Lcapy is a Python library for symbolic linear circuit analysis and signal processing. It enables analysis of circuits in multiple domains (time, s-domain, frequency, discrete-time) using SymPy for symbolic mathematics. The library supports netlist-based circuit description, circuit solving via modified nodal analysis, transfer function analysis, noise analysis, state-space representation, and schematic generation using Circuitikz. It is designed for educational, research, and engineering applications in electrical engineering, providing both symbolic and numeric analysis capabilities.