Pydantic: condecimal: Method to constrain decimals

‘condecimal’ method is used to constrain decimal values. Below table summarizes the arguments of ‘condecimal’ method.

 

Argument	Data type	Description
gt	Decimal = None	enforces Decimal to be greater than the set value.
ge	Decimal = None	enforces Decimal to be greater than or equal to the set value
lt	Decimal = None	enforces Decimal to be less than the set value
le	Decimal = None	enforces Decimal to be less than or equal to the set value
max_digits	int = None	maximum number of digits within the decimal. it does not include a zero before the decimal point or trailing decimal zeroes
decimal_places	int = None	max number of decimal places allowed. it does not include trailing decimal zeroes
multiple_of	Decimal = None	enforces decimal to be a multiple of the set value

 

Find the below working application.

 

Example

class Box(BaseModel):
    id: int
    weight: condecimal(lt = 30, gt = 1, max_digits=4)

 

Find the below working application.

condecimal_demo_1.py

from pydantic import (
    BaseModel,
    condecimal,
    ValidationError
)

class Box(BaseModel):
    id: int
    weight: condecimal(lt = 30, gt = 1, max_digits=4)

try:
    box1 = Box(id = 1, weight = 10.456)
except ValidationError as e:
    print(e.json())

 

Output

[
  {
    "loc": [
      "weight"
    ],
    "msg": "ensure that there are no more than 4 digits in total",
    "type": "value_error.decimal.max_digits",
    "ctx": {
      "max_digits": 4
    }
  }
]

 

 

 

 

  

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