REPL

The ZPy REPL (Read-Eval-Print Loop) provides an interactive environment for experimenting with ZPy code.

Starting the REPL

# Start REPL directly
zpy

# Or explicitly
zpy repl

# Or with -i flag
zpy -i

REPL Features

Multi-line Input

The REPL automatically detects incomplete statements and continues on the next line:

>>> def greet(name):
...     print("Hello,", name)
...
>>> greet("World")
Hello, World

Run File Then REPL

Use -i to run a script and then enter the REPL:

zpy -i script.zpy

This is useful for debugging - you can inspect variables after the script runs:

# script.zpy
x = 10
y = 20

$ zpy -i script.zpy
Script executed. Entering REPL...
>>> x
10
>>> y
20
>>> x + y
30

REPL Commands

Command	Description
exit()	Exit the REPL
Ctrl+C	Cancel current input
Ctrl+D	Exit REPL (Unix)

Tips

Quick Calculations

>>> 2 ** 10
1024
>>> 100 / 7
14.285714285714286

Test Functions

>>> def factorial(n):
...     if n <= 1:
...         return 1
...     return n * factorial(n - 1)
...
>>> factorial(5)
120
>>> factorial(10)
3628800

Inspect Values

>>> items = [1, 2, 3, 4, 5]
>>> len(items)
5
>>> type(items)
list