Question (see pic) Code: (see question below the code): Note: Dont forget "classes" classes = {}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(___): #TO DO: add new attributes and methods here # # # key = 0 def __str__(self): document_info = f"This Document instance has the following stats.\n" document_info += f"1. word count: {self.word_count}\n" document_info += f"2. status: {self.status}\n" document_info += f"3. grade: {self.grade}\n" document_info += f"4. number of times the grade was requested before the document was submitted: {self.asked_grade_before_submission_count}\n" #TO DO: Fill in the blanks if self.key <= 3: document_info += "" elif self.key == 4: document_info += f"This Document instance has _ instance attribute/s." elif self.key == 5: document_info += f"The class used to create this object has _ method/s." elif self.key == 6: document_info += f"The class used to create this object has _ class attribute/s." elif self.key == 7: document_info += f"The class used to create this object has _ special method/s." return document_infodef is_command_valid(command): global classes #TO DO: add validation steps here return True if __name__ == "__main__": while(True): command = input() if command == 'exit': break elif command.find(" = ") != -1: exec(command) print("Valid command") else: if is_command_valid(command): exec(command) print("Valid command") else: print("Invalid command") print(essay) Create a Python class, Document.Using PYTHON: The instances of this class have the following attributes: word_count, status, grade, asked_grade_before_submission_count and the following methods: add_words, submit,get_grade,(1) key - a class attribute that determines the output when printing the document instance. It has a value of 0 by default.Let us also add these additional method/s for the Document class:str . For this exercise, we will add the following attribute/s:(1) copy_content - takes in source_document as a parameter of type Document then updates the word_count of the destination document (or the document where this method was invoked). Theword_count is updated accordingly so that the content of the destination document is replaced by the source document.(2) append_content - takes in source_document as a parameter of type Document then updates the word_count of the destination document. The word_count is updated such that the content ofthe source document is appended to the destination document.Input FormatThe inputs are commands that can access an attribute or invoke a method of a Document instance. These commands can either be valid or invalid.ConstraintsString arguments when creating a Document instance and when invoking the add words method will be limited to 1000 characters at maximum. Only alphanumeric characters will be used as anargument to these methods.The invalid commands only include those that are trying to access an attribute of the object that is undefined.FormatThe output will be composed of 5 - 6 lines. The first five lines show the stats of the document being printed. The other is either an empty string or a string that shows one out of many descriptionsof the Document instance being printed.Sample Input 2essay = Document ("Roses are red")classes ['essay'] = essayessay_draft = Document ("Violets are blue")classes ['essay_draft'] = essay_draftessay. append_content(essay_draft)essay.add_words ("Sugar is sweet and so are you")essay.key_1essay.delete( )essay.key = 0exitSample Input 0essay = Document ("Roses are red")classes ['essay'] = essayessay_draft = Document("Violets are blue")classes ['essay_draft'] = essay_draftessay.append_content(essay_draft)essay.key = 0exitSample Output 0Valid commandValid commandValid commandValid commandValid commandSample Output 2Valid commandValid commandValid commandValid commandThis Document instance has the following stats.1. word count: 6Valid commandValid commandValid command2. status: draft3. grade: awaiting submission4. number of times the grade was requested before the document was submitted: 0Invalid commandInvalid commandValid commandThis Document instance has the following stats.1. word count: 132. status: draft3. grade: awaiting submission4. number of times the grade was requested before the document was submitted: 0Sample Input 1essay = Document ("Roses are red")classes['essay'] = essayessay_draft = Document("Violets are blue")classes ['essay_draft'] = essay_draftessay.append_content (essay_draft)another_essay_v2 = Document ("Go away Anna! Okay bye.")essay.copy_content(another_essay_v2)essay.key = 0Sample Input 3essay = Document ("Roses are red")classes ['essay'] = essayessay_draft = Document ("Violets are blue")classes ['essay_draft'] = essay_draftessay.append_content(essay_draft).append_content(essay_draft)essay.add_words("Sugar is sweet and so are you")essay.key_1essay.delete()essay.key = 0exitexitSample Output 1Valid commandValid commandValid commandValid commandValid commandValid commandValid commandValid commandThis Document instance has the following stats.1. word count: 5Sample Output 3Valid commandValid commandValid commandValid commandValid command2. status: draft3. grade: awaiting submission4. number of times the grade was requested before the document was submitted: 0Valid commandInvalid commandInvalid commandValid commandThis Document instance has the following stats.1. word count: 162. status: draft3. grade: awaiting submission4. number of times the grade was requested before the document was submitted: 0

