大约有 40,000 项符合查询结果（耗时：0.0286秒） [XML]
Run an OLS regression with Pandas Data Frame
...df = pd.DataFrame({"A": [10,20,30,40,50], "B": [20, 30, 10, 40, 50], "C": [32, 234, 23, 23, 42523]})
>>> result = sm.ols(formula="A ~ B + C", data=df).fit()
>>> print(result.params)
Intercept 14.952480
B 0.401182
C 0.000352
dtype: float64
>>> pri...
Can scrapy be used to scrape dynamic content from websites that are using AJAX?
...and am dipping my hand into building a web-scraper. It's nothing fancy at all; its only purpose is to get the data off of a betting website and have this data put into Excel.
...
Get ID of last inserted document in a mongoDB w/ Java driver
...h MongoDB plainly auto-generates ObjectId's. However, your solution of manually creating an ObjectId does work, and thanks for this option!
– Apophenia Overload
Dec 4 '12 at 8:39
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Algorithm to detect overlapping periods [duplicate]
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I don't see how this covers all scenarios.
– doker
Sep 24 '14 at 10:55
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This type of CollectionView does not support changes to its SourceCollection from a thread different
...); but it is giving syntax error. Look like Send method is expecting some callback method name. I have tried various options like delegate with parameter but it is not allowing to have my custom parameter. I am very new to this kind of syntax, so it would really helpful if you can provide me synta...
private[this] vs private
...rotected over public doesn't apply.
Use private[this] where performance really matters (since you'll get direct field access instead of methods this way). Otherwise, just settle on one style so people don't need to figure out why this property is private and that one is private[this].
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PHP code to convert a MySQL query to CSV [closed]
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SELECT * INTO OUTFILE "c:/mydata.csv"
FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"'
LINES TERMINATED BY "\n"
FROM my_table;
(the documentation for this is here: http://dev.mysql.com/doc/refman/5.0/en/select.html)
or:
$select = "SELECT * FROM table_name";
$export = mysql_query ( $sel...
How to toggle a value in Python
...gt; print "%.2f usec/pass" % (1000000 * t4.timeit(number=100000)/100000)
6.32 usec/pass
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Total memory used by Python process?
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326
Here is a useful solution that works for various operating systems, including Linux, Windows 7...
Why switch is faster than if
...uct Packet
{
void(*execute)() = NULL;
};
Packet incoming_packet[255];
uint8_t test_value = 0;
void A()
{
std::cout << "I'm the 1st test.\n";
}
void B()
{
std::cout << "I'm the 2nd test.\n";
}
void Empty()
{
}
void Update()
{
if (incoming_packet[test_value].exe...