TypeError: Object of type function is not JSON serializable

[gsal]

Will somebody be kind enough to run this program and help figure what I am doing wrong?

The only requirement is pandas.

Short description of program:

• input variables and their values are kept in a dictionary
• I use a foreach and the keys to programmatically setup number_input widgets for each and all input variables in one shot
• calculated variables and their values are also kept in a dictionary, but then transferred to a pandas dataframe....
• it is this dataframe that I would like to display via a datatable have it automatically refreshed in the browser every time an input variable is changed

The program, as is, does open in a browser, but as soon as I enter a value, I get the not JSON serializable error.

from pcconfig import config
import pynecone as pc
import pandas as pd


def is_float(fos) -> bool:
    """ Returns True if string can be converted to a floating-point number. """
    try:
        float(fos)
        return True
    except ValueError:
        return False


class State(pc.State):

    # - - - - - - - - - - - - - - - - - - - - -
    # input Air variables

    # variable names and their units
    uAir: dict[str,str] = {
        "Density_at_inlet"      : "kg/m^3",
        "Viscosity"             : "Pa-s",
        "Specific_heat"         : "J/kg-K",
        "Thermal_conductivity"  : "W/m-K",
        "Resistivity"           : "ohm-m",
    }

    # variables names
    vAir: list = list(uAir.keys())

    # variable names and ther values, defaulting to 0.0
    Air: dict[str,float] = { v:0.0 for v in vAir }

    # - - - - - - - - - - - - - - - - - - - - -
    # calculated Air variables

    # variable names and their units
    _ucAir: dict[str,str] = {
        "Prandtl_No"    : "-",
    }

    # variables names
    _vcAir: list = list(_ucAir.keys())

    # variable names and ther values, defaulting to 0.0
    _cAir: dict[str,float] = { v:0.0 for v in _vcAir }

    # - - - - - - - - - - - - - - - - - - - - -

    def Prandtl_No(self) -> float:
        try:
            val = self.Air['Specific_heat'] * self.Air['Viscosity'] / self.Air['Thermal_conductivity']  # [-]
        except:
            val = -99.9
        finally:
            return val

    def calculate_Air(self):
        self._cAir['Prandtl_No'] = self.Prandtl_No()
        # for vname in self._vcAir:
        #     f = getattr(self,vname)
        #     self._cAir[vname] = f()

    def input_Air(self,vval,vstr):
        if is_float(vval):
            self.Air[vstr] = float(vval)
        return self.calculate_Air

    @pc.var
    def cAir_df(self) -> pd.DataFrame:
        return pd.DataFrame({'Description':self._cAir.keys(), 'Value':self._cAir.values(), 'Units':self._ucAir.values()},
                            index=self._vcAir)


def air_number_input(vstr):
    return pc.hstack(
                pc.text(vstr, font_size="0.8em", width="12em"),
                pc.number_input(on_change=lambda f: State.input_Air(f,vstr),
                                input_mode="decimal",
                                variant="outline",
                                font_size="0.8em"),
                pc.text(State.uAir[vstr], font_size="0.8em", width="12em"),
            )

def index():
    return pc.center(
                pc.vstack(
                    pc.foreach(State.vAir, air_number_input),
                    pc.data_table(
                        data=State.cAir_df,
                        pagination=True,
                        search=True,
                        sort=True,
                    ),
                ),
            )

# Add state and page to the app.
app = pc.App(state=State)
app.add_page(index)
app.compile()

[Alek99]

Sure I run it locally

[Alek99]

Ok there seems to be an issue with our pc.data_table a couple others have reported an error with this. I am planning on putting a fix for this tomorrow and releasing a new version, sorry for the error.

[gsal]

Great, thank you very much; looking forward to Pynecone 0.1.17 ;-)