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[QUESTION] Pydantic ImportError: cannot import name 'Field'

See original GitHub issue

First, thanks for FastAPI! Great work here and this is fast indeed! We are thinking of using it instead of our actual framework.

Description

Is this normal I can’t import the class Field from Pydantic?

Additional context

This code:

from pydantic import BaseModel, Field

class BackbonePrefix(BaseModel):
    mask: int = Field(ge=0, le=31)

…gives me this error:

ImportError: cannot import name 'Field'

Issue Analytics

State:
Created 4 years ago
Reactions:3
Comments:11 (5 by maintainers)

Top GitHub Comments

2reactions

tiangolocommented, Apr 10, 2020

Thanks for the help here everyone! 👏 🙇

Thanks for reporting back and closing the issue @insideshell 👍

For everyone else, FastAPI has support for Pydantic version 1.0.0 and above since version 0.44.0, so, make sure you update your FastAPI version and upgrade the Pydantic version as well ✔️

2reactions

duz-sgcommented, Dec 16, 2019

@duz-sg You can import it by these ways in pydantic v1.x.
from pydantic.networks import EmailStr
or
from pydantic import EmailStr

Thanks, I saw this fix in another post, will try to fix it.

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