Pudantic

Author: imashwini09

Pydantic_tutorial/lecture_1.py

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+from pydantic import BaseModel
+
+class User(BaseModel):
+    username : str
+    email : str
+    age : int
+
+user1 = User(username="Ashwini", email= "ashwini@gmail.com", age= 26)
+print(user1)
+
+# user2 = User(username="badal", email=None, age=25)
+# print(user2)
+# Error for email
+

Pydantic_tutorial/lecture_2.py

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+from pydantic import BaseModel, ValidationError
+from datetime import datetime
+
+class User(BaseModel):
+    uid : int
+    username : str
+    email : str
+
+    verified_at : datetime | None = None
+
+    bio : str = ""
+    is_active : bool = True
+
+    full_name : str | None = None
+
+user = User(
+    uid = 1,
+    username="Ashwini",
+    email = "ashwini@gmail.com"
+)
+
+# print(user)
+
+print(user.username)
+
+# user.bio = 123
+# This will work even if 123 is not a string
+# print(user.bio)
+
+user.bio = "Python dev"
+
+print(user.model_dump_json(indent=2))

Pydantic_tutorial/lecture_3.py

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+from pydantic import BaseModel, ValidationError
+from datetime import datetime
+
+class User(BaseModel):
+    uid : int
+    username : str
+    email : str
+
+    verified_at : datetime | None = None
+
+    bio : str = ""
+    is_active : bool = True
+
+    full_name : str | None = None
+
+try:
+    user = User(
+        uid = 1,
+        username=None,
+        email = 123,
+    )
+
+    # print(user)
+except ValidationError as e:
+    print(e)
+
+
+# user.bio = "Python dev"
+# error because user object not created because of 2 validation error in try block
+# print(user.model_dump_json(indent=2))

Pydantic_tutorial/lecture_4.py

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+from pydantic import BaseModel, ValidationError, Field
+from datetime import datetime, UTC
+from functools import partial
+from typing import Literal
+
+class User(BaseModel):
+    uid : int
+    username : str
+    email : str
+
+    verified_at : datetime | None = None
+
+    bio : str = ""
+    is_active : bool = True
+
+    full_name : str | None = None
+
+class BlogPost(BaseModel):
+    title : str
+    content : str
+    view_count : int = 0
+    is_published : bool = False
+
+    tags : list[str] = Field(default_factory=list)
+
+    # create_at : datetime = Field(default_factory=lambda : datetime.now(tz=UTC))
+    # both will do same work lambda or partial function
+    create_at : datetime = Field(default_factory=partial(datetime.now,tz=UTC))
+
+    author_id : str | int
+    status : Literal["draft", "published", "archived"] = "draft"
+
+post = BlogPost(
+    title="Getting started with Python",
+    content="python is dynamically typing language.",
+    author_id="123",
+)
+
+print(post)