Python Naming Conventions for Dictionaries/Maps/Hashes

Question

While other questions have tackled the broader category of sequences and modules, I ask this very specific question:

"What naming convention do you use for dictionaries and why?"

Some naming convention samples I have been considering:

# 'value' is the data type stored in the map, while 'key' is the type of key value_for_key={key1:value1, key2,value2} value_key={key1:value1, key2,value2} v_value_k_key={key1:value1, key2,value2} 

Don't bother answering the 'why' with "because my work tells me to", not very helpful. The reason driving the choice is more important. Are there any other good considerations for a dictionary naming convention aside from readability?

EDIT:

Chosen answer: value_key_map

Reason for chosen answer: Allows a code reviewer to quickly and easily figure out the key and value for a map, and the fact that it is a map without looking anywhere else.

Answer 1

key_to_value, for example surname_to_salary may be useful when there are closely interrelated maps in code: a to b, b to a, c to b etc.