为什么在导入 MetPy 子模块时会出现此错误？

Question

我刚刚第一次使用

安装了 MetPy

conda install -c conda-forge metpy

低于 Mac OS X 10.14（莫哈韦沙漠）。我好像得到了 metpy-0.11.1

接下来的行会生成在底部复制的错误诊断。

from metpy.plots import StationPlot

如果我改为尝试

，我会得到完全相同的错误 (TypeError: find_intersections takes 5 parameters, but 3 units were passed)

import metpy.calc as mpcalc

如果我使用

导入整个模块，我不会收到错误消息

import metpy

我以前从未遇到过任何已建立的 Python 包的导入错误，所以任何调试我的设置的帮助都将不胜感激。

TypeError Traceback (most recent call last) in ----> 1 from metpy.plots import StationPlot 2

~/miniconda3/envs/scipy/lib/python3.6/site-packages/metpy/plots/init.py in 11 from .ctables import * # noqa: F403 12 from .declarative import * # noqa: F403 ---> 13 from .skewt import * # noqa: F403 14 from .station_plot import * # noqa: F403 15 from .wx_symbols import * # noqa: F403

~/miniconda3/envs/scipy/lib/python3.6/site-packages/metpy/plots/skewt.py in 27 28 from ._util import colored_line ---> 29 from ..calc import dewpoint, dry_lapse, moist_lapse, vapor_pressure 30 from ..calc.tools import _delete_masked_points 31 from ..deprecation import metpyDeprecation

~/miniconda3/envs/scipy/lib/python3.6/site-packages/metpy/calc/init.py in 5 6 from .basic import * # noqa: F403 ----> 7 from .cross_sections import * # noqa: F403 8 from .indices import * # noqa: F403 9 from .kinematics import * # noqa: F403

~/miniconda3/envs/scipy/lib/python3.6/site-packages/metpy/calc/cross_sections.py in 12 13 from .basic import coriolis_parameter ---> 14 from .tools import first_derivative 15 from ..package_tools import Exporter 16 from ..xarray import check_axis, check_matching_coordinates

~/miniconda3/envs/scipy/lib/python3.6/site-packages/metpy/calc/tools.py in 104 @preprocess_xarray 105 @units.wraps(('=A', '=B'), ('=A', '=B', '=B')) --> 106 def find_intersections(x, a, b, direction='all', log_x=False): 107 """Calculate the best estimate of intersection. 108

~/miniconda3/envs/scipy/lib/python3.6/site-packages/pint/registry_helpers.py in decorator(func) 246 raise TypeError( 247 "%s takes %i parameters, but %i units were passed" --> 248 % (func.name, count_params, len(args)) 249 ) 250

TypeError: find_intersections takes 5 parameters, but 3 units were passed

Answer 1

我的猜测是您为旧版本的 MetPy 安装了太新的 Pint 版本 (>= 0.10)。我至少会用 conda install -c conda-forge metpy=0.12.2 更新 metpy。您可以尝试使用 conda update -c conda-forge --all.

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为什么在导入 MetPy 子模块时会出现此错误？

Why do I get this error when importing MetPy submodules?

metpy