导入 IbPy2 和 backtrader 的正确方法是什么？

Question

Hi i am having trouble importing backtrader and IbPy2. When i pip install both and when i run import backtrader in my python shell i get the following error:

i pip installed these:

pip install https://github.com/blampe/IbPy/archive/master.zip

pip install backtrader

The error i encountered:

Traceback (most recent call last):

  File ~/opt/anaconda3/lib/python3.9/site-packages/IPython/core/interactiveshell.py:3369 in run_code
    exec(code_obj, self.user_global_ns, self.user_ns)

  Input In [3] in <cell line: 1>
    import backtrader as bt

  File ~/opt/anaconda3/lib/python3.9/site-packages/backtrader/__init__.py:62 in <module>
    from .cerebro import *

  File ~/opt/anaconda3/lib/python3.9/site-packages/backtrader/cerebro.py:35 in <module>
    from .brokers import BackBroker

  File ~/opt/anaconda3/lib/python3.9/site-packages/backtrader/brokers/__init__.py:30 in <module>
    from .ibbroker import IBBroker

  File ~/opt/anaconda3/lib/python3.9/site-packages/backtrader/brokers/ibbroker.py:30 in <module>
    import ib.ext.Order

  File ~/opt/anaconda3/lib/python3.9/site-packages/ib/ext/Order.py:9 in <module>
    from ib.lib import Double, Integer

  File ~/opt/anaconda3/lib/python3.9/site-packages/ib/lib/__init__.py:239
    except (socket.error, ), ex:
                           ^
SyntaxError: invalid syntax

The specs of my machine are:

• macbook air m1
• jupyterlabs
• anaconda

I think i pretty much narrowed the problem down to IbPy2's fault. Whenever i import backtrader with no IbPy2 installed it works fine. But soon as IbPy2 is installed using the above pip command i encounter this error.

Any help is appreciated and would make my week I have been stuck for days! Thank you in advance!

Answer 1

pip install wheel

Explanation:

• What is the error: It is a python2 syntax error because it runs on different version of python. Please read this answer for detail. Python 2 and Python 3.

• Why does it occur: Because there is no wheel installed, especially when you create a virtual environment with pipenv . Pipenv or pip installs IbPy2 without wheel and the message is like this: Using legacy 'setup.py install' for IbPy2, since package 'wheel' is not installed. And then it was recognized as the code written in Python2.

• How to solve: Install wheel first with pip install wheel . And then install IbPy2 with pip install IbPy2 , then it will be properly installed and recognized as Python3 code. So you will not see the Python2 syntax error anymore.