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“Inner exception” (with traceback) in Python?
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138
Python 2
It's simple; pass the traceback as the third argument to raise.
import sys
class MyE...
Pandas conditional creation of a series/dataframe column
...s
Set Type color
0 Z A green
1 Z B green
2 X B red
3 Y C red
If you have more than two conditions then use np.select. For example, if you want color to be
yellow when (df['Set'] == 'Z') & (df['Type'] == 'A')
otherwise blue when (df['Set'] == 'Z') & (df[...
Scala: what is the best way to append an element to an Array?
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3 Answers
3
Active
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Why exactly is eval evil?
...tors:
(let ((ops '(+ *)))
(dolist (op ops)
(print (eval (list op 1 2 3)))))
That's better written as:
(let ((ops '(+ *)))
(dolist (op ops)
(print (funcall op 1 2 3))))
There are lots of examples where beginners learning Lisp think they need EVAL, but they don't need it - since expressi...
Algorithm to calculate the number of divisors of a given number
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edited Jun 13 '12 at 11:16
oers
17.1k1111 gold badges6363 silver badges7373 bronze badges
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src/lxml/etree_defs.h:9:31: fatal error: libxml/xmlversion.h: No such file or directory
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edited Aug 6 '13 at 6:10
answered Apr 2 '13 at 9:48
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What is an alternative to execfile in Python 3?
It seems they canceled in Python 3 all the easy way to quickly load a script by removing execfile()
12 Answers
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How to dump a table to console?
...e from Penlight:
> t = { a = { b = { c = "Hello world!", 1 }, 2, d = { 3 } } }
> require 'pl.pretty'.dump(t)
{
a = {
d = {
3
},
b = {
c = "Hello world!",
1
},
2
}
}
share
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C++ stl stack/queue 的使用方法 - C/C++ - 清泛网 - 专注C/C++及内核技术
... cout<<"dui lie bu kong\n";
system("PAUSE");
return 0;
}
3、priority_queue
在<queue>头文件中，还定义了另一个非常有用的模板类priority_queue(优先队列）。优先队列与队列的差别在于优先队列不是按照入队的顺序出队，而是按照队列...
How to loop through all but the last item of a list?
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324
for x in y[:-1]
If y is a generator, then the above will not work.
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