TypeError: str() argument 2 must be str, not tuple when trying to print out a class name and attribu-CodePudding

Create a program called classname.py.

The program should define:

A class called person that has one method called hello
One attribute called name, which represents the name of the person

The hello method should print the string to the screen:

‘My name is ____ and I am a _____’

where:

The first blank should be the name attribute
The second blank should be the name of the class
The above blanks should NOT be manually printed

After defining the class, there are three things you must do:

Instantiate an object of the class
Run the hello method of the instantiated object
Print the name of the class

(The expected output is <class ‘main.person’>)

classname.py

import sys

class Classmate(str(sys.argv[1])):
    def __init___(self, name):
        self.name = name

    def hello(self):
        print(f'My name is {self.name} and I am a', end = '')

classmate1 = Classmate(sys.argv[1])
classmate1.hello()
print(classmate1.__class__)

Test Case Examples:

python3 classname.py Obi-Wan
python3 classname.py 'Ronald Jenkees'
python3 classname.py 123

Example Expected Output:

My name is Ronald Jenkees and I am a person
<class '__main__.person'>

Error Message:

Traceback (most recent call last):
  File "classname.py", line 3, in <module>
    class Classmate(str(sys.argv[1])):
TypeError: str() argument 2 must be str, not tuple

CodePudding user response：

The problem is that you misspelled __init__. I couldn't tell until I copied your code into an editor.

import sys

class Classmate:
    def __init__(self, name):
        self.name = name

    def hello(self):
        print(f'My name is {self.name} and I am a', end = '')

classmate1 = Classmate(sys.argv[1])
classmate1.hello()
print(classmate1.__class__)

When I try this on my machine with __init__ spelled correctly, I see:

My name is Frank and I am a<class '__main__.Classmate'>

Which is exactly what you've told it to type.