問(wèn)題描述

所以我想使用此代碼在按下按鈕時(shí)調(diào)用函數(shù):

So I whant to use this code to call a function on a button press:

botao_ok.bind(on_press=f_adicionar_socios(txt_n_socio.text,txt_nome.text,txt_filho_de.text,txt_filho_e_de.text,txt_data_nas.text,txt_tipo_ID.text,txt_num_ID.text,txt_NIF.text,txt_morada_rua.text,txt_morada_localidade.text,txt_codigo_postal.text,txt_tel_fixo.text,txt_telemovel.text,txt_email.text,txt_tipo_socio.text,txt_data_admicao.text,txt_zona.text,txt_actividade.text,txt_actividade_de.text,txt_actividade_ate.text,txt_observacoes.text))

但為了簡(jiǎn)單起見(jiàn)，我只需要解決這個(gè)問(wèn)題:

But to keep it simple, I only need to solve this problem:

#My Function
def teste_(nome):
    print nome
#Button
botao_ok.bind(on_press=teste_('Ola'))
# Button is inside a Class MYApp

它給出了錯(cuò)誤:AssertionError: None is not callable

and it gives the error: AssertionError: None is not callable

我已經(jīng)嘗試了所有我強(qiáng)硬的方法但無(wú)法解決這個(gè)問(wèn)題......謝謝

Ive tryied everything I tough off and can't solve this... Thank you

推薦答案

當(dāng)你編寫(xiě) teste_('Ola') 函數(shù)運(yùn)行并返回 None

When you write teste_('Ola') the function runs and returns None

所以當(dāng)你寫(xiě)的時(shí)候

botao_ok.bind(on_press=teste_('Ola'))

它實(shí)際上被設(shè)置為:

botao_ok.bind(on_press=None)

簡(jiǎn)而言之，這是導(dǎo)致您的問(wèn)題的原因.

Which in short is causing your problem.

為了讓它調(diào)用 teste_('Ola') 當(dāng)按鈕被按下時(shí)，你可以使用 lambda 函數(shù):

In order to get it to call teste_('Ola') When the button is pressed, you could use a lambda function:

botao_ok.bind(on_press=lambda x:teste_('Ola'))

這篇關(guān)于Python，Kivy，“AssertionError: None is not callable"按鈕調(diào)用函數(shù)時(shí)出錯(cuò)的文章就介紹到這了，希望我們推薦的答案對(duì)大家有所幫助，也希望大家多多支持html5模板網(wǎng)！