📝 Update source examples and docs from Python 3.9 to 3.10 (#14900)

docs_src/path_params/tutorial001_py310.py

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+from fastapi import FastAPI
+
+app = FastAPI()
+
+
+@app.get("/items/{item_id}")
+async def read_item(item_id):
+    return {"item_id": item_id}

docs_src/path_params/tutorial002_py310.py

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+from fastapi import FastAPI
+
+app = FastAPI()
+
+
+@app.get("/items/{item_id}")
+async def read_item(item_id: int):
+    return {"item_id": item_id}

docs_src/path_params/tutorial003_py310.py

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+from fastapi import FastAPI
+
+app = FastAPI()
+
+
+@app.get("/users/me")
+async def read_user_me():
+    return {"user_id": "the current user"}
+
+
+@app.get("/users/{user_id}")
+async def read_user(user_id: str):
+    return {"user_id": user_id}

docs_src/path_params/tutorial003b_py310.py

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+from fastapi import FastAPI
+
+app = FastAPI()
+
+
+@app.get("/users")
+async def read_users():
+    return ["Rick", "Morty"]
+
+
+@app.get("/users")
+async def read_users2():
+    return ["Bean", "Elfo"]

docs_src/path_params/tutorial004_py310.py

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+from fastapi import FastAPI
+
+app = FastAPI()
+
+
+@app.get("/files/{file_path:path}")
+async def read_file(file_path: str):
+    return {"file_path": file_path}

docs_src/path_params/tutorial005_py310.py

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+from enum import Enum
+
+from fastapi import FastAPI
+
+
+class ModelName(str, Enum):
+    alexnet = "alexnet"
+    resnet = "resnet"
+    lenet = "lenet"
+
+
+app = FastAPI()
+
+
+@app.get("/models/{model_name}")
+async def get_model(model_name: ModelName):
+    if model_name is ModelName.alexnet:
+        return {"model_name": model_name, "message": "Deep Learning FTW!"}
+
+    if model_name.value == "lenet":
+        return {"model_name": model_name, "message": "LeCNN all the images"}
+
+    return {"model_name": model_name, "message": "Have some residuals"}