D:\code\dart\dartpy_demo1>dart --version
Dart SDK version: 2.17.5 (stable) (Tue Jun 21 11:05:10 2022 +0200) on "windows_x64"

D:\code\dart\dartpy_demo1>
D:\code\dart>dart create dartpy_demo1
Creating dartpy_demo1 using template console...

  .gitignore
  analysis_options.yaml
  CHANGELOG.md
  pubspec.yaml
  README.md
  bin\dartpy_demo1.dart
  lib\dartpy_demo1.dart
  test\dartpy_demo1_test.dart

Running pub get...
  Resolving dependencies...
  Changed 46 dependencies!

Created project dartpy_demo1 in dartpy_demo1! In order to get started, run the following commands:

  cd dartpy_demo1
  dart run


D:\code\dart>cd dartpy_demo1\

D:\code\dart\dartpy_demo1>dart pub add dartpy
Resolving dependencies...
+ dartpy 0.0.1+4
+ ffi 1.2.1 (2.0.1 available)
+ freezed_annotation 0.14.3 (2.0.3 available)
+ json_annotation 4.5.0
Downloading dartpy 0.0.1+4...
Changed 4 dependencies!

D:\code\dart\dartpy_demo1>dart pub add -d build_runner
Resolving dependencies...
+ build 2.3.0
+ build_config 1.0.0
+ build_daemon 3.1.0
+ build_resolvers 2.0.9
+ build_runner 2.1.11
+ build_runner_core 7.2.3
+ built_collection 5.1.1
+ built_value 8.3.3
+ checked_yaml 2.0.1
+ code_builder 4.1.0
+ dart_style 2.2.3
  ffi 1.2.1 (2.0.1 available)
+ fixnum 1.0.1
  freezed_annotation 0.14.3 (2.0.3 available)
+ graphs 2.1.0
+ pubspec_parse 1.2.0
+ stream_transform 2.0.0
+ timing 1.0.0
Downloading build_resolvers 2.0.9...
Downloading built_value 8.3.3...
Changed 16 dependencies!

D:\code\dart\dartpy_demo1>cat pubspec.yaml
name: dartpy_demo1
description: A sample command-line application.
version: 1.0.0
# homepage: https://www.example.com

environment:
  sdk: '>=2.17.5 <3.0.0'

# dependencies:
#   path: ^1.8.0

dev_dependencies:
  build_runner: ^2.1.11
  lints: ^2.0.0
  test: ^1.16.0
dependencies: {dartpy: ^0.0.1+4}

D:\code\dart\dartpy_demo1> # Make some modifications on the example code!
D:\code\dart\dartpy_demo1>cat lib\dartpy_demo1.dart
import 'package:dartpy/dartpy.dart';
import 'package:dartpy/dartpy_annotations.dart';
part 'dartpy_demo1.g.dart';

@PyFunction(module: 'multiply')
int multiply(int a, int b) => pymultiply(a, b);

@PyFunction(module: 'multiply', name: 'multiply')
double mult_double(double a, double b) => pymultiplydouble(a, b);

@PyFunction(module: 'multiply', name: 'multiply')
num mult_num(num a, num b) => pymultiplynum(a, b);

D:\code\dart\dartpy_demo1>cat lib\gen_dartpy_example.dart
import 'package:dartpy/dartpy.dart';
import 'package:dartpy/dartpy_annotations.dart';
part 'gen_dartpy_example.g.dart';

@PyFunction(module: 'multiply')
int multiply(int a, int b) => pymultiply(a, b);

@PyFunction(module: 'multiply', name: 'multiply')
double mult_double(double a, double b) => pymultiplydouble(a, b);

@PyFunction(module: 'multiply', name: 'multiply')
num mult_num(num a, num b) => pymultiplynum(a, b);

void main() {
  try {
    print(multiply(6, 4));
    print(mult_double(6.13, 5.2));
    print(mult_num(6, 5.2));
    print(mult_num(6, 2));
  } on DartPyException catch (e) {
    if (pyErrOccurred()) {
      dartpyc.PyErr_Print();
    }
    print(e.message);
  }
}

D:\code\dart\dartpy_demo1>cat bin\dartpy_demo1.dart
import 'package:dartpy/dartpy.dart';
import 'package:dartpy_demo1/dartpy_demo1.dart';

void main() {
  try {
    print(multiply(6, 4));
    print(mult_double(6.13, 5.2));
    print(mult_num(6, 5.2));
    print(mult_num(6, 2));
  } on DartPyException catch (e) {
    if (pyErrOccurred()) {
      dartpyc.PyErr_Print();
    }
    print(e.message);
  }
}

D:\code\dart\dartpy_demo1>dart run build_runner build
[INFO] Generating build script completed, took 324ms
[SEVERE] Nothing can be built, yet a build was requested.
[INFO] Reading cached asset graph completed, took 45ms
[INFO] Checking for updates since last build completed, took 498ms
[INFO] Running build completed, took 4ms
[INFO] Caching finalized dependency graph completed, took 28ms
[INFO] Succeeded after 45ms with 0 outputs (0 actions)

D:\code\dart\dartpy_demo1>dart run
Building package executable...
Failed to build dartpy_demo1:dartpy_demo1:
lib/dartpy_demo1.dart:3:6: Error: Error when reading 'lib/dartpy_demo1.g.dart': The system cannot find the file specified.

part 'dartpy_demo1.g.dart';
     ^
lib/dartpy_demo1.dart:3:6: Error: Can't use 'lib/dartpy_demo1.g.dart' as a part, because it has no 'part of' declaration.
part 'dartpy_demo1.g.dart';
     ^
lib/dartpy_demo1.dart:6:31: Error: Method not found: 'pymultiply'.
int multiply(int a, int b) => pymultiply(a, b);
                              ^^^^^^^^^^
lib/dartpy_demo1.dart:9:43: Error: Method not found: 'pymultiplydouble'.
double mult_double(double a, double b) => pymultiplydouble(a, b);
                                          ^^^^^^^^^^^^^^^^
lib/dartpy_demo1.dart:12:31: Error: Method not found: 'pymultiplynum'.
num mult_num(num a, num b) => pymultiplynum(a, b);
                              ^^^^^^^^^^^^^
Failed to build dartpy_demo1:dartpy_demo1:
lib/dartpy_demo1.dart:3:6: Error: Error when reading 'lib/dartpy_demo1.g.dart': The system cannot find the file specified.

part 'dartpy_demo1.g.dart';
     ^
lib/dartpy_demo1.dart:3:6: Error: Can't use 'lib/dartpy_demo1.g.dart' as a part, because it has no 'part of' declaration.
part 'dartpy_demo1.g.dart';
     ^
lib/dartpy_demo1.dart:6:31: Error: Method not found: 'pymultiply'.
int multiply(int a, int b) => pymultiply(a, b);
                              ^^^^^^^^^^
lib/dartpy_demo1.dart:9:43: Error: Method not found: 'pymultiplydouble'.
double mult_double(double a, double b) => pymultiplydouble(a, b);
                                          ^^^^^^^^^^^^^^^^
lib/dartpy_demo1.dart:12:31: Error: Method not found: 'pymultiplynum'.
num mult_num(num a, num b) => pymultiplynum(a, b);
                              ^^^^^^^^^^^^^

D:\code\dart\dartpy_demo1>