Changes

return f'%{t.2dhour:%.2d02d}:%.2d' % (t.hour, {t.minute, :02d}:{t.second):02d}'

ls CheckLab7.py || wget 'https://ictgithub.senecacollege.cacom/~eric.brauersenecaops445/ops445lab7-template/labsblob/LabCheckScriptsmaster/CheckLab7.py?raw=true' -O CheckLab7.py

::(a) We must first add code to check on the '''second''' attribute of the time object to make sure that it is not less than zero. If it is, we must borrow one from the '''minute''' attribute and add 60 to the '''second''' attribute. We have to repeat this checking until the '''second''' attribute is no long longer less than zero.<source lang="python"> while time.second < 0: time.minute -= 1 time.second += 60</source>::(b) We then have to add code to check on the '''minute''' attribute. If it is less than zero, we must borrow 1 from the 'hour' attribute and add 60 to the '''minute''' attribute. We have to repeat this checking until the '''minute''' attribute is no long longer less than zero.<source lang="python"> while time.minute < 0: time.hour -= 1 time.minute += 60</source>:8. After updating the change_time() function with the above additional codetasks, save the file and test it again in a Python interactive shell by importing the new version of the function.<source lang='bash'>

ls CheckLab7.py || wget 'https://ictgithub.senecacollege.cacom/~eric.brauersenecaops445/ops445lab7-template/labsblob/LabCheckScriptsmaster/CheckLab7.py?raw=true' -O CheckLab7.py

ls CheckLab7.py || wget 'https://ictgithub.senecacollege.cacom/~eric.brauersenecaops445/ops445lab7-template/labsblob/LabCheckScriptsmaster/CheckLab7.py?raw=true' -O CheckLab7.py

"""Simple object type for time of the day. data attributes: hour, minute, second function attributes: __init__, __str__, __repr__ time_to_sec, format_time, change_time, sum_time """ def __init__(self,hour=12,minute=0,second=0): """constructor for time object""" self.hour = hour self.minute = minute self.second = second def format_time(self): """Return time object (t) as a formatted string""" return f'%{self.2dhour:%02d}:{self.2dminute:02d}:%{self.2dsecond:02d}' % def sum_times(self.hour, selft2): """Add two time objests and return the sum.minute, self""" """Change this to become object method for our Time object (refer to lab7c.secondpy and change_time() method below)""" return sum

def sum_timeschange_time(self, t2seconds): """Add two time objests and return the sum.""" sum = Time(0,0,0) self_sec time_seconds = self.time_to_sec() t2_sec nt = t2.time_to_secsec_to_time(time_seconds + seconds) sum self.hour, self.minute, self.second = sec_to_time(self_sec + t2_sec)nt.hour, nt.minute, nt.second return sumNone

def change_timetime_to_sec(self, seconds): time_seconds = self.time_to_sec() '''convert a time object to a single integer representing the nt = sec_to_time(time_seconds + number of seconds)from mid-night''' minutes = self.hour, * 60 + self.minute, seconds = minutes * 60 + self.second = nt.hour, nt.minute, nt.second return Noneseconds

def time_to_sec(self): '''convert a time object to a single integer representing the number of seconds from mid-night''' minutes = self.hour * 60 + self.minute seconds = minutes * 60 + self.second return seconds  def valid_time(self): """check for the validity of the time object attributes: 24 > hour > 0, 60 > minute > 0, 60 > second > 0 """ if self.hour < 0 or self.minute < 0 or self.second < 0: return False if self.minute >= 60 or self.second >= 60 or self.hour >= 24: return False return True

:1. Create a new python file and name it as '''lab7d.py''' and , place the code listed above in it, and change '''sum_times()''' function from lab7c.py to become object method for our Time object (refering to change_time() method above might be helpful).

ls CheckLab7.py || wget 'https://ictgithub.senecacollege.cacom/~eric.brauersenecaops445/ops445lab7-template/labsblob/LabCheckScriptsmaster/CheckLab7.py?raw=true' -O CheckLab7.py

return f'%{self.2dhour:%.2d02d}:%.2d' % (self.hour, {self.minute, :02d}:{self.second) :02d}'

return '%.2d.%.2d.%.2d' % (self.hour'just instead of ':', selfyou are required use the '.minute, self' in the formatting string.second) '''

ls CheckLab7.py || wget 'https://ictgithub.senecacollege.cacom/~eric.brauersenecaops445/ops445lab7-template/labsblob/LabCheckScriptsmaster/CheckLab7.py?raw=true' -O CheckLab7.py

: Remember we define the sum_times() function to add to time objects and return their sum? After we moved the function definition under the class definition in lab7d.py, it became a class function, and method for the time object. It can be invoked by using the '''Time.sum_times(t1,t2) ''' syntax or '''t1.sum_times(t2) ''' syntax. However, there is also a way to invoke it by using a special function which ties to the '+' arithmetic operator.

"""return self.the result by using sum_times(t2)method"""

:1. Copy lab7e.py to a new file called lab7f.py. Add the function definition for __add__() after the __str____repr__() function to lab7f.py. Make sure that the '''def __add__(self, t2):''' line has the same indentation level as the __init__() function.

ls CheckLab7.py || wget 'https://ictgithub.senecacollege.cacom/~eric.brauersenecaops445/ops445lab7-template/labsblob/LabCheckScriptsmaster/CheckLab7.py?raw=true' -O CheckLab7.py

: '''Local scope(lab7g.py)''': <source lang="python">

:1. '''Global scope(lab7h.py)''': <source lang="python">

:4. '''Global keyword(lab7i.py)''': <source lang="python">

:5 . As the last task for this lab: modify the script above so that it would print the following, by changing only the scope of some objects. Save the program as '''lab7i.py''': <source lang="bash">

ls CheckLab7.py || wget 'https://ictgithub.senecacollege.cacom/~eric.brauersenecaops445/ops445lab7-template/labsblob/LabCheckScriptsmaster/CheckLab7.py?raw=true' -O CheckLab7.py