Pipes

The | operator customizes where a command gets its input from and what it does with its output. Depending on the types of the operands, different behaviors emerge.

Overview

Left operand	Right operand	Behavior
PipePy	PipePy	Shell-like pipe: left stdout → right stdin
Iterable (incl. string)	PipePy	Elements fed to command's stdin
PipePy	Function	Process output with Python function
PipePy	Generator	Bidirectional streaming via yield/send

For shell users, this is analogous to piping, but with Python objects anywhere in the chain.