Typeerror str object cannot be interpreted as an integer python ошибка

Что означает ошибка TypeError: ‘list’ object cannot be interpreted as an integer

Ситуация: мы пишем на Python программу для ветеринарной клиники, и у нас есть список животных, которых мы лечим:

animals = [‘собака’, ‘кошка’, ‘попугай’, ‘хомяк’, ‘морская свинка’]

Нам нужно вывести список всех этих животных на экран, поэтому будем использовать цикл. Мы помним, что для организации циклов в питоне используется команда range(), которая берёт диапазон и перебирает его по одному элементу, поэтому пишем простой цикл:

# объявляем список животных, которых мы лечим в ветклинике animals = ['собака', 'кошка', 'попугай', 'хомяк', 'морская свинка'] # перебираем все элементы списка for i in range(animals): # и выводим их по одному на экран print(animals[i])

Но при запуске программа останавливается и выводит ошибку:

❌ TypeError: ‘list’ object cannot be interpreted as an integer

Странно, мы же всё сделали по правилам, почему так?

Что это значит: команда range() работает с диапазонами, которые явно представлены в числовом виде, например range(5). А у нас вместо этого стоит список со строковыми значениями. Python не знает, как это обработать в виде чисел, поэтому выдаёт ошибку.

Когда встречается: когда в диапазоне мы указываем сам список или массив, вместо того чтобы указать количество элементов в нём.

Как исправить ошибку TypeError: ‘list’ object cannot be interpreted as an integer

Если вы хотите организовать цикл, в котором нужно перебрать все элементы списка или строки, используйте дополнительно команду len(). Она посчитает количество элементов в вашей переменной и вернёт числовое значение, которое и будет использоваться в цикле:

# объявляем список животных, которых мы лечим в ветклинике animals = ['собака', 'кошка', 'попугай', 'хомяк', 'морская свинка'] # получаем длину списка и перебираем все его элементы for i in range(len(animals)): # и выводим их по одному на экран print(animals[i])

Практика

Попробуйте выяснить самостоятельно, есть ли здесь фрагмент кода, который работает без ошибок:

lst = [3,5,7,9,2,4,6,8] for i in range(lst): print(lst[i]) 

lst = (3,5,7,9,2,4,6,8) for i in range(lst): print(lst[i]) 

lst = (3) for i in range(lst): print(lst[i]) 

В «Яндекс Практикуме» можно стать разработчиком, тестировщиком, аналитиком и менеджером цифровых продуктов. Первая часть обучения всегда бесплатная, чтобы попробовать и найти то, что вам по душе. Дальше — программы трудоустройства.

Скорее всего, вы забыли закрыть скобки при объявлении функции.

Вредная ошибка, которую легко исправить.

Самая популярная ошибка у новичков.

Почти настоящие статьи на цепях Маркова

Используем силу встроенных библиотек

Невзламываемый шифр за 4 строчки кода.

Это ошибка переполнения из-за математических операций

Что можно сделать в современном вебе.

Добавляем новые возможности через API.

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How to fix “TypeError: ‘str’ object cannot be interpreted as an integer”

If you are getting trouble with the error “TypeError: ‘str’ object cannot be interpreted as an integer”, do not worry. Today, our article will give a few solutions and detailed explanations to handle the problem. Keep on reading to get your answer.

Why does the error “TypeError: ‘str’ object cannot be interpreted as an integer” occur?

TypeError is an exception when you apply a wrong function or operation to the type of objects. “TypeError: ‘str’ object cannot be interpreted as an integer” occurs when you try to pass a string as the parameter instead of an integer. Look at the simple example below that causes the error.

myStr = "Welcome to Learn Share IT" for i in range(myStr): print(i)

Traceback (most recent call last) in ----> 3 for i in range(myStr): TypeError: 'str' object cannot be interpreted as an integer

The error occurs because the range() function needs to pass an integer number instead of a string.

Let’s move on. We will discover solutions to this problem.

Solutions to the problem

Traverse a string as an array

A string is similar to an array of strings. As a result, when you want to traverse a string, do the same to an array. We will use a loop from zero to the length of the string and return a character at each loop. The example below will display how to do it.

myStr = "Welcome to Learn Share IT" for i in range(len(myStr)): print(myStr[i], end=' ')

W e l c o m e t o L e a r n S h a r e I T 

Traverse elements

The range() function is used to loop an interval with a fix-step. If your purpose is traversing a string, loop the string directly without the range() function. If you do not know how to iterate over all characters of a string, look at our following example carefully.

myStr = "Welcome to Learn Share IT" for i in myStr: print(i, end=' ')

