mirror of
https://github.com/chanzuckerberg/cellxgene.git
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9c6273eb94
* move app creation to function * create engine without load * flake 8 fixes * cleanup original scanpy test * add default config * handle missing data * test data changes * unify update * load data isn't static anymore * make app a class
44 lines
1.3 KiB
Python
44 lines
1.3 KiB
Python
from functools import wraps
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from flask import json
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from numpy import float32, integer
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from server.app.util.errors import DriverError
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class Float32JSONEncoder(json.JSONEncoder):
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def __init__(self, *args, **kwargs):
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"""
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NaN/Infinities are illegal in standard JSON. Python extends JSON with
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non-standard symbols that most JavaScript JSON parsers do not understand.
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The `allow_nan` parameter will force Python simplejson to throw an ValueError
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if it runs into non-finite floating point values which are unsupported by
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standard JSON.
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"""
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kwargs["allow_nan"] = False
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super().__init__(*args, **kwargs)
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def default(self, obj):
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if isinstance(obj, float32):
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return float(obj)
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elif isinstance(obj, integer):
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return int(obj)
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return json.JSONEncoder.default(self, obj)
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def custom_format_warning(msg, *args, **kwargs):
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return f"[cellxgene] Warning: {msg} \n"
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def jsonify_scanpy(data):
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return json.dumps(data, cls=Float32JSONEncoder, allow_nan=False)
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def requires_data(func):
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@wraps(func)
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def wrapped_function(self, *args, **kwargs):
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if self.data is None:
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raise DriverError(f"error data must be loaded before you call {func.__name__}")
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return func(self, *args, **kwargs)
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return wrapped_function
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