小编div*_*ck1的帖子

我正在尝试解决非线性优化问题。我通过创建下面的代码来复制我的问题。Python返回TypeError: object of type 'int' has no len()。如何在约束函数中包含IF语句？

控制台将打印以下内容：

  File "<ipython-input-196-8d29d410dcea>", line 1, in <module>
    runfile('C:/Users/***/Documents/***/Project/untitled.py', wdir='C:/Users/***/Documents/***/***/Project')

  File "C:\Users\***\Anaconda3\lib\site-packages\spyder_kernels\customize\spydercustomize.py", line 704, in runfile
    execfile(filename, namespace)

  File "C:\Users\***\Anaconda3\lib\site-packages\spyder_kernels\customize\spydercustomize.py", line 108, in execfile
    exec(compile(f.read(), filename, 'exec'), namespace)

  File "C:/Users/***/Documents/***/***/Project/untitled.py", line 27, in <module>
    m.Equation(Cx(x1,x2,x3,x4) < 0)

  File "C:/Users/***/Documents/***/***/Project/untitled.py", line 17, in Cx
    if K > 15:

  File "C:\Users\***\Anaconda3\lib\site-packages\gekko\gk_operators.py", line 25, in __len__
    return len(self.value)

  File "C:\Users\***\Anaconda3\lib\site-packages\gekko\gk_operators.py", line 134, in __len__
    return len(self.value)

TypeError: object of type 'int' has no len() …