How to get driver for z location by name (without looping) I wish to be able to reference the driver for Location Z by name. Whenever I try using somethings like 

object.animation_data.drivers[object.location.z]


or

object.animation_data.drivers[object.location[2]]


I get 

TypeError:bpy_prop_collection[key]: invalid key, must be a string or an int, not Float


Any object I will call this function on will have a driver for Z location. Instead of iterating through the collection I was hoping I can call it by name (like properties).
I was able to find in the API documentation that there is a built in function for this collection.

Calling 

object.animation_data.drivers.find('location',2)


did the trick.