Schemdraw is a Python package for producing high-quality electrical circuit schematic diagrams. It allows users to create diagrams by adding circuit elements one at a time using Python methods. It supports a wide range of components including resistors, capacitors, diodes, transistors, opamps, logic gates, and can also generate timing diagrams, state machine diagrams, and flowcharts. The current version is 0.22 and it has an active development and release cadence.
pip install schemdrawVerified import paths — ran on the pinned version, not inferred.
This quickstart code creates a simple RC circuit diagram and saves it as an SVG file. The `with schemdraw.Drawing():` context manager is the recommended modern approach for creating and saving drawings, handling display and saving automatically upon exit.
Upgrade to schemdraw version 0.14 or newer. Alternatively, for older versions, instantiate `Drawing` directly and use `d.add()` or `d +=` followed by `d.draw()` and `d.save()` outside a `with` block.
To prevent this, set the Matplotlib backend to a non-GUI option (e.g., `matplotlib.use('Agg')`) *before* importing schemdraw. Instead of `d.draw()`, use `d.save('filename.svg')` to save the output or `d.get_imagedata()` to retrieve image data.Refactor custom `ElementCompound` subclasses to move segment definitions from `__init__` to a `setup` method.
Call `logicparse` directly, e.g., `d = logicparse('expression')`, and then call `d.draw()` or `d.save()` on the returned Drawing object.pip install schemdraw
from schemdraw.elements import Resistor
pip install matplotlib
import schemdraw; from schemdraw.elements import Resistor; d = schemdraw.Drawing(); d += Resistor(); d.draw()