classes = {} 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(___): #TO DO: add new attributes and methods here # # # key = 0 def __str__(self): document_info = f"This Document instance has the following stats.\n" document_info += f"1. word count: {self.word_count}\n" document_info += f"2. status: {self.status}\n" document_info += f"3. grade: {self.grade}\n" document_info += f"4. number of times the grade was requested before the document was submitted: {self.asked_grade_before_submission_count}\n" #TO DO: Fill in the blanks if self.key <= 3: document_info += "" elif self.key == 4: document_info += f"This Document instance has _ instance attribute/s." elif self.key == 5: document_info += f"The class used to create this object has _ method/s." elif self.key == 6: document_info += f"The class used to create this object has _ class attribute/s." elif self.key == 7: document_info += f"The class used to create this object has _ special method/s." return document_info def is_command_valid(command): global classes #TO DO: add validation steps here return True if __name__ == "__main__": while(True): command = input() if command == 'exit': break elif command.find(" = ") != -1: exec(command) print("Valid command") else: if is_command_valid(command): exec(command) print("Valid command") else: print("Invalid command") print(essay)

classes = {} 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(_): #TO DO: add new attributes and methods here # # # key = 0 def str__(self): document_info = f"This Document instance has the following stats.\n" document_info += f"1. word count: {self.word_count}\n" document_info += f"2. status: {self.status}\n" document_info += f"3. grade: {self.grade}\n" document_info += f"4. number of times the grade was requested before the document was submitted: {self.asked_grade_before_submission_count}\n" #TO DO: Fill in the blanks if self.key <= 3: document_info += "" elif self.key == 4: document_info += f"This Document instance has _ instance attribute/s." elif self.key == 5: document_info += f"The class used to create this object has _ method/s." elif self.key == 6: document_info += f"The class used to create this object has _ class attribute/s." elif self.key == 7: document_info += f"The class used to create this object has _ special method/s." return document_info def is_command_valid(command): global classes #TO DO: add validation steps here return True if name == "main": while(True): command = input() if command == 'exit': break elif command.find(" = ") != -1: exec(command) print("Valid command") else: if is_command_valid(command): exec(command) print("Valid command") else: print("Invalid command") print(essay)

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

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Question (see pic)

Code: (see question below the code):

Note: Dont forget "classes"

classes = {}

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(___):

#TO DO: add new attributes and methods here
#
#
#

key = 0

def __str__(self):
document_info = f"This Document instance has the following stats.\n"
document_info += f"1. word count: {self.word_count}\n"
document_info += f"2. status: {self.status}\n"
document_info += f"3. grade: {self.grade}\n"
document_info += f"4. number of times the grade was requested before the document was submitted: {self.asked_grade_before_submission_count}\n"

#TO DO: Fill in the blanks
if self.key <= 3:
document_info += ""
elif self.key == 4:
document_info += f"This Document instance has _ instance attribute/s."
elif self.key == 5:
document_info += f"The class used to create this object has _ method/s."
elif self.key == 6:
document_info += f"The class used to create this object has _ class attribute/s."
elif self.key == 7:
document_info += f"The class used to create this object has _ special method/s."
return document_info

def is_command_valid(command):
global classes
#TO DO: add validation steps here
return True

if __name__ == "__main__":
while(True):
command = input()
if command == 'exit':
break
elif command.find(" = ") != -1:
exec(command)
print("Valid command")
else:
if is_command_valid(command):
exec(command)
print("Valid command")
else:
print("Invalid command")
print(essay)