What is the difference between the two methods, "foo is None", and "foo == None", for the purposes of determining if the type of an object is None?

Function sys.getrefcount(obj) returns the number of references to the object obj. Which of the following is the correct value returned by this function?

Which is the correct way to print to stderr in Python?

Python 2.3+ includes a standard module that implements a set datatype. Which of the following statements is true about the set datatype?

Which type is correct for instances of user-defined classes?

Read the following statements: Statement 1: The new-style class int already supports Bitwise, so there is no need to implement it again in derived classes. Statement 2: With new-style classes, data values can be referred to directly with ‘myself’. Which of the following is correct?

How can an element be removed from a list using its list index?

Which statement is true? A. ._variable is semi-private and meant just for convention. B. .__variable is considered superprivate and gets name mangled to prevent accidental access. C. .__variable__ is typically reserved for built-in methods or variables.

Which Python module can be used for copying files?

Which function modifie the list in place to indicate which items are directories, and which are plain files?

Which will throw an exception in Python?