Внутри строки мы можем указать как фиксированный текст, так и часть текста, определяемого функцией format, который будет состоять из отдельно задаваемых участков:
print(“This cat has {0} kittens and a {1}”.format(2,”tail”))
Вместо использования номеров внутри фигурных скобок можно в них сразу задать значение переменной – a,b,c:
print(‘quantity: ({a}, {b}, {c})’.format(a=5,b=2,c=4)) Читать
Как только вы установили на компьютер Python, лучше сразу позаботиться о небольших нюансах, которые облегают жизнь программистам. Давайте пройдемся по основным настройкам среды программирования и Windows для комфортной работы:
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Эта настройка позволит запускать программу, написанную на Python, в CMD операционной системы Windows (интерпретатор командной строки). Чтобы это сделать, нажимаем “Пуск” -> Изменение системных переменных среды: Читать
Once you’ve installed Python on your computer, it’s best to take care of the little nuances that make life easier for programmers. Let’s go through the basic settings of the programming environment and Windows for comfortable work:
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This setting will allow you to run a program written in Python in the CMD of the Windows operating system (command line interpreter). To do this, click “Start” -> Change system environment variables:
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We continue to learn the programming language. Let’s move on to chapter 4 of the book: Michael Dawson “Python Programming”, 2014 (Michael Dawson “Python Programming for the Absolute Beginner”, 3rd Edition), where we will study loops with the for () operator, introducing constants into code, slices and tuples, working with sequences on the example of strings with the operators len(), range(), in, jumble(), etc.
Summary of chapter 4 with examples of programs I wrote:
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for
We already know loops with the while statement, and have even done a lot of tasks. Remember, there is a control variable introduced before the loop, which is then used in the condition, which in turn is tested for truth every round of the loop. So with the for loop, things are a little different. Читать
The if statement (if) is used to set conditions (if so, then…), for example:
cat_say = ‘mew’
if cat_say = ‘mew’ of cat_say = ‘myavki’:
….print(‘Dear, cat! Here’s your food!’)
Important: when using if conditions, you need to write double equals and put a colon at the end of the expression to show the end of the condition; before the rest of the code related to the condition, and print is indented with a tab (or 4 spaces).
We continue to learn programming. After the second chapter in the book: Michael Dawson “We Program in Python”, 2014 (Michael Dawson “Python Programming for the Absolute Beginner”, 3rd Edition), where I studied the features of working with text in the Python programming language, tasks were offered. Let’s do them together. I will give my solution, and you write your options in the comments.
1) Come up with two lists: valid and invalid variable names. Explain why each of the names is valid or not valid, respectively. Then come up with two more lists—of “good” and “bad” valid names—and explain your choice.
Valid variable names: name, price, password, age, size (these can be any words that are not reserved in the programming language for functions / operators)