<div id="readability-page-1" class="page"><div>
<p>It’s difficult to understand why the below is not the default of the pydantic.BaseModel since they look so basic, but anyhow, these are ones I found and keep using.</p>


<div><pre title="">model_config = ConfigDict(
    arbitrary_types_allowed=True,  # to allow arbitrary type like pl.DataFrame
    extra="forbid",  # extra parameters are not accepted
    protected_namespaces=("protected_",),  # default is 'model_'
    validate_assignment=True,  # assignment is also validated
)
</pre></div>


<p>extra=”forbid” prevents following from passing.</p>


<div><pre title="">classs Foo(BaseModel):
  ohlc_ratio: bool

Foo(ohlc=True)
</pre></div>


<p>protected_namespace=(“protected_”, ) makes it possible to use field name that starts with model_. Without it, model_name field causes a trouble.</p>


<div><pre title="">class Foo(BaseModel):  # error
  model_name: str
</pre></div></div></div>

Passion is like genius; a miracle.

It’s difficult to understand why the below is not the default of the pydantic.BaseModel since they look so basic, but anyhow, these are ones I found and keep using. extra=”forbid” prevents following from passing. protected_namespace=(“protected_”, ) makes it possible to use field name that starts with model_. Without it, model_name field causes a trouble.

Recommended config_dict for pydantic.BaseModel

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