# Aprende Funciones Lambda Construyendo un Rastreador de Gasto - Paso 12

**URL:** <https://forum.freecodecamp.org/t/aprende-funciones-lambda-construyendo-un-rastreador-de-gasto-paso-12/720604>\
**Category:** General\
**Tags:** español\
**Created:** [November 14, 2024, 2:48pm UTC](https://forum.freecodecamp.org/t/aprende-funciones-lambda-construyendo-un-rastreador-de-gasto-paso-12/720604 "2024-11-14T14:48:48Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![Drumond](https://sea3.discourse-cdn.com/freecodecamp/user_avatar/forum.freecodecamp.org/drumond/32/259375_2.png) [@Drumond](https://forum.freecodecamp.org/u/Drumond)\
**Post date:** [November 14, 2024, 2:48pm UTC](https://forum.freecodecamp.org/t/aprende-funciones-lambda-construyendo-un-rastreador-de-gasto-paso-12/720604/1 "2024-11-14T14:48:48Z")

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### Cuéntanos qué está pasando:

can proceed, I implement the dictionary and use the .append but don’t work def add\_expense(expenses, amount, category):  
expense = {  
‘amount’: amount  
}  
expenses.append(expense)

### Tu código hasta el momento

````py

# User Editable Region

```def add_expense(expenses, amount, category):
    expense = {
        'amount': amount
    }
    expenses.append(expense)`Preformatted text`

# User Editable Region

expenses = []

````

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### Información del Desafío:

Aprende Funciones Lambda Construyendo un Rastreador de Gasto - Paso 12

> **[freeCodeCamp.org](https://www.freecodecamp.org/espanol/learn/scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/step-12)**
>
> Aprende a programar, ¡GRATIS!

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<div class="post-metadata">

**Author:** ![Teller](https://sea3.discourse-cdn.com/freecodecamp/user_avatar/forum.freecodecamp.org/teller/32/412338_2.png) [@Teller](https://forum.freecodecamp.org/u/Teller)\
**Post date:** [November 14, 2024, 7:35pm UTC](https://forum.freecodecamp.org/t/aprende-funciones-lambda-construyendo-un-rastreador-de-gasto-paso-12/720604/2 "2024-11-14T19:35:24Z")

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Bienvenido de nuevo al foro @Drumond

Para este paso no se le pide que cree una variable.

Feliz codificación

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<div class="post-metadata">

**Author:** ![Drumond](https://sea3.discourse-cdn.com/freecodecamp/user_avatar/forum.freecodecamp.org/drumond/32/259375_2.png) [@Drumond](https://forum.freecodecamp.org/u/Drumond)\
**Post date:** [November 19, 2024, 4:16pm UTC](https://forum.freecodecamp.org/t/aprende-funciones-lambda-construyendo-un-rastreador-de-gasto-paso-12/720604/3 "2024-11-19T16:16:07Z")

</div>

but I created a dictionary no variable :s I have no sure to understand you response sorry can you specify a little more pls? ty

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<div class="post-metadata">

**Author:** ![Drumond](https://sea3.discourse-cdn.com/freecodecamp/user_avatar/forum.freecodecamp.org/drumond/32/259375_2.png) [@Drumond](https://forum.freecodecamp.org/u/Drumond)\
**Post date:** [November 19, 2024, 4:18pm UTC](https://forum.freecodecamp.org/t/aprende-funciones-lambda-construyendo-un-rastreador-de-gasto-paso-12/720604/4 "2024-11-19T16:18:22Z")

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Sorry friend, I resolve the issue, after analyze you response! Thank you for you help

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<div class="post-metadata">

**Author:** ![ILM](https://sea3.discourse-cdn.com/freecodecamp/user_avatar/forum.freecodecamp.org/ilm/32/363239_2.png) [@ILM](https://forum.freecodecamp.org/u/ILM)\
**Post date:** [January 16, 2026, 5:22pm UTC](https://forum.freecodecamp.org/t/aprende-funciones-lambda-construyendo-un-rastreador-de-gasto-paso-12/720604/5 "2026-01-16T17:22:07Z")

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Closed on January 16, 2026, 5:22pm UTC