Given code like this:
```
d = {1: {2: {3: 4}}}
print(d[1][2][3])
d[1][2][3] = None
print(d)
```
It should be possible to rewrite it using a starred expression, like this:
```
d = {1: {2: {3: 4}}}
keys= 1,2,3
print(d[*keys])
d[*keys] = None
print(d)
```
Hopefully it's clear from that example what I'm suggesting.
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