问题描述
所以我想使用此代码在按下按钮时调用函数:
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))
但为了简单起见，我只需要解决这个问题:
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
它给出了错误:AssertionError: None is not callable
and it gives the error: AssertionError: None is not callable
我已经尝试了所有我强硬的方法但无法解决这个问题......谢谢
Ive tryied everything I tough off and can't solve this... Thank you
推荐答案
当你编写 teste_('Ola') 函数运行并返回 None
When you write teste_('Ola') the function runs and returns None
所以当你写的时候
botao_ok.bind(on_press=teste_('Ola'))
它实际上被设置为:
botao_ok.bind(on_press=None)
简而言之，这是导致您的问题的原因.
Which in short is causing your problem.
为了让它调用 teste_('Ola') 当按钮被按下时，你可以使用 lambda 函数:
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'))
这篇关于Python，Kivy，“AssertionError: None is not callable"按钮调用函数时出错的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持跟版网！