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What does preceding a string literal with “r” mean? [duplicate]
...r else an error SyntaxError: EOL while scanning string literal occurs. For Python3 it is print (r"Test\new")
– Arthur
May 23 '17 at 3:07
...
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...
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 ...
Getting only 1 decimal place [duplicate]
...ing to represent it with only one digit:
print("{:.1f}".format(number)) # Python3
print "%.1f" % number # Python2
or actually round off the other decimal places?
round(number,1)
or even round strictly down?
math.floor(number*10)/10
...
How to do integer division in javascript (Getting division answer in int not float)? [duplicate]
...
However this emulates the behavior of python3: math.inf // 7 == nan => parseInt(Infinity / 7) == NaN
– jneuendorf
Jan 25 at 2:22
add a ...
Get the first element of each tuple in a list in Python [duplicate]
...nsion you give will only work when the tuples have exactly two entries. In python3, you could do [x for x, *the_rest in rows], where the * really is the special syntax for "the rest of the elements of the tuple". For a list comprehension that will work in python2, use [iter(x).next() for x in rows]
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How can I create a copy of an object in Python?
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Shallow copy with copy.copy()
#!/usr/bin/env python3
import copy
class C():
def __init__(self):
self.x = [1]
self.y = [2]
# It copies.
c = C()
d = copy.copy(c)
d.x = [3]
assert c.x == [1]
assert d.x == [3]
# It's shallow.
c = C()
d = copy.copy(c)...
Add a new item to a dictionary in Python [duplicate]
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@Pakman's comment doesn't work in Python3 (see: stackoverflow.com/questions/13361510/…)
– Prof
Feb 21 '16 at 21:15
...
How to unzip a list of tuples into individual lists? [duplicate]
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In Python3, this creates a zip object. >>> l = [(1,2), (3,4), (8,9)] >>> zip(*l) <zip at 0x1042d8c48> which can be viewed with a list comprehension >>> [ii for ii in zip(*l)] [(1, 3, 8), (2...
Compile (but do not run) a Python script [duplicate]
... how to run it on your src/ dir: find src -type f -name '*.py' | xargs -n1 python3 -m py_compile
– stealthybox
Aug 16 '18 at 20:58
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