Dictionary Hash Table

hi please have a check i have tried some commands with the dictionary in python

 

designs = {}
designs['c'] = 'circle'
designs['r'] = 'rectangle'
designs['o'] = 'oval'
designs['s'] = 'sqaure'
print designs['o']
#designs['o'] = 6
'o' in designs
if 'z' in designs: print designs['z']
print designs.get('z')
for key  in designs: print key
for key in designs.keys(): print key
print designs.keys()
print designs.values()
for key in sorted(designs.keys()):
print key,designs[key]
print designs.items()
for a,v in designs.items(): print a, '>', v