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How to sum all the values in a dictionary?
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phihag's answer (and similar ones) won't work in python3.
For python 3:
d = {'key1': 1,'key2': 14,'key3': 47}
sum(list(d.values()))
Update!
There are complains that it doesn't work! I just attach a screenshot from my terminal. Could be some mismatch in versions etc.
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Why aren't python nested functions called closures?
... make x = [0] in the outer scope, and use x[0] += 1 in the inner scope. In Python3, you could keep your code as it is and use the nonlocal keyword.
– unutbu
May 9 '14 at 10:26
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搭建高可用mongodb集群（四）—— 分片 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...p /data/mongodbtest
#进入mongodb文件夹
cd /data/mongodbtest
3、下载mongodb的安装程序包
wget http://fastdl.mongodb.org/linux/mongodb-linux-x86_64-2.4.8.tgz
#解压下载的压缩包
tar xvzf mongodb-linux-x86_64-2.4.8.tgz
4、分别在每台机器建立mongos 、config ...
不同品牌的防火墙组成高可靠性集群 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...由软件。最新版本的 Zebra 以及文档可以从 GNU Zebra 网站上下载：http://www.zebra.org/ Zebra ;的设计独特，采用模块的方法来管理协议。可以根据网络需要启用或者禁用协议。
Zebra 最为实用的一点是它的配置形式同 Cisco IOS 极其类似...
How to update Python?
...s to point to dominant (e.g. 2.7), shortcut to other (e.g. in BASH $ ln /c/Python33/python.exe python3).
The answer depends:
If OP has 2.7.x and wants to install newer version of 2.7.x, then
if using MSI installer from the official Python website, just install over old version, installer will ...
How do you extract a column from a multi-dimensional array?
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I can't find any documentation for arange() in Python3 outside of numpy. Anyone?
– Kevin W Matthews
Aug 17 '19 at 21:45
add a comment
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Loop backwards using indices in Python?
...are multiple ways.
Better Way
For pythonic way, check PEP 0322.
This is Python3 pythonic example to print from 100 to 0 (including 100 & 0).
for i in reversed(range(101)):
print(i)
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Why doesn't print work in a lambda?
... a SyntaxError, python doesn't let you assign a value to print in 2.xx; in python3 you could say
lambda: print('hi')
and it would work because they've changed print to be a function instead of a statement.
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numpy matrix vector multiplication [duplicate]
...r Solutions
Also know there are other options:
As noted below, if using python3.5+ the @ operator works as you'd expect:
>>> print(a @ b)
array([16, 6, 8])
If you want overkill, you can use numpy.einsum. The documentation will give you a flavor for how it works, but honestly, I didn't...
【解决】Python：ModuleNotFoundError: No module named \'google.protobuf...
...入dist-packages目录，刷新__init__.py文件：
cd /usr/local/lib/python3/dist-packages
touch google/__init__.py
参考资料：https://stackoverflow.com/questions/38680593/importerror-no-module-named-google-protobuf
python,protobuf