I want to sort a nested dict in pyhon via pandas.

```py
import pandas as pd 

# Data structure (nested list):
# {
#   category_name: [[rank, id], ...],
#   ...
# }

all_categories = {
    "category_name1": [[2, 12345], [1, 32512], [3, 32382]],
    "category_name2": [[3, 12345], [9, 25318], [1, 24623]]
}

df = pd.DataFrame(all_categories.items(), columns=['Category', 'Rank'])
df.sort_values(['Rank'], ascending=True, inplace=True) # this only sorts the list of lists

```

Can anyone tell me how I can get to my goal? I can't figure it out. Via panda it's possible to `sort_values()` by the second column, but I can't figure out how to sort the nested dict/list.

I want to sort ascending by the rank, not the id.