CkPython

Conversation with Streaming Responses

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Demonstrates an AI conversation with receiving streaming responses. CkPython

import sys
import chilkat

success = False

# This example assumes the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

ai = chilkat.CkAi()

# The provider can be "openai", "google", "claude", "deepseek", "xai", or "perplexity".
# Support for additional providers will be added in future versions of Chilkat.
ai.put_Provider("google")

# Use your provider's API key.
ai.put_ApiKey("MY_API_KEY")

# Choose a model.
ai.put_Model("gemini-2.5-flash")

# Indicate streaming mode is to be used.
ai.put_Streaming(True)

# Create a new conversation to be maintained locally in memory.
# If the conversation is the first to be created, it is also automatically selected.
systemMsg = "You are a creative storyteller"
developerMsg = ""
conversationName = "test_conversation"
ai.NewConvo(conversationName,systemMsg,developerMsg)

# Add a text input.
ai.InputAddText("Write a detailed story about a turtle who decides to run a bakery.  Describe the setting, the kinds of pastries, how the turtle feels, and include at least three paragraphs.")

# Ask the AI for text output.
success = ai.Ask("text")
if (success == False):
    print(ai.lastErrorText())
    sys.exit()

sbEventName = chilkat.CkStringBuilder()
sbDelta = chilkat.CkStringBuilder()
sbFullResponse = chilkat.CkStringBuilder()
finished = False
abortFlag = False
maxWaitMs = 5000

while not finished :

    result = ai.PollAi(abortFlag)
    if (result == 1):
        # We have output waiting.  It should be instantly available.  The maxWaitMs is just-in-case.
        success = ai.NextAiEvent(maxWaitMs,sbEventName,sbDelta)
        if (success == False):
            print(ai.lastErrorText())
            sys.exit()

        # Some AI providers send many "empty" events.  Just ignore them.
        if (not sbEventName.ContentsEqual("empty",True)):

            # The delta contains the new output.  This could be emitted to a display or the terminal
            # as real-time output.
            if (sbEventName.ContentsEqual("delta",True)):
                # This example will emit each delta to its own line.
                print(sbDelta.getAsString())

                # Accumulate the delta's so we can show the full response later.
                sbFullResponse.AppendSb(sbDelta)
            else:
                # A streaming AI response is always terminated by a single "null_terminator" event.
                finished = sbEventName.ContentsEqual("null_terminator",True)

    else:
        if (result == 0):
            # Nothing is immediately available. Sleep for 1/10 of a second before polling again.
            ai.SleepMs(100)
        else:
            # Something failed..
            print(ai.lastErrorText())
            finished = True

# -------------------------------------------------------------
# The response is in markdown format.
# Also see Markdown to HTML Conversion Examples.
# -------------------------------------------------------------

# Show the accumulated (full) response.
print("----")
print(sbFullResponse.getAsString())
print("----")

# ----------------------------------------------------------------------------------------------------------
# For the 2nd request in this conversation, ask for a shorter version of the story.
ai.InputAddText("Rewrite the story, but this time make it shorter, about one third as long.")
success = ai.Ask("text")
if (success == False):
    print(ai.lastErrorText())
    sys.exit()

sbFullResponse.Clear()
finished = False

while not finished :

    result = ai.PollAi(abortFlag)
    if (result == 1):
        # We have output waiting.  It should be instantly available.  The maxWaitMs is just-in-case.
        success = ai.NextAiEvent(maxWaitMs,sbEventName,sbDelta)
        if (success == False):
            print(ai.lastErrorText())
            sys.exit()

        # Some AI providers send many "empty" events.  Just ignore them.
        if (not sbEventName.ContentsEqual("empty",True)):

            # The delta contains the new output.  This could be emitted to a display or the terminal
            # as real-time output.
            if (sbEventName.ContentsEqual("delta",True)):
                # This example will emit each delta to its own line.
                print(sbDelta.getAsString())

                # Accumulate the delta's so we can show the full response later.
                sbFullResponse.AppendSb(sbDelta)
            else:
                # A streaming AI response is always terminated by a single "null_terminator" event.
                finished = sbEventName.ContentsEqual("null_terminator",True)

    else:
        if (result == 0):
            # Nothing is immediately available. Sleep for 1/10 of a second before polling again.
            ai.SleepMs(100)
        else:
            # Something failed..
            print(ai.lastErrorText())
            finished = True

print("----")
print(sbFullResponse.getAsString())