问题

I am your Chinese translator, and here is the translated content you requested:

我正在尝试使用自己的数据重现[此教程][1]。我有一个简单的多边形方格：

```python
from shapely import wkt
import pandas as pd
import geopandas as gpd

data_list = [
    [0, 51, wkt.loads("POLYGON ((-74816.7238 5017078.8988, -74716.7238 5017078.8988, -74716.7238 5016978.8988, -74816.7238 5016978.8988, -74816.7238 5017078.8988))")],
    [1, 91, wkt.loads("POLYGON ((-74816.7238 5016978.8988, -74716.7238 5016978.8988, -74716.7238 5016878.8988, -74816.7238 5016878.8988, -74816.7238 5016978.8988))")],
    [2, 88, wkt.loads("POLYGON ((-74816.7238 5016878.8988, -74716.7238 5016878.8988, -74716.7238 5016778.8988, -74816.7238 5016778.8988, -74816.7238 5016878.8988))")],
    [3, 54, wkt.loads("POLYGON ((-74816.7238 5016778.8988, -74716.7238 5016778.8988, -74716.7238 5016678.8988, -74816.7238 5016678.8988, -74816.7238 5016778.8988))")],
    [4, 51, wkt.loads("POLYGON ((-74816.7238 5016678.8988, -74716.7238 5016678.8988, -74716.7238 5016578.8988, -74816.7238 5016578.8988, -74816.7238 5016678.8988))")],
]

df = pd.DataFrame(data_list, columns=["id", "data", "geometry"])
gdf = gpd.GeoDataFrame(df, geometry="geometry", crs=32633)

我将GeoPandas GeoDataFrame转换为SpatialPandas Geodataframe：

from spatialpandas import GeoDataFrame

sp_gdf = GeoDataFrame(gdf)

此时，我尝试根据此示例创建一个等值线地图：

import datashader as ds

canvas = ds.Canvas(plot_width=1000, plot_height=1000)
agg = canvas.polygons(sp_gdf, 'geometry', agg=ds.mean('data'))

但我遇到了以下错误：

AttributeError: module 'numpy' has no attribute 'warnings'

我使用的是Ubuntu 22.04，Python 3.10，并且以上代码在Jupyter Notebook中运行。以下是使用的库的版本：

• shapely: 2.0.1
• pandas: 2.0.1
• geopandas: 0.12.2
• spatialpandas: 0.4.7
• datashader: 0.14.4
• numpy: 1.24.3

此外，Python环境由Poetry 1.4.2管理。

注意：此 线程完全无用。

<details>
<summary>英文:</summary>

I&#39;m trying to reproduce [this][1] tutorial with my own data. I&#39;ve a simple square grid of polygons:

from shapely import wkt
import pandas as pd
import geopandas as gpd

data_list = [
[0,51, wkt.loads("POLYGON ((-74816.7238 5017078.8988, -74716.7238 5017078.8988, -74716.7238 5016978.8988, -74816.7238 5016978.8988, -74816.7238 5017078.8988))")],
[1,91, wkt.loads("POLYGON ((-74816.7238 5016978.8988, -74716.7238 5016978.8988, -74716.7238 5016878.8988, -74816.7238 5016878.8988, -74816.7238 5016978.8988))")],
[2,88, wkt.loads("POLYGON ((-74816.7238 5016878.8988, -74716.7238 5016878.8988, -74716.7238 5016778.8988, -74816.7238 5016778.8988, -74816.7238 5016878.8988))")],
[3,54, wkt.loads("POLYGON ((-74816.7238 5016778.8988, -74716.7238 5016778.8988, -74716.7238 5016678.8988, -74816.7238 5016678.8988, -74816.7238 5016778.8988))")],
[4,51, wkt.loads("POLYGON ((-74816.7238 5016678.8988, -74716.7238 5016678.8988, -74716.7238 5016578.8988, -74816.7238 5016578.8988, -74816.7238 5016678.8988))")],
]

df = pd.DataFrame(data_list, columns=["id", "data", "geometry"])
gdf = gpd.GeoDataFrame(df, geometry="geometry", crs=32633)

