
Traceback (most recent call last):


 "/home/math/.pyenv/versions/3.8.1/lib/python3.8/runpy.py", line 193, in _run_module_as_main

return _run_code(code, main_globals, None,


 "/home/math/.pyenv/versions/3.8.1/lib/python3.8/runpy.py", line 86, in _run_code

exec(code, run_globals)


 "/home/math/.pyenv/versions/3.8.1/lib/python3.8/site-packages/pip/__main__.py", line 26, in <module>

sys.exit(_main())


 "/home/math/.pyenv/versions/3.8.1/lib/python3.8/site-packages/pip/_internal/cli/main.py", line 73, in main

command = create_command(cmd_name, isolated=("--isolated" in cmd_args))


 "/home/math/.pyenv/versions/3.8.1/lib/python3.8/site-packages/pip/_internal/commands/__init__.py", line 104, in create_command

module = importlib.import_module(module_path)


 "/home/math/.pyenv/versions/3.8.1/lib/python3.8/importlib/__init__.py", line 127, in import_module

return _bootstrap._gcd_import(name[level:], package, level)


 "<frozen importlib._bootstrap>", line 1014, in _gcd_import


 "<frozen importlib._bootstrap>", line 991, in _find_and_load


 "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked


 "<frozen importlib._bootstrap>", line 671, in _load_unlocked


 "<frozen importlib._bootstrap_external>", line 783, in exec_module


 "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed


 "/home/math/.pyenv/versions/3.8.1/lib/python3.8/site-packages/pip/_internal/commands/install.py", line 24, in <module>

from pip._internal.cli.req_command import RequirementCommand, with_cleanup


 "/home/math/.pyenv/versions/3.8.1/lib/python3.8/site-packages/pip/_internal/cli/req_command.py", line 16, in <module>

from pip._internal.index.package_finder import PackageFinder


 "/home/math/.pyenv/versions/3.8.1/lib/python3.8/site-packages/pip/_internal/index/package_finder.py", line 21, in <module>

from pip._internal.index.collector import parse_links


 "/home/math/.pyenv/versions/3.8.1/lib/python3.8/site-packages/pip/_internal/index/collector.py", line 14, in <module>

from pip._vendor import html5lib, requests


 "/home/math/.pyenv/versions/3.8.1/lib/python3.8/site-packages/pip/_vendor/requests/__init__.py", line 114, in <module>

from . import utils


 "/home/math/.pyenv/versions/3.8.1/lib/python3.8/site-packages/pip/_vendor/requests/utils.py", line 25, in <module>

from . import certs


 "/home/math/.pyenv/versions/3.8.1/lib/python3.8/site-packages/pip/_vendor/requests/certs.py", line 15, in <module>

from pip._vendor.certifi import where


 "/home/math/.pyenv/versions/3.8.1/lib/python3.8/site-packages/pip/_vendor/certifi/__init__.py", line 1, in <module>

from .core import contents, where


 "/home/math/.pyenv/versions/3.8.1/lib/python3.8/site-packages/pip/_vendor/certifi/core.py", line 12, in <module>

from importlib.resources import read_text


 "/home/math/.pyenv/versions/3.8.1/lib/python3.8/importlib/resources.py", line 11, in <module>

from typing import Iterable, Iterator, Optional, Set, Union
# noqa: F401


 "/home/math/.pyenv/versions/3.8.1/lib/python3.8/site-packages/typing.py", line 1357, in <module>

class Callable(extra=collections_abc.Callable, metaclass=CallableMeta):


 "/home/math/.pyenv/versions/3.8.1/lib/python3.8/site-packages/typing.py", line 1005, in __new__

self._abc_registry = extra._abc_registry

AttributeError: type object 'Callable' has no attribute '_abc_registry'

Traceback (most recent call last):


 "<stdin>", line 1, in <module>


 "C:\Users\MICHAEL\Anaconda3\envs\env_zipline\lib\site-packages\zipline\__init__.py", line 24, in <module>

from . import finance


 "C:\Users\MICHAEL\Anaconda3\envs\env_zipline\lib\site-packages\zipline\finance\__init__.py", line 16, in <module>

from . import execution, trading


 "C:\Users\MICHAEL\Anaconda3\envs\env_zipline\lib\site-packages\zipline\finance\trading.py", line 20, in <module>

from sqlalchemy import create_engine


 "C:\Users\MICHAEL\Anaconda3\envs\env_zipline\lib\site-packages\sqlalchemy\__init__.py", line 9, in <module>

from .sql import (


 "C:\Users\MICHAEL\Anaconda3\envs\env_zipline\lib\site-packages\sqlalchemy\sql\__init__.py", line 101, in <module>

__go(locals())


 "C:\Users\MICHAEL\Anaconda3\envs\env_zipline\lib\site-packages\sqlalchemy\sql\__init__.py", line 99, in __go

from . import naming


 "C:\Users\MICHAEL\Anaconda3\envs\env_zipline\lib\site-packages\sqlalchemy\sql\naming.py", line 15, in <module>

from .. import event, events


 "C:\Users\MICHAEL\Anaconda3\envs\env_zipline\lib\site-packages\sqlalchemy\events.py", line 11, in <module>

from .pool import Pool


 "C:\Users\MICHAEL\Anaconda3\envs\env_zipline\lib\site-packages\sqlalchemy\pool\__init__.py", line 20, in <module>

from .base import _ConnectionFairy
# noqa


 "C:\Users\MICHAEL\Anaconda3\envs\env_zipline\lib\site-packages\sqlalchemy\pool\base.py", line 57, in <module>

class Pool(log.Identified):


 "C:\Users\MICHAEL\Anaconda3\envs\env_zipline\lib\site-packages\sqlalchemy\pool\base.py", line 63, in Pool

@util.deprecated_params(
AttributeError: module 'sqlalchemy.util' has no attribute 'deprecated_params'
