Example: Python OpenTelemetrySDK Instrumentation

from opentelemetry import trace
from opentelemetry.sdk.trace import TracerProvider
from opentelemetry.sdk.trace.export import BatchSpanProcessor
from opentelemetry.exporter.otlp.proto.http.trace_exporter import OTLPSpanExporter
from dotenv import load_dotenv
import os
# Load environment variables from .env file
load_dotenv()

# Setup tracer provider
provider = TracerProvider()
trace.set_tracer_provider(provider)


TFY_API_KEY = os.environ.get("TFY_API_KEY")
# OTLP exporter (HTTP)
otlp_exporter = OTLPSpanExporter(
    endpoint="{enter_your_api_endpoint}/v1/traces",
    headers={
        "Authorization": f"Bearer {TFY_API_KEY}",
        "TFY-Tracing-Project": "<enter_your_tracing_project_fqn>",
    }
)

# Span processor using batch (recommended for production)
span_processor = BatchSpanProcessor(otlp_exporter)
provider.add_span_processor(span_processor)

# Get tracer
tracer = trace.get_tracer(__name__)

# Child function — will create its own span
def greet_user(name):
    with tracer.start_as_current_span("greet_user_task") as span:
        # Add attributes to the span
        span.set_attribute("user.name", name)
        span.set_attribute("greeting.type", "welcome")

        print(f"Hello, {name}!")

# Parent function — also creates a span and calls the child
def main():
    with tracer.start_as_current_span("main_task"):
        user_name = "Sateesh"
        greet_user(user_name)
        print("Main task finished.")

# Run the main function
main()