How to encode URLs in Dart?
You are doing too much.In this case, you only need to do: parsedData = Uri.encodeComponent(STR_DATA); to get the same result as the Python code.
Use Dart Uri Class
var uri = 'http://example.com/path/to/page?name=ferret john';var encoded = Uri.encodeFull(uri);assert(encoded == 'http://example.com/path/to/page?name=ferret%20john');var decoded = Uri.decodeFull(encoded);assert(uri == decoded);