New submission from Clément Boyer <clem...@hacknowledge.ch>:
I use a class to write easily json when having generator.
```python
class StreamArray(list):
def __init__(self, generator):
super().__init__()
self.generator = generator
def __iter__(self):
return self.generator
def __len__(self):
return 1
```
Below a test comparing json.dump and json.dumps.
```
>>> import json
>>> class StreamArray(list):
... def __init__(self, generator):
... super().__init__()
... self.generator = generator
... def __iter__(self):
... return self.generator
... def __len__(self):
... return 1
...
>>> g = (i for i in range(0))
>>> json.dumps({"a": StreamArray(g)})
'{"a": []}'
>>> f = open("/tmp/test.json", "w+")
>>> g = (i for i in range(0))
>>> json.dump({"a": StreamArray(g)}, f)
>>> f.close()
>>> print(open("/tmp/test.json").read())
{"a": ]}
```
I don't know if it's me or if there is actually a problem, could you help me ?
----------
components: Library (Lib)
messages: 319436
nosy: biloup
priority: normal
severity: normal
status: open
title: Json.dump() bug when using generator
type: behavior
versions: Python 3.6
_______________________________________
Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue33850>
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