#!/usr/bin/python

def foo():
   print 'hello world'

# python calls these dictionaries.
# associative arrays
# An array indexed by an int, a string , or other types
#  key:data

# make an empty map
x = {}
print x

x = {'a':4, 'b':7,'hello':27}
print x
print x['a']

x['test'] = "this is a new value"
print x

x['foo'] = foo
print x

for key in x.keys():
   print "\t", key, "\t\t",  x[key]

print
for key in sorted(x.keys()):
   print "\t", key, "\t\t",  x[key]

print 'a' in x
print 'c' in x

for item in x.items():
    print "\t",item
    print "\t\t", item[0],"\t", item[1]


print
del x['foo']
print x
print

x.clear()
print x
print