Python dictionary example

dictionary={'C':3,'A':1,'B':2}
print(dictionary)
>>> {'C': 3, 'A': 1, 'B': 2}

dictionary['A']=3
print(dictionary)
>>> {'C': 3, 'A': 3, 'B': 2}

# Printing all the keys
print(dictionary.keys())
>>> dict_keys(['C', 'A', 'B'])

# Printing all the values
print(dictionary.values())
>>> dict_values([3, 3, 2])

# Finding a key based on value
key=''
for x in dictionary.keys():
    if dictionary[x]==2:
        key=x
print(key)
>>> B