Understanding Lists | Python Fiddle

#Python List is written as set of comma separated values surrounded by squared brackets 
#Lists may contain items of different data types, but usually all items will be of the same type
#Lists can be  indexed and sliced
#Lists can be concatenated
#Lists are Mutable i.e. their contents can be appended
#Use the .append() method to add items to the end of the list
#Use the len() function to return the length of a list

#EXAMPLE OF A LIST

numbers = [9, 8, 7, 6, 5, 4, 3, 2, 1, 0]
print numbers

#EXAMPLE 2

fruits = ['apple', 'berry', 'cherry', 'grape']
print fruits

#INDEXING AND SLICING LISTS

print numbers[0],',',numbers[-1]		#indexed:	returns the first and last items respectively in the list 
print fruits[0],',',fruits[-1]			#indexeed:	returns the last item in the list
print numbers[:6]						#sliced:	returns items 0 to 5 in the list
print numbers[6:]						#sliced:	returns items 6 to to the last in the list

#CONCATENATION

basket = numbers + fruits
print basket

basket2 = numbers[:3] + fruits[2:]
print basket2

#MUTABLE

print 'This is an example of the mutable nature of Lists'

print fruits[1]
fruits[1] = 'banana'					#adding a new value to list index 1
print fruits[1],',', 'berry was replaced with banana'
print fruits

#append() method and len() function

fruits.append('orange')					#.append() adds an item to the end of the list
print fruits
print len(fruits)						#len() returns the length or number of items in the list

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