I tried to run on Mac OS. But it was successfully run on Windows.

I failed so many times to install cvxpy and scipy and so on on Mac OS by anaconda

```
import numpy as np
import matplotlib.pyplot as plt
import cvxpy as cvx
f = np.array([[1, 1]])
A = np.array([[2, 1], [1, 2]])
b = np.array([[29], [25]])
lb = np.array([[2], [5]])
x = cvx.Variable(2, 1)
objective = cvx.Minimize(-f * x)
constraints = [A * x <= b, lb <= x]
prob = cvx.Problem(objective, constraints)
result = prob.solve()
print(x.value)
print(result)
```

Traceback (most recent call last):

File "", line 1, in File "/.../variable.py", line 75, in __init__raise TypeError("Variable name %s must be a string." % name)

TypeError: Variable name 1 must be a string.