TextCompose

TextCompose is a Python library for creating dynamic, structured text templates with an intuitive, component-based approach. Inspired by aiogram-dialog.

✨ Features

• 🧱 Flexible text composition from components
• 🔀 Conditional rendering support (when)
• 🔁 Grouping and repeating blocks
• 🎨 Formatting via f-string and Jinja2
• 🔌 Easily extensible with new components

🚀 Installation

uv add textcompose
# or
pip install textcompose

🧩 Components Overview

General

• Template — main class for combining and rendering components

Elements

Element — abstract base class for all element components

• Text — static text.
• Format — dynamic python f-string formatting
• Jinja — Jinja2 template rendering
• ProgressBar — show progress visually

Containers

Container — abstract base class for all container components

• Group — group children with custom separators.
• List — repeat templates for each item in a collection.

Logic Components

Logic — abstract base class for all container components

• If — conditionally show different blocks (use if_, then_, else_)

Tip

All components support the when parameter for conditional display (value, expression, function, or magic_filter).

⚡️ How to Use

All usage examples can be found in the example folder.

Quick Start

See how easy it is to build structured, interactive text blocks:

from magic_filter import F

from textcompose import Template
from textcompose.containers import Group, List
from textcompose.elements import Format, Jinja, Text
from textcompose.logics import If

template = Template(
    Format("Hello, {name}!"),
    Format("Status: {status}"),  # or `lambda ctx: f"Status: {ctx['status']}"` with function
    If(
        F["notifications"] > 0,  # `if_`: condition to check if there are notifications
        Format("You have {notifications} new notifications."),  # `then_`: content to render if condition is True
        Format("You not have new notifications."),  # `else_`: content to render if condition is False
    ),
    Group(
        Jinja("\nTotal messages {{ messages|length }}:"),
        List(
            Format("Time - {item[time]}:"),
            Format("-  {item[text]}"),
            sep="\n",  # `sep`: separator between list items
            inner_sep="\n",  # `inner_sep`: separator between parts of a single item
            getter=lambda ctx: ctx["messages"],  # `getter`: function or F to extract the list of messages from context
        ),
        sep="\n",  # `sep`: separator between children of Group
        when=F["messages"].len() > 0,  # `when`: show this block only if there are messages
    ),
    Text("\nThank you for using our service!"),  # or "Recent messages:" without class
)

context = {
    "name": "Alexey",
    "status": "Online",
    "notifications": 2,
    "messages": [
        {"text": "Your package has been delivered.", "time": "09:15"},
        {"text": "Reminder: meeting tomorrow at 10:00.", "time": "18:42"},
    ],
}

print(template.render(context))

Output:

Hello, Alexey!
Status: Online
You have 2 new notifications.

Total messages 2:
Time - 09:15:
-  Your package has been delivered.
Time - 18:42:
-  Reminder: meeting tomorrow at 10:00.

Thank you for using our service!

ProgressBar

The ProgressBar component renders a textual progress bar. It supports various styles, customizable width, templates, and dynamic values.

Usage

from textcompose.elements import ProgressBar

bar = ProgressBar(
    current=42,  # `current`: Current progress value
    total=100,  # `total`: Total value for the progress bar
    width=20,  # `width`: Number of characters in the bar.
    style="symbol_square",  # `style`: Style (string — built-in style name, or `ProgressBarStyle` object).
)
print(bar.render({}))

Output:

[■■■■■■■■        ] 42%

Styles

Built-in styles are listed in the PROGRESS_BAR_STYLES dictionary (see textcompose/styles/progress_bar.py). Examples:

• "symbol_square": [■■■■■ ]
• "symbol_classic": [#####-----]
• "emoj_square": 🟩🟩🟩⬜⬜⬜
• "emoji_circle": 🟢🟢⚪⚪⚪

You can create a custom style using ProgressBarStyle:

from textcompose.styles import ProgressBarStyle
from textcompose.elements import ProgressBar


custom_style = ProgressBarStyle(
    left="<", fill="*", empty="-", right=">", template="{percent} {left}{bar}{right}"
)
bar = ProgressBar(current=7, total=10, width=10, style=custom_style)
print(bar.render({}))

Output:

70% <*******--->

Template

The template parameter in the style allows you to customize the output string. Available placeholders:

• {left} — left border
• {bar} — the bar itself (filled + empty part)
• {right} — right border
• {percent} — percent complete (e.g., 42%)
• {total} — maximum value
• {current} — current value

🤝 Contributing

💡 Ideas? Issues? PRs are welcome!
Open an issue or pull request to help TextCompose get even better.

Ready to supercharge your text formatting?
Try TextCompose today and make your bots, reports, and notifications shine! ✨