List methods exercise | Python Fiddle

emptylist = []

#help(list.append)
# mandatory arguments: 1
# type arguments: 
''' explanation:
'''
# example with explanation above
emptylist.append(2)
print emptylist
emptylist.append(3)
print emptylist
emptylist.append(2)
print emptylist

#help(list.count)
# mandatory arguments: 1
# type arguments: 
''' explanation:
'''
# example with explanation above
print emptylist.count(2)
print emptylist.count(3)

help(list.index)
# mandatory arguments: 1
# type arguments: 
''' explanation: Only for the first occuring item. 
'''
# example
#Here it shows us that '3' occurs at index  1
print emptylist.index(3)
#Here it shows us that '2' occurs at index  0 (and not 2)
print emptylist.index(2)

help(list.insert)
# mandatory arguments: 2
# type arguments: the first argument has to be int, the second can be anything that can be added in a list.
''' explanation: .insert does not return anything, but changes 
the current list by inserting an element before an index specified in 
the first argument of the method. '''
# example 
# Here '8' gets added to the list before the 6th index (so at the end)
emptylist.insert(6,8)
print emptylist
# Here '8' gets added to the list before the 6th index
emptylist.insert(2,8)
print emptylist

help(list.pop)
# mandatory arguments: 0
# type arguments: -
''' explanation: .pop changes the current list by deleting the last element of a list, 
and then returns this deleted element. With optional arguments you can specify the index 
of an item you would like to see removed from the list. '''
# example 
# This removes the last '8' in the list
print emptylist.pop()
# The changed list without '8'
print emptylist
# This removes the first '2' in the list
print emptylist.pop(0)
# The changed list without '2'
print emptylist

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