MIT CS Lecture Four Notes

#Lists are more useful, but more complicated than tuples.
#difference between lists and tuples are that tuples are *immutable* -- Once you create a tuple, you cannot change its value.
#Lists are *Mutable* -- Once you create a list you can actually change it.
#assignments don't change the value of an object -- it just changes the object to which an id was bound; mutability is the way to change the value of an object itself
#	powerful concept, but also an opportunity to create programming blunders
# methods have different syntax than functions -- will see the importance when we learn classes
# Append is a *method*, method is an alternative syntax for writing a function, instead of function(L,e), you write L.method(e)

#slice - subsequence of tople or list 
#append is a method
#instead of append (L, e)
#L.append(e)
#

## ASSIGNMENT vs. MUTATION - underlying point.

# Example 1 --- Lists

#Techs = ['MIT', 'Cal Tech'] ##Create Lists, Techs & Ivys
#Ivys = ['Harvard', 'Yale', 'Brown']
#Univs = [] 
#Univs.append(Techs) ##Append Techs to Univs -- modifies the list by appending a list to the end of the empty list, THE LIST ITSELF IS APPENDED TO THE EMPTY LIST
#print 'Univs =', Univs
#Univs.append(Ivys)
#print 'Univs =', Univs
#for e in Univs:
#    print 'e =', e

#flat = Techs + Ivys
#print "flat =", flat

#artSchools = ['RISD', 'Harvard']
#for u2 in artSchools:
#    if u2 in flat:
#        flat.remove(u2)

#print 'flat =', flat

#flat.sort()
#print 'flat =', flat

#flat[1] = 'UMass'
#print 'flat =', flat

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