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When building a flet apk through

flet build apk --include-package requests,

the flutter compiler fails with the following error.

Because flet 0.25.2 depends on http ^1.2.2 and requests >=4.1.0 depends on http ^0.13.4, flet 0.25.2 is incompatible with requests >=4.1.0. And because requests <4.1.0 doesn't support null safety, flet 0.25.2 is incompatible with requests. So, because urenregistratie depends on both flet 0.25.2 and requests any, version solving failed.

The lower bound of "sdk: '>=2.0.0 <3.0.0'" must be 2.12.0 or higher to enable null safety. For details, see https://dart.dev/null-safety

  • Flet version => 0.25.2
  • Flutter version => 3.24.5
  • Dart version => 3.5.4

the following ive tried:

  • downgrading flutter and dart
  • downgrading flet
  • upgrading flutter packages
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--include-packages is not meant for python packages, but instead Flutter packages. More info here.

To specify the requests package (or any other python dependency), you can create either a requirements.txt or pyproject.toml which contains your these. More info here. Example.

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You can add pure python packages using pyproject.toml which is created with your project folder. Here's what it should look like -

dependencies = [
  "flet==0.28.3",
  "flet-webview==0.1.0",
  "pandas==2.2.3", # Pandas is not a pure package but is already hosted on pypi.flet.dev hence we need to specify the version
  "websocket-client", # Pure Python package
  "requests" # Pure Python package
]
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