大约有 44,010 项符合查询结果（耗时：0.0473秒） [XML]
Pandas count(distinct) equivalent
...you want:
table.groupby('YEARMONTH').CLIENTCODE.nunique()
Example:
In [2]: table
Out[2]:
CLIENTCODE YEARMONTH
0 1 201301
1 1 201301
2 2 201301
3 1 201302
4 2 201302
5 2 201302
6 3 201302
In [3...
Convert numpy array to tuple
...
>>> arr = numpy.array(((2,2),(2,-2)))
>>> tuple(map(tuple, arr))
((2, 2), (2, -2))
share
|
improve this answer
|
...
What do the numbers in a version typically represent (i.e. v1.9.0.1)?
...
28 Answers
28
Active
...
Catching error codes in a shell pipe
...
20
If you really don't want the second command to proceed until the first is known to be successfu...
What is the difference between old style and new style classes in Python?
...
From New-style and classic classes:
Up to Python 2.1, old-style classes were the only flavour available to the user.
The concept of (old-style) class is unrelated to the concept of type:
if x is an instance of an old-style class, then x.__class__
designates the cla...
Difference between '..' (double-dot) and '…' (triple-dot) in range generation?
...
|
edited Dec 21 '16 at 0:33
answered Mar 13 '12 at 19:48
...
Mod in Java produces negative numbers [duplicate]
When I calculate int i = -1 % 2 I get -1 in Java. In Python, I get 1 as the result of -1 % 2 .
What do I have to do to get the same behavior in Java with the modulo function?
...
Display number with leading zeros
...
In Python 2 (and Python 3) you can do:
print "%02d" % (1,)
Basically % is like printf or sprintf (see docs).
For Python 3.+, the same behavior can also be achieved with format:
print("{:02d}".format(1))
For Python 3.6+ the s...
Version of SQLite used in Android?
...
482
UPDATE OCT 2016: Here is a link to the updated official docs which includes the main points in t...