无法导入cvxpy &无法导入名称和SolvingChain

Question

在导入cvxpy时似乎存在问题。我试过卸载和重新安装，但没有区别。以前，它只工作了几次，但没有改变任何东西，它突然停止工作，无法导入cvxpy。然后，这个问题就解决了，没有任何变化。但是，这一次问题仍然存在，我无法解决。如有任何建议或解决方案，将不胜感激。

错误：

ImportError: cannot import name 'SolvingChain' from 'cvxpy.reductions.solvers.solving_chain' (/opt/anaconda3/lib/python3.7/site-packages/cvxpy/reductions/solvers/solving_chain.py)

OS:

macOS高塞拉10.13.4 (17E199)-Retina

Python 3.7.6 (缺省值，2020年1月8日，13:42:34)

间谍4.1.1

CVX:

cvxpy 1.0.29 pypi_0 pypi

输出：

Traceback (most recent call last):
File "/Users/niloofar/EV.py", line 12, in
import cvxpy as cp
File "/opt/anaconda3/lib/python3.7/site-packages/cvxpy/init.py", line 22, in
from cvxpy.problems.problem import Problem
File "/opt/anaconda3/lib/python3.7/site-packages/cvxpy/problems/problem.py", line 23, in
from cvxpy.reductions.solvers.solving_chain import construct_solving_chain
File "/opt/anaconda3/lib/python3.7/site-packages/cvxpy/reductions/solvers/solving_chain.py", line 4, in
from cvxpy.reductions import (Chain, ConeMatrixStuffing, EvalParams,
File "/opt/anaconda3/lib/python3.7/site-packages/cvxpy/reductions/init.py", line 32, in
from cvxpy.reductions.solvers.solving_chain import SolvingChain
ImportError: cannot import name 'SolvingChain' from 'cvxpy.reductions.solvers.solving_chain' (/opt/anaconda3/lib/python3.7/site-packages/cvxpy/reductions/solvers/solving_chain.py)

Answer 1

解决方案：将cvxpy版本从1.0.29更改为1.0.28