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How to get the first column of a pandas DataFrame as a Series?
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143
>>> import pandas as pd
>>> df = pd.DataFrame({'x' : [1, 2, 3, 4], 'y' : [4, 5...
How to include a quote in a raw Python string
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edited Aug 15 '14 at 4:03
answered Jan 7 '11 at 21:31
Ada...
dd: How to calculate optimal blocksize? [closed]
...d time that. (Remember to clear kernel buffer caches before each run: echo 3 > /proc/sys/vm/drop_caches).
However, as a rule of thumb, I've found that a large enough block size lets dd do a good job, and the differences between, say, 64 KiB and 1 MiB are minor, compared to 4 KiB versus 64 KiB. (...
Get class that defined method
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Aaron Hall♦
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answered Jun 7 '09 at 2:23
Alex MartelliAlex Martelli
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LEGO EV3 机器人按键控制 · App Inventor 2 中文网
... 搜索 LEGO EV3 机器人按键控制
LEGO EV3 机器人按键控制
项目概述
下载
示例项目文件：
机器人组装说明 ...
Android应用开发性能优化完全分析 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...在这种环境下运行你的App你就会发现很多性能问题。
2-3 应用UI卡顿分析解决方法
分析UI卡顿我们一般都借助工具，通过工具一般都可以直观的分析出问题原因，从而反推寻求优化方案，具体如下细说各种强大的工具。
2-3-1 使...
How to implement a binary tree?
... print(str(node.v) + ' ')
self._printTree(node.r)
# 3
# 0 4
# 2 8
tree = Tree()
tree.add(3)
tree.add(4)
tree.add(0)
tree.add(8)
tree.add(2)
tree.printTree()
print(tree.find(3).v)
print(tree.find(10))
tree.deleteTree()
tree.printTree()
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pip install from git repo branch
...p install git+https://github.com/tangentlabs/django-oscar-paypal.git@issue/34/oscar-0.6
And specify the branch name without the leading /.
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Arduino 101 实验02 - 手机开关灯与亮度调节 · App Inventor 2 中文网
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二、接线
三、准备 App Inventor 端
3.1 导入两个扩展
3.2 界面组件
四、分步搭代码块
第 1 步：连上板子
第 2 步：开灯关灯
第 3 步：滑动条调亮度
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