>>> bob=[['name','Bob Smith'],['age',42],['pay',10000]]
>>> sue=[['name','Sue jones'],['age',45],['pay',20000]]
>>> people=[bob,sue]
>>> for person in people:
	print(person[0][1],person[2][1])

	
Bob Smith 10000
Sue jones 20000
>>> [person[0][1] for person in people]
['Bob Smith', 'Sue jones']
>>> 
>>> for person in people:
	for(name,value) in person:
		if name=='name':print(value)

		
Bob Smith
Sue jones
>>> 
>>> def field(record,label):
	for(fname,fvalue) in record:
		if fname==lavel:
			return fvalue

		

>>> def field(record,label):
	for(fname,fvalue) in record:
		if fname==label:
			return fvalue

		
>>> field(bob,'name')
'Bob Smith'
>>> field(sue,'pay')
20000
>>> 
>>> for rec in people:
	print(field(rec,'age'))

	
42
45
>>>