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what is the most efficient way of counting occurrences in pandas?
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I think df['word'].value_counts() should serve. By skipping the groupby machinery, you'll save some time. I'm not sure why count should be much slower than max. Both take some time to avoid missing values. (Compare with size.)
In any case, value_counts has been specifical...
Validate a username and password against Active Directory?
...t a non-existant user. As a result, you may want to call UserPrinciple.FindByIdentity to see if the passed in user ID exists first.
– Chris J
Sep 8 '11 at 15:17
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Which is faster: multiple single INSERTs or one multiple-row INSERT?
...-optimization.html
The time required for inserting a row is determined by the following factors, where the numbers indicate approximate proportions:
Connecting: (3)
Sending query to server: (2)
Parsing query: (2)
Inserting row: (1 × size of row)
Inserting indexes: (1 × number o...
ORA-12514 TNS:listener does not currently know of service requested in connect descriptor
...oracle_user\product\12.1.0\dbhome_1\network\admin\listener.ora
# Generated by Oracle configuration tools.
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = CLRExtProc)
(ORACLE_HOME = C:\app\oracle_user\product\12.1.0\dbhome_1)
(PROGRAM = extproc)
(ENVS = "EXTPROC...
AngularJS: disabling all form controls between submit and server response
...n't want to use JQuery (which is evil!!!) and query all elements as array (by class or attribute marker)
The ideas I had so far are:
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Escaping regex string
...c example, search any occurence of the provided string optionally followed by 's', and return the match object.
def simplistic_plural(word, text):
word_or_plural = re.escape(word) + 's?'
return re.match(word_or_plural, text)
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How to properly ignore exceptions
... otherwise you will have nightmares when hunting down trivial bugs, hidden by your generic "except"s. See dbr's answer for more info. (I know this was not the original question - but anyone looking for this will just take your snippet and use it as is)
– johndodo
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Is there a difference between “raise exception()” and “raise exception” without parenthesis?
...ion. If it is a class, the exception instance will be obtained when needed by instantiating the class with no arguments."
That said, even though the semantics are the same, the first form is microscopically faster, and the second form is more flexible (because you can pass it arguments if needed)....
Convert one date format into another in PHP
...date('Y-m-d H:i:s', '1234567890');
DateTime() works with Unix timestamps by adding an @ before the timestamp:
$date = new DateTime('@1234567890');
$new_date_format = $date->format('Y-m-d H:i:s');
If the timestamp you have is in milliseconds (it may end in 000 and/or the timestamp is thirteen...
Renaming or copying files and folder using NERDTree on Vim. Is it possible?
...my life! Is there a way to disable the confirm question when delete a file by using 'm + d', It really tedious to confirm, and it need to confirm twice. I just want it no prompt at all. Do you know how to do it?
– mko
Apr 12 '13 at 1:28
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