Add Python output/logging to troubleshoot empty screens on startup of built app (#58)

* Get all output and errors from a python program

* More responsive template for Flutter Flet app

* Added support for wrapping script

* Script running for Windows

* Update main.dart

* Update main.py

* PyRun_SimpleString for Windows

* Add web support to flet_example

* PyRun_SimpleString in Linux

* Simulating error in python script

* Fix main.dart for Windows

* Fix python app

* Use random TCP ports on Windows

* Catch exit code

* Disable buffering when redirecting output

* pyproject.toml support

* Added sample pyproject.toml

* Handle/bypass if __name__ == "__main__" check

* Added SSL config to a template

* Version bumped to 0.7.0

* Create _posixsubprocess.py

* Fix flet_example

Author: FeodorFitsner

src/serious_python/CHANGELOG.md

@@ -1,3 +1,9 @@
+## 0.7.0
+
+* `runPython()` method to support running Python script.
+* Updated `flet_example` to catch program output and errors, `sys.exit()` support.
+* `package` command to read dependencies from `pyproject.toml`.
+
 ## 0.6.1
 
 * `--exclude` option for `package` command - to exclude directories and files from Python app package.

src/serious_python/bin/package_command.dart

@@ -26,6 +26,7 @@ const webJunkFileExtensions = [
   ".dll"
 ];
 const junkFilesAndDirectories = ["__pycache__", "bin"];
+const tomlIgnoredDeps = ["python"];
 
 class PackageCommand extends Command {
   bool _verbose = false;
@@ -158,10 +159,42 @@ class PackageCommand extends Command {
           if (depSection is List) {
             dependencies = depSection.map((e) => e.toString()).toList();
           } else {
-            stdout.writeln(
-                "Warning: [dependencies] section of map type is not yet supported.");
-            // dependencies = List<String>.from(
-            //     depSection.keys.map((key) => '$key=${depSection[key]}'));
+            dependencies = List<String>.from(depSection.keys.map((key) {
+              if (tomlIgnoredDeps.contains(key)) {
+                return "";
+              }
+              var value = depSection[key];
+              var version = "";
+              var suffix = "";
+              if (value is Map) {
+                version = value["version"];
+                if (value["python"] != null) {
+                  suffix = ";python_version=='${value["python"]}'"
+                      .replaceAll("=='^", ">='")
+                      .replaceAll("=='~", "~='")
+                      .replaceAll("=='<", "<'")
+                      .replaceAll("=='>", ">'")
+                      .replaceAll("=='<=", "<='")
+                      .replaceAll("=='>=", ">='");
+                } else if (value["markers"] != null) {
+                  suffix = ";${value["markers"]}";
+                }
+              } else if (value is String) {
+                version = value;
+              }
+              var sep = "==";
+              if (version.startsWith("^")) {
+                sep = ">=";
+                version = version.replaceAll("^", "");
+              } else if (version.startsWith("~")) {
+                sep = "~=";
+                version = version.replaceAll("~", "");
+              } else if (version.contains(">") || version.contains("<")) {
+                sep = "";
+                version = version.replaceAll(" ", "");
+              }
+              return "$key$sep$version$suffix";
+            })).where((s) => s != "").toList();
           }
         }
       }
@@ -177,7 +210,8 @@ class PackageCommand extends Command {
             exit(3);
           }
           dependencies = dependencies
-              .map((d) => d.replaceAllMapped(RegExp(mapping[0] + r'(\W{1,}|$)'),
+              .map((d) => d.replaceAllMapped(
+                  RegExp(mapping[0] + r'([><=]{1,}|$)'),
                   (match) => '${mapping[1]}${match.group(1)}'))
               .toList();
         }
@@ -199,6 +233,9 @@ class PackageCommand extends Command {
         }
       }
 
+      // stdout.writeln(dependencies);
+      // exit(1);
+
       List<String> extraArgs = [];
       if (pre) {
         extraArgs.add("--pre");

src/serious_python/example/flask_example/macos/Podfile.lock

@@ -5,7 +5,7 @@ PODS:
   - path_provider_foundation (0.0.1):
     - Flutter
     - FlutterMacOS
-  - serious_python_darwin (0.6.1):
+  - serious_python_darwin (0.7.0):
     - Flutter
     - FlutterMacOS
 
@@ -29,8 +29,8 @@ SPEC CHECKSUMS:
   FlutterMacOS: 8f6f14fa908a6fb3fba0cd85dbd81ec4b251fb24
   package_info_plus: 02d7a575e80f194102bef286361c6c326e4c29ce
   path_provider_foundation: 29f094ae23ebbca9d3d0cec13889cd9060c0e943
-  serious_python_darwin: 6deda6a52f401fcf7e9b9a83c3a9387a9c08d599
+  serious_python_darwin: 0a8c46a529057f91064a327d9c4037e773eef339
 
