Python Institute Exam PCPP-32-101 Topic 6 Question 38 Discussion

Actual exam question for Python Institute's PCPP-32-101 exam

Question #: 38
Topic #: 6

Select the true statements related to PEP 8 programming recommendations for code writing. (Select two answers:)

AYou should use the not ... is operator (e.g. if not spam is None:), rather than the is not operator (e.g. if spam is not None:), to increase readability.

BYou should make object type comparisons using the ismstanceQ method (e.g. if isinstance (obj, int) :) instead of comparing types directly (eg if type(obj) is type(i)).

CYou should write code in a way that favors the CPython implementation over PyPy, Cython. and Jython.

DYou should not write string literals that rely on significant trailing whitespaces as they may be visually indistinguishable, and certain editors may trim them

Show Suggested Answer

Suggested Answer: B, D

Option B is true because theunbind()method is invoked from within a widget's object1.

Option D is true because theunbind()method needs the event name as an argument1.

Theunbind()method in Tkinter is used to remove a binding between an event and a function. It can be invoked from within a widget's object when a binding is no longer needed. The method requires the event name as an argument to remove the binding for that specific event. For example:

button = tk.Button(root, text='Click me')

button.bind('<Button-1>', callback_function) # bind left mouse click event to callback_function

button.unbind('<Button-1>') # remove the binding for the left mouse click event

by Lisbeth at Sep 18, 2024, 02:44 AM

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