py_ratios.py

import datetime
import Fallen as fa
import plotly.express as px
import flet as ft
from flet.plotly_chart import PlotlyChart

def main(page: ft.Page):
    hoy = datetime.date.today()
    titulo = ''
    page.title = 'Calculadora de Ratios'
    page.horizontal_alignment = ft.alignment.center
    page.vertical_alignment = ft.alignment.top_center
    page.auto_scroll = True
    page.window_maximized = True
    alerta = ft.AlertDialog(
        title=ft.Text(
            '¡Error en los datos ingresados!\nTicker no Encontrado.',
        )
    )

    def abrir_alerta():
        page.dialog = alerta
        alerta.open = True
        page.update()

    def habilitar_controles():
        progreso.visible = False
        filas_datos.disabled = False
        boton_calcular.disabled = False
        page.update()

    def calcula_ratio(e):
        progreso.visible = True
        filas_datos.disabled = True
        boton_calcular.disabled = True
        page.update()

        try:
            historico_activo1 = fa.rava.get_history(
                ticker1.value,
                fecha_ini.value,
                fecha_fin.value,
        )
        except:
            abrir_alerta()
            habilitar_controles()
            return

        try:
            historico_activo2 = fa.rava.get_history(
                ticker2.value,
                fecha_ini.value,
                fecha_fin.value,
            )
        except:
            abrir_alerta()
            habilitar_controles()
            return
        ratio = historico_activo1.merge(
            historico_activo2,
            how='inner',
            on=['date']
        )
        ratio['ratio'] = ratio['close_x'] / ratio['close_y']
        titulo = f'Ratio {ticker1.value.upper()}/{ticker2.value.upper()}'
        fig = px.line(
            ratio,
            x='date',
            y='ratio',
            width=1900,
            height=750,
            title=titulo,
        )
        fig.add_hline(ratio['ratio'].mean(),)
        chart = PlotlyChart(fig, expand=True, )
        col.controls.pop(4)
        grafico = ft.Container(
            content=chart,
            alignment=ft.alignment.center
        )
        col.controls.append(grafico)
        habilitar_controles()

    ticker1 = ft.TextField(
        label='Ticker 1',
        tooltip='Para los distintos tipos de dólares usar:\n'\
                'DOLAR MEP, DOLAR CCL, DOLAR OFICIAL.',
        value='AL30',
    )
    ticker2 = ft.TextField(
        label='Ticker 2',
        tooltip='Para los distintos tipos de dólares usar:\n'\
                'DOLAR MEP, DOLAR CCL, DOLAR OFICIAL.',
        value='AL30D'
    )
    fecha_ini = ft.TextField(
        label='Fecha Desde',
        tooltip='(aaaa-mm-dd)',
        value='2022-01-01',
    )
    fecha_fin = ft.TextField(
        label='Fecha Hasta',
        tooltip='(aaaa-mm-dd)',
        value=hoy,
    )
    filas_datos = ft.Row(
        controls=[
            ticker1,
            ticker2,
            fecha_ini,
            fecha_fin,
        ],
        alignment=ft.MainAxisAlignment.CENTER, 
    )
    boton_calcular = ft.ElevatedButton(
        'Calcular Ratio',
        on_click=calcula_ratio,
        scale=1.5,
        color=ft.colors.WHITE,
    )
    contenedor_boton_calcular = ft.Container(
        content=boton_calcular,
        alignment=ft.alignment.center,
        margin=10,
    )
    progreso = ft.ProgressBar(
        visible=False,
    )
    fig = px.line(
        width=1900,
        height=750,
    )
    chart = PlotlyChart(
        fig,
        expand=True,
    )
    grafico = ft.Container(
        content=chart,
        alignment=ft.alignment.center
    )
    col = ft.Column(
        controls=[
            ft.Text(
                "Calculadora de Ratios\n",
                size=25,
                color=ft.colors.WHITE,
                text_align='CENTER',
            ),
            filas_datos,
            contenedor_boton_calcular,
            progreso,
            grafico,
        ],
        horizontal_alignment=ft.alignment.center,
    )

    contenedor = ft.Container(col)

    page.add(
        contenedor,
    )

ft.app(target=main)