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Counting the Number of keywords in a dictionary in python
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429
len(yourdict.keys())
or just
len(yourdict)
If you like to count unique words in the file,...
mysql :: insert into table, data from another table?
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406
INSERT INTO action_2_members (campaign_id, mobile, vote, vote_date)
SELECT campaign_id, from...
Is a Python list guaranteed to have its elements stay in the order they are inserted in?
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492
Yes, the order of elements in a python list is persistent.
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Merging 2 branches together in GIT
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answered Aug 4 '10 at 9:58
knittlknittl
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How to avoid warning when introducing NAs by coercion
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4 Answers
4
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How do I get indices of N maximum values in a NumPy array?
... up with is:
In [1]: import numpy as np
In [2]: arr = np.array([1, 3, 2, 4, 5])
In [3]: arr.argsort()[-3:][::-1]
Out[3]: array([4, 3, 1])
This involves a complete sort of the array. I wonder if numpy provides a built-in way to do a partial sort; so far I haven't been able to find one.
If this ...
How to convert a table to a data frame
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324
I figured it out already:
as.data.frame.matrix(mytable)
does what I need -- apparently, the ...
Python: print a generator expression?
...;> (x*x for x in range(10))
<generator object <genexpr> at 0xb7485464>
This is sometimes called a generator comprehension, although I think the official name still is generator expression, there isn't really any difference, the parenthesis are only there to make the syntax valid. Yo...
Django REST framework: non-model serializer
... # Do some calculations here
# returns a tuple ((1,2,3, ), (4,5,6,))
result = ((1,2,3, ), (4,5,6,)) # final result
return result
The REST view:
from rest_framework.views import APIView
from rest_framework.response import Response
from rest_framework import status
f...