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Pandas aggregate count distinct
...2M
%time _=g.agg({"id": lambda x: x.nunique()})
CPU times: user 3min 3s, sys: 2.94 s, total: 3min 6s
Wall time: 3min 20s
%time _=g.agg({"id": pd.Series.nunique})
CPU times: user 3min 2s, sys: 2.44 s, total: 3min 4s
Wall time: 3min 18s
%time _=g.agg({"id": "nunique"})
CPU times: user 14 s, sys: 4...
How to configure Git post commit hook
...re is the code of my working post-receive hook:
#!/usr/bin/python
import sys
from subprocess import call
if __name__ == '__main__':
for line in sys.stdin.xreadlines():
old, new, ref = line.strip().split(' ')
if ref == 'refs/heads/master':
print "===================...
How to join components of a path when you are constructing a URL in Python
...n the current os. posixpath is the underlying module that is used on posix systems under the namespace os.path:
>>> os.path.join is posixpath.join
True
>>> posixpath.join('/media/', 'js/foo.js')
'/media/js/foo.js'
So you can just import and use posixpath.join instead for urls, w...
How to pass a URI to an intent?
...string
intent.putExtra("imageUri", imageUri.toString());
and then just convert the string back to uri like this
Uri myUri = Uri.parse(extras.getString("imageUri"));
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How do I get the path of the current executed file in Python?
...odules are built-in to the interpreter, e.g., by py2exe
return hasattr(sys, "frozen")
def module_path():
encoding = sys.getfilesystemencoding()
if we_are_frozen():
return os.path.dirname(unicode(sys.executable, encoding))
return os.path.dirname(unicode(__file__, encoding))
...
What breaking changes are introduced in C++11?
...can be one of
A sequence of chars has been accumulated in stage 2 that is converted (according to the rules of scanf) to a value of the type of val. This value is stored in val and ios_base::goodbit is stored in err.
The sequence of chars accumulated in stage 2 would have caused scanf to report an ...
Store boolean value in SQLite
...ad, Boolean values are stored as integers 0 (false) and 1 (true).
You can convert boolean to int in this way:
int flag = (boolValue)? 1 : 0;
You can convert int back to boolean as follows:
// Select COLUMN_NAME values from db.
// This will be integer value, you can convert this int value ba...
What is the best way to exit a function (which has no return value) in python before the function en
...
@TomSawyer to stop a Python program early, do import sys first and then sys.exit() if you want to exit but report success or sys.exit("some error message to print to stderr").
– Boris
Mar 4 at 17:07
...
Least common multiple for 3 or more numbers
...like that:
>>> f = lambda a,b: "f(%s,%s)" % (a,b)
>>> print reduce(f, "abcd")
f(f(f(a,b),c),d)
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Load dimension value from res/values/dimension.xml from source code
...ics associated with the resources." when all they want to say is that they convert to pixels.
– Trilarion
Dec 12 '15 at 22:31
...