23 lines
592 B
Markdown
23 lines
592 B
Markdown
---
|
|
title: map_values
|
|
tags: dictionary,function,intermediate
|
|
---
|
|
|
|
Creates a dictionary with the same keys as the provided dictionary and values generated by running the provided function for each value.
|
|
|
|
- Use `dict.items()` to iterate over the dictionary, assigning the values produced by `fn` to each key of a new dictionary.
|
|
|
|
```py
|
|
def map_values(obj, fn):
|
|
return dict((k, fn(v)) for k, v in obj.items())
|
|
```
|
|
|
|
```py
|
|
users = {
|
|
'fred': { 'user': 'fred', 'age': 40 },
|
|
'pebbles': { 'user': 'pebbles', 'age': 1 }
|
|
}
|
|
|
|
map_values(users, lambda u : u['age']) # {'fred': 40, 'pebbles': 1}
|
|
```
|