[Python] How to properly implement API calls in Android Fragment using Coroutines and Retrofit?

Im trying to make a app in android studio about calculating descriptors from a molecule with SMILES. I use Kotlin for my app and for HTTP-client retrofit. But for calculating descriptors, I use Python. The library I using for calculating descriptors is rdkit. Because I need to somehow show the results to TextViews, I tried to use Chaquopy. But Chaquopy is not compatible with rdkit. So I decided to use a API. In the app you enter a SMILES and it will then send to the API, the descriptors will be calculated and than will be send back to the app. The results will be displayed in TextViews.I have made the API with Flask and deployed in Render. But an error occured for some reason: Unresolved reference 'calculateprop_a'.:64 (and) Unresolved reference 'calculateprop_b'.:67

//fragment file

val response1 = Utils.api.calculateprop_a(SmileRequest(smiles))
val response2 = Utils.api.calculateprop_b(SmileRequest(smiles))


It seems that Android Studio does not recognize the functions, although I have imported them. They are also present in the interface file.

//fragment file

package com.example.myapplication

import android.os.Bundle
import androidx.fragment.app.Fragment
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.Button
import android.widget.EditText
import android.widget.ProgressBar
import android.widget.TextView
import android.widget.Toast
import com.chaquo.python.Python
import com.example.myapplication.models.Response1
import com.google.firebase.appdistribution.gradle.ApiService
import com.example.myapplication.models.SmileRequest
import com.example.myapplication.utils.Utils
import kotlinx.coroutines.CoroutineScope
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.launch
import kotlinx.coroutines.withContext
import retrofit2.Response


//interface file (ApiService.kt)

package com.example.myapplication

import com.example.myapplication.models.Response1
import com.example.myapplication.models.Response2
import com.example.myapplication.models.SmileRequest
import retrofit2.Response
import retrofit2.http.Body
import retrofit2.http.POST

interface ApiService {
@POST("/prop1")
suspend fun calculateprop_a(@Body request: SmileRequest): Response<Response1>
@POST("/prop2")
suspend fun calculateprop_b(@Body request: SmileRequest): Response<Response2>
}


In dataclass file do I also not find any mistakes.

//dataclsaa file (SmileRequest.kt)

package com.example.myapplication.models

//[molw, logp, rotb, tpsa, numhdon, numhacp]
data class SmileRequest(val smiles: String)
data class Response1(
val status: String?,
val smiles: String?,
val molwt: Double?,
val logp: Double?,
val rotb: Int?,
val tpsa: Double?,
val numhdon: Int?,
val numhacp: Int?,
val error: String?
)

//[wie_index, bal_index, ran_index, zgr_m1, zgr_m2, tp, surf_area]
data class Response2(
val smiles: String?,
val wie_index: Double?,
val bal_index: Double?,
val ran_index: Double?,
val zgr_m1: Double?,
val zgr_m2: Double?,
val tp: Double?,
val surf_area: Double?,
val error: String?
)


Likewise in object file.

//object file (Utils.kt)

package com.example.myapplication.utils

import com.google.firebase.appdistribution.gradle.ApiService
import retrofit2.Retrofit
import retrofit2.converter.gson.GsonConverterFactory

object Utils {
private const val BASE_URL = "secret"

val api: ApiService by lazy {
Retrofit.Builder()
.baseUrl(BASE_URL)
.addConverterFactory(GsonConverterFactory.create())
.build()
.create(ApiService::class.java)
}
}


Don´t really know what to do. I´m new in API field. So, I hope for help.

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