Question and test cases given below (see pic): Code for reference:class Document: #TO DO: define the constructor method, __init__ and then initialize values #def __init__(___, ___): # initilialize values here #TO DO: define the method add_words #def add_words(___, ___): #TO DO: define the method submit #def submit(___): #TO DO: define the method get_grade #def get_grade(___): def __str__(self): #TO DO: Fill in the blanks document_info = f"This Document instance has _ instance attributes.\n" document_info += f"The class used to create this object has _ methods and _ class attribute.\n" document_info += f"This Document instance has the following stats.\n" #TO DO: Complete document_info by adding more lines below return document_info if __name__ == "__main__": while(True): command = input() if command == 'exit': break exec(command) print(essay) USING PYTHON: Create a Python class, Document.Upon initialization, the instances of this class will take in one optional string parameter, initial_thoughts, which defaults to an empty string if not given during instance creation. Inaddition, the instances of this class will also have the following attributes:Input FormatAssume the inputs are user inputs that are valid commands and can access the attributes or invoke a method of the Document instance.ConstraintsString arguments when creating a Document instance and when invoking the add words method will be limited to 1000 characters at maximum.Output FormatThe output will be composed of seven lines with the first 2 lines showing some information about the Document object and the next 5 lines showing the current values of the instance attributes.Sample Input 0Sample Input 2essay = Document ("I gotta start with something.")exitessay = Document ()essay.add_words ("And I'd climb every mountain")essay.add_words ("And swim every ocean")essay.add_words ("Just to be with you")essay.add_words ("And fix what I've broken")Sample Output 0This Document instance has 4 instance attributes.The class used to create this object has 5 methods and o class attributes.This Document instance has the following stats.1. word count: 52. status: draft3. grade: awaiting submission4. number of times the grade was requested before the document was submitted: 0essay.get_grade()essay.get_grade ()essay.get_grade ()essay.get_grade()essay.get_grade ()essay.submit()essay.get_grade ()exitSample Input 1essay = Document ("And I'd climb every mountain")essay.add_words ("And swim every ocean")essay.add_words ("Just to be with you")essay.add_words ("And fix what I've broken")essay.get_grade ()essay.get_grade ()essay.get_grade ()essay.get_grade ()essay.get_grade ()essay.submit()essay.get_grade ()exitSample Output 2This Document instance has 4 instance attributes.The class used to create this object has 5 methods and e class attributes.This Document instance has the following stats.1. word count: 192. status: submitted3. grade: A+4. number of times the grade was requested before the document was submitted: 5Sample Output 1This Document instance has 4 instance attributes.The class used to create this object has 5 methods and o class attributes.This Document instance has the following stats.1. word count: 192. status: submitted3. grade: A+4. number of times the grade was requested before the document was submitted: 5

The question is about writing a python code to perform the given #TO-DO Tasks.

Answered: Question and test cases given below…

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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Question

Question and test cases given below (see pic):

Code for reference:

class Document:
#TO DO: define the constructor method, __init__ and then initialize values
#def __init__(___, ___):
# initilialize values here

#TO DO: define the method add_words
#def add_words(___, ___):

#TO DO: define the method submit
#def submit(___):

#TO DO: define the method get_grade
#def get_grade(___):

def __str__(self):
#TO DO: Fill in the blanks
document_info = f"This Document instance has _ instance attributes.\n"
document_info += f"The class used to create this object has _ methods and _ class attribute.\n"
document_info += f"This Document instance has the following stats.\n"
#TO DO: Complete document_info by adding more lines below

return document_info

if __name__ == "__main__":
while(True):
command = input()
if command == 'exit':
break
exec(command)
print(essay)