ctkchart 2.2.1

A lightweight Python library for creating animated, live-updating line charts natively in CustomTkinter — the modern dark-mode Tkinter framework.

ctkchart

A Python library for creating live-updating line charts in CustomTkinter.

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🎥 Watch the Main Demo Video on GitHub

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✨ Features

Feature	Description
⚡ Live Updates	Stream and display real-time data continuously
📉 Multiple Lines	Plot several lines on the same chart for easy comparison
🎨 Color Customization	Tailor colors to match your app's design
🌓 Dynamic Theme	Dynamic color change for dark & light themes
🔤 Font Customization	Adjust text fonts for better readability
📐 Dimension Control	Resize charts to fit any layout
🎛️ Granular Config	Fine-grained control via configure_*() methods (v2.2.0+)

📋 See what's new in the latest release →

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📦 Installation

pip install ctkchart

import ctkchart

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🚀 Quick Start

import customtkinter as ctk
import ctkchart
import random
import threading
import time

root = ctk.CTk()

# 1. Create the chart
chart = ctkchart.CTkLineChart(
    master=root,
    x_axis_values=("a", "b", "c", "d", "e", "f"),
    y_axis_values=(100, 900)
)
chart.place(x=10, y=10)

# 2. Create a line
line = ctkchart.CTkLine(master=chart)

# 3. Stream data in a background thread
def loop():
    while True:
        chart.show_data(line=line, data=[random.choice(range(100, 900))])
        time.sleep(1)

threading.Thread(target=loop, daemon=True).start()
root.mainloop()

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🎬 Live Examples

1 — Simple

▶️ View Simple Demo Video on GitHub

View code

import customtkinter as ctk
import ctkchart
import random
import threading
import time

root = ctk.CTk()
root.configure(fg_color="#0d1117")
root.geometry("720x430+200+200")

line_chart = ctkchart.CTkLineChart(
    master=root,
    x_axis_values=("01-01", "01-02", "01-03", "01-04", "01-05", "01-06", "01-07", "01-08", "01-09", "01-10"),
    y_axis_values=(0, 1000)
)
line_chart.pack(pady=15)

line = ctkchart.CTkLine(master=line_chart)

def display_data():
    while True:
        line_chart.show_data(line=line, data=[random.choice(range(0, 1000))])
        time.sleep(0.5)

threading.Thread(target=display_data, daemon=True).start()
root.mainloop()

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2 — Styled & Filled Line

▶️ View Styled & Filled Line Demo Video on GitHub

View code

import customtkinter as ctk
import ctkchart
import random
import threading
import time

root = ctk.CTk()
root.configure(fg_color="#0d1117")
root.geometry("720x430+200+200")

line_chart = ctkchart.CTkLineChart(
    master=root,
    x_axis_values=("01-01", "01-02", "01-03", "01-04", "01-05", "01-06", "01-07", "01-08", "01-09", "01-10"),
    y_axis_values=(0, 1000),
    y_axis_label_count=10,
)
line_chart.pack(pady=15)

line = ctkchart.CTkLine(
    master=line_chart,
    size=2,
    fill="enabled"
)

def display_data():
    while True:
        line_chart.show_data(line=line, data=[random.choice(range(0, 1000))])
        time.sleep(0.5)

threading.Thread(target=display_data, daemon=True).start()
root.mainloop()

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3 — 2 Lines with Different Styles

▶️ View 2 Lines Demo Video on GitHub

View code

import customtkinter as ctk
import ctkchart
import random
import threading
import time

root = ctk.CTk()
root.configure(fg_color=("#ffffff", "#0d1117"))
root.geometry("720x430+200+200")

line_chart = ctkchart.CTkLineChart(
    master=root,
    x_axis_values=("01-01", "01-02", "01-03", "01-04", "01-05", "01-06", "01-07", "01-08", "01-09", "01-10"),
    y_axis_values=(0, 1000),
    y_axis_label_count=10,
)
line_chart.pack(pady=15)

line1 = ctkchart.CTkLine(
    master=line_chart,
    color=("#5dffb6", "#5dffb6"),
    size=2,
    style="dashed",
    style_type=(10, 5),
)

line2 = ctkchart.CTkLine(
    master=line_chart,
    color=("#FFBAD2", "#FFBAD2"),
    size=2,
    point_highlight="enabled",
    point_highlight_color=("#FFBAD2", "#FFBAD2"),
)

def display_data():
    while True:
        line_chart.show_data(line=line1, data=[random.choice(range(0, 1000))])
        line_chart.show_data(line=line2, data=[random.choice(range(0, 1000))])
        time.sleep(0.5)

threading.Thread(target=display_data, daemon=True).start()
root.mainloop()

