event-calplot

A Python library for creating beautiful calendar heatmaps with Plotly.

Features

• GitHub-style calendar heatmaps
• Customizable colors and styling
• Multi-language support (English, Korean)
• Built on Plotly for interactive visualizations
• Event highlighting
• Multi-year support

Installation

Using pip

pip install event-calplot

Using uv

uv add event-calplot

Quick Start

import pandas as pd
from event_calplot import create_calendar_heatmap

df = pd.DataFrame({
    'date': pd.date_range('2024-01-01', '2024-12-31'),
    'value': range(366)
})

# Create heatmap
fig = create_calendar_heatmap(
    data=df,
    date_col='date',
    value_col='value',
    year=2024
)
fig.show()

Examples

Add Event

import numpy as np
import pandas as pd
from event_calplot import create_calendar_heatmap

# Create sample data
df = pd.DataFrame(
    data={
        "date": pd.date_range(start="2024-01-01", end="2024-12-31"),
        "value": np.random.randint(0, 100, size=366),
    }
)

# Event dates
event_dates = pd.to_datetime(
    arg=[
        "2024-01-01",
        "2024-02-14",
        "2024-03-01",
        "2024-10-03",
        "2024-10-09",
        "2024-12-25",
    ]
)

# Create heatmap
fig = create_calendar_heatmap(
    data=df,
    date_col="date",
    value_col="value",
    year=2024,
    min_color="#eff2f5",
    max_color="#116329",
    line_color="#cccccc",
    event_dates=event_dates,
    event_color="#b64f17",
)
fig.show()

API Reference

create_calendar_heatmap

Create a calendar heatmap for a single year.

Parameters:

• data (pd.DataFrame): DataFrame containing date and value columns
• date_col (str): Name of the date column
• value_col (str): Name of the value column
• year (int): Year to visualize
• language (Literal["en", "ko"], default="en"): Language for labels
• min_color (str, default="#eeeeee"): Color for minimum values
• max_color (str, default="#678fae"): Color for maximum values
• line_color (str, default="#9e9e9e"): Color for month separator lines
• line_width (float, default=1.5): Width of month separator lines
• height (int, default=250): Height of the plot in pixels
• hover_template (Optional[str], default=None): Custom hover template
• event_dates (Optional[List[pd.Timestamp]], default=None): Dates to highlight
• event_color (str, default="#76cf61"): Color for event markers

Returns: plotly.graph_objs.Figure

create_multi_year_heatmap

Create calendar heatmaps for all years in the data.

Parameters:

• data (pd.DataFrame): DataFrame containing date and value columns
• date_col (str): Name of the date column
• value_col (str): Name of the value column
• language (Literal["en", "ko"], default="en"): Language for labels
• **kwargs: Additional arguments passed to create_calendar_heatmap

Returns: list[plotly.graph_objs.Figure]

Architecture

The package is organized into modular components:

• preprocessing.py: Data preprocessing and transformation functions
• layout.py: Plotly layout configuration
• traces.py: Trace creation for heatmaps and lines
• heatmap.py: Main API functions

This modular design ensures:

• Each function has a single responsibility
• Easy testing and maintenance
• Clear separation of concerns
• Reusable components

License

MIT License - see LICENSE file for details

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

Author

Q07K(Gyuhyeong Kim) (kgh0730@gmail.com)

Links

• GitHub: https://github.com/Q07K/event-calplot
• PyPI: https://pypi.org/project/event-calplot/