To install wasmtime-py, run this command in your terminal:
$ pip install wasmtimeThe package currently supports 64-bit builds of Python 3.6+ on x86_64 Windows, macOS, and Linux
In this example, we compile and instantiate a WebAssembly module and use it from Python:
from wasmtime import Store, Module, Instance, Func, FuncType
store = Store()
module = Module(store, """
(module
(func $hello (import "" "hello"))
(func (export "run") (call $hello))
)
""")
def say_hello():
print("Hello from Python!")
hello = Func(store, FuncType([], []), say_hello)
instance = Instance(store, module, [hello])
run = instance.exports["run"]
run()Be sure to check out the examples directory, which has other usage patterns
as well as the full API documentation of the wasmtime-py package.
If your WebAssembly module works this way, then you can also import the WebAssembly module directly into Python without explicitly compiling and instantiating it yourself:
# Import the custom loader for `*.wasm` files
import wasmtime.loader
# Assuming `your_wasm_file.wasm` is in the python load path...
import your_wasm_file
# Now you're compiled and instantiated and ready to go!
print(your_wasm_file.run())See CONTRIBUTING.md.