I've translate GeoPandas GeoDataFrame to SpatialPandas Geodataframe:

from spatialpandas import GeoDataFrame

sp_gdf = GeoDataFrame(gdf)

At this point I try to create a choropleth map according to [this][2] example:

import datashader as ds

canvas = ds.Canvas(plot_width=1000, plot_height=1000)
agg = canvas.polygons(sp_gdf, 'geometry', agg=ds.mean('data'))

But I'm facing in the error below:

AttributeError Traceback (most recent call last)
Cell In[7], line 4
1 import datashader as ds
3 canvas = ds.Canvas(plot_width=1000, plot_height=1000)
----> 4 agg = canvas.polygons(sp_gdf, 'geometry', agg=ds.mean('data'))
6 agg

File ~/.cache/pypoetry/virtualenvs/drakonotebook-larABRfp-py3.10/lib/python3.10/site-packages/datashader/core.py:753, in Canvas.polygons(self, source, geometry, agg)
751 agg = any_rdn()
752 glyph = PolygonGeom(geometry)
--> 753 return bypixel(source, self, glyph, agg)

File ~/.cache/pypoetry/virtualenvs/drakonotebook-larABRfp-py3.10/lib/python3.10/site-packages/datashader/core.py:1258, in bypixel(source, canvas, glyph, agg, antialias)
1255 canvas.validate()
1257 # All-NaN objects (e.g. chunks of arrays with no data) are valid in Datashader
-> 1258 with np.warnings.catch_warnings():
1259 np.warnings.filterwarnings('ignore', r'All-NaN (slice|axis) encountered')
1260 return bypixel.pipeline(source, schema, canvas, glyph, agg, antialias=antialias)

File ~/.cache/pypoetry/virtualenvs/drakonotebook-larABRfp-py3.10/lib/python3.10/site-packages/numpy/init.py:320, in getattr(attr)
317 from .testing import Tester
318 return Tester
--> 320 raise AttributeError("module {!r} has no attribute "
321 "{!r}".format(name, attr))

AttributeError: module 'numpy' has no attribute 'warnings'

I'm on Ubuntu 22.04, with Python 3.10 and the code above runs in a Jupyter Notebook. Below the version of libraries in use:

- shapely: 2.0.1
- pandas: 2.0.1
- geopandas: 0.12.2
- spatialpandas: 0.4.7
- datashader: 0.14.4
- numpy: 1.24.3 

Moreover the python environment is managed by Poetry 1.4.2

NB: [this][3] thread is complete unuseful.


  [1]: https://datashader.org/user_guide/Polygons.html#geopandas-import
  [2]: https://datashader.org/user_guide/Polygons.html#plotting-as-filled-polygons
  [3]: https://stackoverflow.com/questions/74863592/attributeerror-module-numpy-has-no-attribute-warnings

</details>


# 答案1
**得分**: 2

`numpy.warnings` 只是对内置的 Python `warnings` 模块的引用，如我在我的 NumPy 版本中看到的：

```python
import numpy as np
np.__version__  # '1.21.5'
np.warnings

所以，你的问题可能的一个 解决方法 是在运行时手动将该引用添加到你的脚本中：

import numpy as np
import warnings
np.warnings = warnings

# 在此处添加你的脚本

然而，正如用户 @WarrenWeckesser 指出的线程中所描述的，你可能需要更新 datashader 包的版本，以便该包不再尝试访问 np.warnings 引用，因为这个引用已经从 NumPy 中被移除了。

>>> import numpy as np
>>> np.__version__
'1.21.5'
>>> np.warnings
<module 'warnings' from 'D:\\Anaconda3\\lib\\warnings.py'>

import numpy as np
import warnings
np.warnings = warnings

<YOUR SCRIPT HERE>