Assigning NoneType to Dict in Python

Question

I'm trying to assign `None` to a key in a dict, but I'm getting a TypeError: ``` self._rooms[g[0]] = None TypeError: 'NoneType' object does not support item assignment ``` My code is here: ``` r = open(filename, 'rU') for line in r: g = line.strip().split(',') if len(g) > 1: r1 = g[0] h = Guest(g[1], str2date(g[2]), str2date(g[3])) self._rooms.set_guest(r1, h) else: self._rooms[g[0]] = None r.close() ``` Before it would let me assign, but not it won't. It is strange.

Accepted Answer

The exception clearly states `TypeError: 'NoneType' object does not support item assignment` this suggests that `self._rooms` is actually `None`

Edit: As you said yourself

```
self._rooms = {} 
```

or

```
self._rooms = dict()
```

Will do what you need to clear the dict

Assigning NoneType to Dict in Python

Solution

Problem