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4 — 3 Lines with Different Styles

▶️ View 3 Lines Demo Video on GitHub

View code

import customtkinter as ctk
import ctkchart
import random
import threading
import time

root = ctk.CTk()
root.configure(fg_color=("#ffffff", "#0d1117"))
root.geometry("720x430+200+200")

line_chart = ctkchart.CTkLineChart(
    master=root,
    x_axis_values=("01-01", "01-02", "01-03", "01-04", "01-05", "01-06", "01-07", "01-08", "01-09", "01-10"),
    y_axis_values=(0, 1000),
    y_axis_label_count=10,
)
line_chart.pack(pady=15)

line1 = ctkchart.CTkLine(master=line_chart, size=2, fill="enabled")

line2 = ctkchart.CTkLine(
    master=line_chart,
    color=("#5dffb6", "#5dffb6"),
    size=2,
    style="dashed",
    style_type=(10, 5),
)

line3 = ctkchart.CTkLine(
    master=line_chart,
    color=("#FFBAD2", "#FFBAD2"),
    size=2,
    point_highlight="enabled",
    point_highlight_color=("#FFBAD2", "#FFBAD2"),
)

def display_data():
    while True:
        line_chart.show_data(line=line1, data=random.choices(range(0, 1000), k=1))
        line_chart.show_data(line=line2, data=random.choices(range(0, 1000), k=1))
        line_chart.show_data(line=line3, data=random.choices(range(0, 1000), k=1))
        time.sleep(0.5)

threading.Thread(target=display_data, daemon=True).start()
root.mainloop()

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5 — With Grid Sections

▶️ View Grid Sections Demo Video on GitHub

View code

import customtkinter as ctk
import ctkchart
import random
import threading
import time

root = ctk.CTk()
root.configure(fg_color=("#ffffff", "#0d1117"))
root.geometry("720x430+200+200")

line_chart = ctkchart.CTkLineChart(
    master=root,
    x_axis_values=("01-01", "01-02", "01-03", "01-04", "01-05", "01-06", "01-07", "01-08", "01-09", "01-10"),
    y_axis_values=(0, 1000),
    y_axis_label_count=10,
    y_axis_section_count=10,
    x_axis_section_count=10,
)
line_chart.pack(pady=15)

line1 = ctkchart.CTkLine(
    master=line_chart,
    color=("#5dffb6", "#5dffb6"),
    size=2,
    style="dashed",
    style_type=(10, 5),
)

line2 = ctkchart.CTkLine(
    master=line_chart,
    color=("#FFBAD2", "#FFBAD2"),
    size=2,
    point_highlight="enabled",
    point_highlight_color=("#FFBAD2", "#FFBAD2"),
)

def display_data():
    while True:
        line_chart.show_data(line=line1, data=[random.choice(range(0, 1000))])
        line_chart.show_data(line=line2, data=[random.choice(range(0, 1000))])
        time.sleep(0.5)

threading.Thread(target=display_data, daemon=True).start()
root.mainloop()

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6 — Light and Dark theme

For every parameter that involves color in ctkchart, you can provide either:

• A single string representing the color.
• A tuple of two strings where the first string represents the color for the light theme and the second string represents the color for the dark theme.

▶️ View Dynamic Theme Demo Video on GitHub

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📚 Documentation

Explore all parameters, configuration methods, and advanced usage:

• 📖 English Documentation
• 🇨🇳 Chinese Documentation
• 🐍 PyPI Package

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👥 Contributors

• youyu