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[WIP] Check for valid kwargs in default from_dict #67

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[WIP] Check for valid kwargs in default from_dict #67

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1c9c0e4
Check for valid kwargs in default from_dict
mkhorton Nov 1, 2019
4b22644
Fix indentation
mkhorton Nov 1, 2019
13f79fd
Missing backslash
mkhorton Nov 1, 2019
b460589
Update warning message
mkhorton Nov 1, 2019
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19 changes: 18 additions & 1 deletion monty/json.py
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Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,8 @@

from inspect import getfullargspec

from warnings import warn

try:
import numpy as np
except ImportError:
Expand Down Expand Up @@ -163,8 +165,23 @@ def from_dict(cls, d):
:param d: Dict representation.
:return: MSONable class.
"""

# only pass valid args to class
args = getfullargspec(cls).args
decoded = {k: MontyDecoder().process_decoded(v) for k, v in d.items()
if not k.startswith("@")}
if (k in args) and (not k.startswith("@"))}

# if d contains args that are not valid, warn user (may be due to deprecation)
invalid_keys = {k for k in d.keys() if (k not in args) and (not k.startswith("@"))}
if invalid_keys:
msg = "Trying to de-serialize dictionary into {}, "\
"contains invalid key(s): {}.".format(cls.__name__, invalid_keys)
msg += " Valid keys are: {}".format(args)
if "@version" in d:
msg += " Dictionary was serialized using {} version {}."\
.format(d["@module"], d["@version"])
warn(msg)

return cls(**decoded)

def to_json(self) -> str:
Expand Down