found**, it returns a value of '-1'.

Take a look at the example; it will help you get the syntax:

string = "Channel efforts to success!"
print(string.find('n'))

import unittest
import sys
from io import StringIO


class TestUserCode(unittest.TestCase):
    def _test_variable_equals_string(self, var_name, expected):
        import user_code
        if not hasattr(user_code, var_name):
            return (False, f"Expected '{var_name}' variable to be defined.")
        var = getattr(user_code, var_name)
        if var != expected:
            return (False, f"Expected '{var_name}' to equal '{expected}', but got '{var}'.")
        return (True, f'The variable {var_name} equals "{expected}"')

    def test_p(self):
        passed, result_text = self._test_variable_equals_string(
            'p', 15)
        self._testMethodName = result_text
        self.assertTrue(passed, result_text)

    def test_y(self):
        passed, result_text = self._test_variable_equals_string(
            'y', 5)
        self._testMethodName = result_text
        self.assertTrue(passed, result_text)

    def test_r(self):
        passed, result_text = self._test_variable_equals_string(
            'r', 2)
        self._testMethodName = result_text
        self.assertTrue(passed, result_text)


if __name__ == '__main__':
    unittest.main()


test_main.py

This course is going to help you dive deeper into data types and try to work with them. Here you will learn basic operations and all ins and outs of numbers, boolean data type, and strings. This course consists of a lot of practical tasks after which you will become a skillful programmer.

Numeric data types are crucial in Python, so it is important to start with them. Here you will work with simple math operations and find out the purposes of learning different types of numerical data.

Mastering boolean data types and logical operations in Python. You'll learn how to work with True and False, apply logical operators like and, or, and not, and understand how operator precedence works in complex expressions.

Strings are an essential part of Python programming, allowing you to work with text data. In this section, you'll learn how to manipulate strings, extract characters, slice words, and search for specific phrases.

This chapter consists of practical tasks that combine all the examined topics together with a bit of theory.

Get the Index of the Symbol

Lösung

Get the Index of the Symbol

Lösung