 PODFILE CHECKSUM: 9ebaf0ce3d369aaa26a9ea0e159195ed94724cf3
 
-COCOAPODS: 1.12.1
+COCOAPODS: 1.14.3

src/serious_python/example/flask_example/pubspec.lock

@@ -302,42 +302,42 @@ packages:
       path: "../.."
       relative: true
     source: path
-    version: "0.6.1"
+    version: "0.7.0"
   serious_python_android:
     dependency: transitive
     description:
       path: "../../../serious_python_android"
       relative: true
     source: path
-    version: "0.6.1"
+    version: "0.7.0"
   serious_python_darwin:
     dependency: transitive
     description:
       path: "../../../serious_python_darwin"
       relative: true
     source: path
-    version: "0.6.1"
+    version: "0.7.0"
   serious_python_linux:
     dependency: transitive
     description:
       path: "../../../serious_python_linux"
       relative: true
     source: path
-    version: "0.6.1"
+    version: "0.7.0"
   serious_python_platform_interface:
     dependency: transitive
     description:
       path: "../../../serious_python_platform_interface"
       relative: true
     source: path
-    version: "0.6.1"
+    version: "0.7.0"
   serious_python_windows:
     dependency: transitive
     description:
       path: "../../../serious_python_windows"
       relative: true
     source: path
-    version: "0.6.1"
+    version: "0.7.0"
   sky_engine:
     dependency: transitive
     description: flutter

src/serious_python/example/flet_example/app/src/main.py

@@ -1,9 +1,16 @@
 import logging
+import sys
+import urllib.request
 
 import flet as ft
 from flet_core.version import version
 
-logging.basicConfig(level=logging.DEBUG)
+# logging.basicConfig(level=logging.DEBUG)
+
+print("Hello from Python!")
+print(__name__)
+
+# import aaa
 
 
 def main(page: ft.Page):
@@ -13,13 +20,23 @@ def main(page: ft.Page):
     txt_number = ft.TextField(value="0", text_align=ft.TextAlign.RIGHT, width=100)
 
     def minus_click(e):
+        print("Clicked minus button")
         txt_number.value = str(int(txt_number.value) - 1)
         page.update()
 
     def plus_click(e):
         txt_number.value = str(int(txt_number.value) + 1)
         page.update()
 
+    def check_ssl(e):
+        try:
+            with urllib.request.urlopen("https://google.com") as res:
+                result = "OK"
+        except Exception as ex:
+            result = str(ex)
+        page.show_dialog(ft.AlertDialog(content=ft.Text(result)))
+        # print(result)
+
     page.add(
         ft.Row(
             [
@@ -33,10 +50,18 @@ def plus_click(e):
             expand=True,
         ),
         ft.Row(
-            [ft.Text(f"Flet version: {version}")],
+            [
+                ft.Text(f"Flet version: {version}"),
+                ft.OutlinedButton("Check SSL", on_click=check_ssl),
+                ft.OutlinedButton("Exit app", on_click=lambda _: sys.exit(100)),
+            ],
+            wrap=True,
             alignment=ft.MainAxisAlignment.CENTER,
         ),
     )
 
+    print("This is inside main() method!")
+
 
-ft.app(main)
+if __name__ == "__main__":
+    ft.app(main)

src/serious_python/example/flet_example/app/src/pyproject.toml

@@ -0,0 +1,23 @@
+[tool.poetry]
+name = "my_project"
+version = "0.1.0"
+description = "My Project"
+authors = ["Author <[email protected]>"]
+license = "MIT"
+readme = "README.md"
+packages = [{include = "my_project"}]
+
+[tool.poetry.dependencies]
+python = "^3.8"
+flet = "^0.18.0"
+flet-contrib = { "version" = "~2023.8.18", markers = "python_version <= '3.4' or sys_platform == 'win32'" }
+flask = { "version" = ">=2.2.5, <3.0", python = "^3.2" }
+
+[tool.poetry.group.dev.dependencies]
+uvicorn = "^0.25.0"
+flet-fastapi = "^0.18.0"
+gunicorn = "^21.2.0"
+
+[build-system]
+requires = ["poetry-core"]
+build-backend = "poetry.core.masonry.api"

src/serious_python/example/flet_example/ios/Podfile.lock

@@ -48,7 +48,7 @@ PODS:
   - SDWebImage/Core (5.18.5)
   - sensors_plus (0.0.1):
     - Flutter
-  - serious_python_darwin (0.6.0):
+  - serious_python_darwin (0.7.0):
     - Flutter
     - FlutterMacOS
   - shared_preferences_foundation (0.0.1):
@@ -114,13 +114,13 @@ SPEC CHECKSUMS:
   package_info_plus: 115f4ad11e0698c8c1c5d8a689390df880f47e85
   path_provider_foundation: 29f094ae23ebbca9d3d0cec13889cd9060c0e943
   SDWebImage: 7ac2b7ddc5e8484c79aa90fc4e30b149d6a2c88f
-  sensors_plus: 5717760720f7e6acd96fdbd75b7428f5ad755ec2
-  serious_python_darwin: 0eaf3be753db71ab8f24d80644d5fb291f5968f0
+  sensors_plus: 42b9de1b8237675fa8d8121e4bb93be0f79fa61d
+  serious_python_darwin: 0a8c46a529057f91064a327d9c4037e773eef339
   shared_preferences_foundation: e2dae3258e06f44cc55f49d42024fd8dd03c590c
   SwiftyGif: 93a1cc87bf3a51916001cf8f3d63835fb64c819f
   url_launcher_ios: 08a3dfac5fb39e8759aeb0abbd5d9480f30fc8b4
   webview_flutter_wkwebview: 2e2d318f21a5e036e2c3f26171342e95908bd60a
 
 PODFILE CHECKSUM: 7be2f5f74864d463a8ad433546ed1de7e0f29aef
 
-COCOAPODS: 1.12.1
+COCOAPODS: 1.14.3