字典

字典源程序：
classmates=['Michael','Boy','Tracy','李三','Tom']
scores=[90,86,78,98]
d={'Michael':78,'Boy':98,'李三':90,'Tom':86}
print(d['Tom'])

print('Tomas'in d)

c=d['Boy']=56
print(c)

f=d['Tracy']=100
print(f)

d.pop('Tom')
print(d)

print(d.keys())
print(d.values())
print(d.items())
print(dict(zip(classmates,scores)))