1. Yes, using the pyminizip library of Python.
2. Context managers are a way of allocating and releasing some sort of the resource exactly where you need it. The simplest example is file access:

with open ("foo", 'w+') as foo:
foo.write("Hello!")
is similar to
foo = open ("foo", 'w+'):
 foo.write("Hello!")
foo.close()

3. Pickling in Python refers to the process of serializing objects into binary streams, while unpickling is the inverse of that.
4. Function with no argument and no return value
   Function with no argument and with return value
   Function with argument and no return value
   Function with argument and return value