how to iterate over dictionary in python

1a_dict = {'color': 'blue', 'fruit': 'apple', 'pet': 'dog'}
2for key, value in a_dict.items():
3  print(key, '->', value)

1a_dict = {'apple':'red', 'grass':'green', 'sky':'blue'}
2for key in a_dict:
3  print key # for the keys
4  print a_dict[key] # for the values

1#iterate the dict by keys
2for key in a_dict:
3	print(key)
4#iterate the dict by items - (key,value)
5for item in a_dict.items():
6    print(item)
7#iterate the dict by values
8for value in a_dict.values():
9    print(value)

1new_list = [something(key, value) for key, value in a_dict.items()]

1d = {'x': 1, 'y': 2, 'z': 3} 
2for key in d:
3    print key, 'corresponds to', d[key]

1{% for key, value in data.items %}
2    <tr>
3        <td> Key: {{ key }} </td> 
4        <td> Value: {{ value }} </td>
5    </tr>
6{% endfor %}