64 lines
1.0 KiB
Markdown
64 lines
1.0 KiB
Markdown
---
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id: 5e9a093a74c4063ca6f7c154
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title: Numpy 数组
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challengeType: 11
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videoId: VDYVFHBL1AM
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bilibiliIds:
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aid: 890607366
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bvid: BV1zP4y1h7FR
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cid: 409011400
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dashedName: numpy-arrays
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---
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# --description--
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*在视频中我们使用的编辑器工具是在 notebook.ai 这个平台，你也可以选择用其他的平台，比如说 Google Colab 也是一个不错的选择。*
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以下有更多的资料：
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- [在 GitHub 平台的 Notebooks](https://github.com/ine-rmotr-curriculum/freecodecamp-intro-to-numpy)
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- [如何使用 Google Colab 来打开 GitHub 上的 Notebooks](https://colab.research.google.com/github/googlecolab/colabtools/blob/master/notebooks/colab-github-demo.ipynb)
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# --question--
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## --text--
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以下代码会打印出什么？
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```py
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A = np.array([
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['a', 'b', 'c'],
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['d', 'e', 'f'],
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['g', 'h', 'i']
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])
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print(A[:, :2])
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```
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## --answers--
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```py
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[['a' 'b']]
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```
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---
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```py
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[['b' 'c']
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['e' 'f']
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['h' 'i']]
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```
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---
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```py
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[['a' 'b']
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['d' 'e']
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['g' 'h']]
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```
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## --video-solution--
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3
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