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Agentic AI Engineer Basic Code / of Build Your First Agentic AI with Python

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🧠 What is an Agentic AI Engineer?
🎯 Definition
An Agentic AI Engineer is a developer who builds AI agents that can think, decide, and act independently to complete tasks.
🔄 Flow
User → AI Agent → Decision (LLM Brain) → Tools → Response
🧩 Responsibilities
  • Build AI agents using LangGraph / LangChain
  • Integrate LLMs like OpenAI, Gemini, Claude
  • Connect APIs, databases, and AWS services
  • Design decision-making workflows
  • Create end-to-end systems (UI → API → Agent)
🧑‍💻 Example
User asks: "Get my order details"
Agent decides to fetch data from database and returns result.
⚙️ Skills Required
  • Python
  • APIs (FastAPI / Flask)
  • LLMs (OpenAI, Gemini)
  • LangGraph / LangChain
  • AWS (Lambda, API Gateway, S3)
🚀 Difference
Normal Developer Agentic AI Engineer
Writes fixed logic Builds decision-making systems
If-else conditions AI-based reasoning
Static apps Intelligent agents
💻 Sample Agent Code
import json

from openai import OpenAI

from common.constants import CHAT_GPT_API_KEY
from prompts.function_selection_prompt import SYSTEM_PROMPT


def addition(a, b):
    print("This is addition function")
    print("Results: ", a + b)


def subtraction(a, b):
    print("This is subtraction")
    print("Results: ", a - b)


def multiplication(a, b):
    print("THis is multiplication")
    print("Results: ", a * b)


if __name__ == "__main__":
    input = "Please do the subtract  for these two values 10, 5"
    client = OpenAI(api_key=CHAT_GPT_API_KEY)

    response = client.chat.completions.create(
        model="gpt-4o-mini",
        messages=[
            {"role": "system", "content": SYSTEM_PROMPT},
            {"role": "user", "content": input}
        ]
    )

    result = response.choices[0].message.content
    parsed = json.loads(result)
    print(parsed)

    if parsed['function'] == 'addition':
        addition(parsed['a'], parsed['b'])
    elif parsed['function'] == 'subtraction':
        subtraction(parsed['a'], parsed['b'])
    elif parsed['function'] == 'multiplication':
        multiplication(parsed['a'], parsed['b'])
    else:
        print("Please select proper process")