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Import error: No module name urllib2
...on:
The urllib2 module has been split across several modules in Python 3 named urllib.request and urllib.error. The 2to3 tool will automatically adapt imports when converting your sources to Python 3.
So you should instead be saying
from urllib.request import urlopen
html = urlopen("http://ww...
Using Python String Formatting with Lists
...
edited Sep 27 '11 at 12:03
answered Sep 27 '11 at 11:53
in...
Find the max of two or more columns with pandas
...>>> import pandas as pd
>>> df = pd.DataFrame({"A": [1,2,3], "B": [-2, 8, 1]})
>>> df
A B
0 1 -2
1 2 8
2 3 1
>>> df[["A", "B"]]
A B
0 1 -2
1 2 8
2 3 1
>>> df[["A", "B"]].max(axis=1)
0 1
1 8
2 3
and so:
>>> df["C"] = ...
廉价共享存储解决方案1-drbd+ha+nfs - 更多技术 - 清泛网 - 专注C/C++及内核技术
...得无所适从而产生冲突。
另一种情况假如 tomact2,tomcat3同步tomcat1的目录，当tomcat1挂了之后，负载均衡会把访问分配到tomcat2和3，这个时候tomcat2和3彼此独立。客户分别对这两台机器进行读写于是数据又不同步了。
1.2 分布式...
do N times (declarative syntax)
..., without any library, just native vanilla.
To basically call something() 3 times, use:
[1,2,3].forEach(function(i) {
something();
});
considering the following function:
function something(){ console.log('something') }
The outpout will be
something
something
something
To complete thi...
How to profile a bash shell script slow startup?
My bash shell takes up to 3-4 seconds to start up, while if I start it with --norc it runs immediately.
7 Answers
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Can I get JSON to load into an OrderedDict?
...
Bruno Bronosky
49.3k99 gold badges122122 silver badges111111 bronze badges
answered Aug 3 '11 at 4:48
SingleNegationEli...
How do I check if a string is unicode or ascii?
...
301
In Python 3, all strings are sequences of Unicode characters. There is a bytes type that holds...
Compare two data.frames to find the rows in data.frame 1 that are not present in data.frame 2
...
13 Answers
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