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Strip HTML from strings in Python
...only show the contents of each HTML element and not the formatting itself. If it finds '<a href="whatever.com">some text</a>' , it will only print 'some text', '<b>hello</b>' prints 'hello', etc. How would one go about doing this?
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Multiple aggregations of the same column using pandas GroupBy.agg()
...put
column names, pandas accepts the special syntax in GroupBy.agg(),
known as “named aggregation”, where
The keywords are the output column names
The values are tuples whose first element is the column to select and the second element is the aggregation to apply to that column.
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关于php的socket初探 - PHP - 清泛IT论坛，有思想、有深度
...;global $errno, $errstr;
if ($port < 1024) {
die("Port must be a number which bigger than 1024/n");
}
&n...
python design patterns [closed]
... The third link is dead. Tried to find mirror but couldn't, If anybody has the correct link please add
– formatkaka
Oct 27 '16 at 12:40
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Extract substring in Bash
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If x is constant, the following parameter expansion performs substring extraction:
b=${a:12:5}
where 12 is the offset (zero-based) and 5 is the length
If the underscores around the digits are the only ones in the input, y...
Should a return statement be inside or outside a lock?
...ideal, but I wouldn't bend the code out of shape just to achieve it... And if the alternative is declaring a local variable (outside the lock), initializing it (inside the lock) and then returning it (outside the lock), then I'd say that a simple "return foo" inside the lock is a lot simpler.
To sh...
Why do x86-64 systems have only a 48 bit virtual address space?
...al answer is that AMD was just being cheap and hoped nobody would care for now, but I don't have references to cite.
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How to HTML encode/escape a string? Is there a built-in?
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Now that would be silly. I don't care much if it gets escaped or not. I'm just noting it's not required per the html specs.
– kch
Mar 28 '09 at 15:20
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What's the best way to send a signal to all members of a process group?
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You don't say if the tree you want to kill is a single process group. (This is often the case if the tree is the result of forking from a server start or a shell command line.) You can discover process groups using GNU ps as follows:
p...
Why return NotImplemented instead of raising NotImplementedError
...hould ask someone else to satisfy the operation. In the expression a == b, if a.__eq__(b) returns NotImplemented, then Python tries b.__eq__(a). If b knows enough to return True or False, then the expression can succeed. If it doesn't, then the runtime will fall back to the built-in behavior (which ...