W e l c o m e t o L e a r n S h a r e I T 

Use enumerate() function

Another way to traverse a string is by using the enumerate() function. This function not only accesses elements of the object but also enables counting the iteration. The function returns two values: The counter and the value at the counter position.

myStr = "Welcome to Learn Share IT" for counter, value in enumerate(myStr): print(value, end=' ')

W e l c o m e t o L e a r n S h a r e I T 

You can also get the counter with the value like that:

myStr = "Welcome to Learn Share IT" for counter, value in enumerate(myStr): print(f"(,)", end= ' ')

(0,W) (1,e) (2,l) (3,c) (4,o) (5,m) (6,e) (7, ) (8,t) (9,o) (10, ) (11,L) (12,e) (13,a) (14,r) (15,n) (16, ) (17,S) (18,h) (19,a) (20,r) (21,e) (22, ) (23,I) (24,T) 

Summary

Our article has explained the error “TypeError: ‘str’ object cannot be interpreted as an integer” and showed you how to fix it. We hope that our article is helpful to you. Thanks for reading!

Maybe you are interested:

My name is Robert Collier. I graduated in IT at HUST university. My interest is learning programming languages; my strengths are Python, C, C++, and Machine Learning/Deep Learning/NLP. I will share all the knowledge I have through my articles. Hope you like them.

Name of the university: HUST
Major: IT
Programming Languages: Python, C, C++, Machine Learning/Deep Learning/NLP

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Typeerror: ‘str’ object cannot be interpreted as an integer [SOLVED]

The “typeerror: ‘str’ object cannot be interpreted as an integer” error message is a common error message that you might encounter while doing your program in the Python programming language.

If you’re having trouble fixing this error, don’t worry, because we understand you; that’s why we’re here. Do you want to know why? well…

In this article, we are going to explore how to troubleshoot this “typeerror: str object cannot be interpreted as an integer” error message.

What is Python data types?

Each data type has specific properties and behaviors that affect how they are used in Python scripts.

For instance, an integer is a whole number that is either positive, negative, or zero. On the other hand, a string is a sequence of characters enclosed in quotes, like “Hi, welcome to Itsourcecode.”

In Python, variables are assigned a data type based on the value assigned to them.

What is “typeerror: ‘str’ object cannot be interpreted as an integer” error message?

This “typeerror ‘str’ object cannot be interpreted as an integer” error message occurs when you are trying to perform mathematical operations on a string variable.

In Python, you cannot perform mathematical operations on strings, mainly because they are non-numeric data types.

So that is why, when you attempt to use a string in mathematical calculations, it will raise a “typeerror str object cannot be interpreted as an integer” error because it is unable to interpret the string as a number.

Furthermore, this error message indicates that you need to convert the string to a numeric data type before using it in mathematical operations.

What are the causes of “typeerror: str object cannot be interpreted as an integer” error?

• The primary cause of this error in Python is attempting to perform mathematical operations on a string variable or on an empty string.

• Using an incorrect data type in function arguments.

• Passing the wrong data type to a function.

How to fix the “typeerror: ‘str’ object cannot be interpreted as an integer” error message?

To resolve the “typeerror: str object cannot be interpreted as an integer” error message in Python, you need to ensure that you are performing mathematical operations on variables of the correct data type.

Here are some ways to fix the error:

1. Convert the string to an integer

You can use the ‘int‘ function to convert a string to an integer. If you have a variable “num” that contains a string value, you can convert it to an integer using the “int” function.

x = int(input("Give starting number: ")) y = int(input("Give ending number: ")) for i in range(x, y): print(i)

Give starting number: 5 Give ending number: 10 5 6 7 8 9

Another example:

num = "5" sum= int(num) + 5 print(sum)

2. Verify data type of variables

It is important to check the data type of variables before performing the operations. It ensures that you are not going to perform mathematical operations on string variables.

You can check the data type of a variable using the ‘type’ function as follows:

num = "5" if type(num) == str: print("num is a string") else: print("num is not a string")

In this example, the ‘if’ statement checks if the variable ‘num‘ is a string, and if it is, it prints a message indicating that it’s a string.

3. Using string formatting to convert variables to strings

The “string” formatting is used to convert the integer variable “num_int” to a string value that can be included in the string.

# Initialize an integer variable num_int = 5 # Convert the integer to a string using string formatting string = "The number is <>.".format(num_int) # Print the string print(string)

Conclusion

By executing the different solutions that this article has given, you can easily fix the “typeerror: ‘str’ object cannot be interpreted as an integer” error message in Python.

We are hoping that this article provides you with sufficient solutions; if yes, we would love to hear some thoughts from you.

Thank you very much for reading to the end of this article. Just in case you have more questions or inquiries, feel free to comment, and you can also visit our official website for additional information.

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