Hi community which is the best way to map over a dictionary

Question

Hi community which is the best way to map over a dictionary and acces the key and value on the mapping function i could find a example with this

fabian wolfmann · Answer

this is my example code ``` task def get dict new dict = 0 hi 1 yes 2 no return new dict task def print nice dict elem print elem with Flow testing as f print nice dict map get dict ```

fabian wolfmann · Answer

and this is my error ``` 2020 10 22 21 42 45 ERROR prefect FlowRunner | Unexpected error KeyError 3 Traceback most recent call last File home fabian anaconda3 lib python3 7 site packages prefect engine runner py line 48 in inner new state = method self state args kwargs File home fabian anaconda3 lib python3 7 site packages prefect engine flow runner py line 530 in get flow run state executor=executor File home fabian anaconda3 lib python3 7 site packages prefect utilities executors py line 521 in prepare upstream states for mapping upstream state result i KeyError 3 2020 10 22 21 42 45 ERROR prefect testing | Unexpected error occured in FlowRunner KeyError 3 lt Failed Unexpected error KeyError 3 gt ```

Mitchell Bregman · Answer

```with Flow testing as f my dict = get dict print nice dict map my dict items ```

fabian wolfmann · Answer

that didnt work for me upside down face

Jeremiah · Answer

Maybe calling `list my dict items ` Any indexable iterable should work but for best results you may want to ensure it is stably sorted

fabian wolfmann · Answer

still getting error it s seems it doesnt recognize that its a dict object

fabian wolfmann · Answer

```AttributeError FunctionTask object has no attribute items ```

Jeremiah · Answer

Oh I m so sorry I didn t read your setup correctly Try returning an iterable from your `get dict ` task instead of `new dict` return `list new dict items ` Then you should be able to map over that directly

Jeremiah · Answer

I didn t realize `my dict` was the result of a task mI didn t realize

fabian wolfmann · Answer

great it did work

Jeremiah · Answer

yes awesome sorry for the confusion

fabian wolfmann · Answer

no problem just to know why a `list` is more stably sorted than a `dict`

fabian wolfmann · Answer

also try with OrderedDict from collections and didnt worked

Jeremiah · Answer

`dict` is sorted by convention in Python 3 6+ but you can t for example get the 2nd element by accessing it with ` 2 ` it can only be accessed by key