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Is it possible to specify your own distance function using scikit-learn K-Means Clustering?
... X or Y may be sparse -- best csr
"""
# todense row at a time, v slow if both v sparse
sxy = 2*issparse(X) + issparse(Y)
if sxy == 0:
return cdist( X, Y, **kwargs )
d = np.empty( (X.shape[0], Y.shape[0]), np.float64 )
if sxy == 2:
for j, x in enumera...
Extracting just Month and Year separately from Pandas Datetime column
...ns showing year and month separately you can do this:
df['year'] = pd.DatetimeIndex(df['ArrivalDate']).year
df['month'] = pd.DatetimeIndex(df['ArrivalDate']).month
or...
df['year'] = df['ArrivalDate'].dt.year
df['month'] = df['ArrivalDate'].dt.month
Then you can combine them or work with them ...
Reading string from input with space character? [duplicate]
...
NOTE: When using fgets(), the last character in the array will be '\n' at times when you use fgets() for small inputs in CLI (command line interpreter) , as you end the string with 'Enter'. So when you print the string the compiler will always go to the next line when printing the string. If you wa...
Best way to convert list to comma separated string in java [duplicate]
...
@Kay I do very much. An algorithm whose run time increases logarithmically as a function of the number of objects it operates on. Why did I miscalculate somehow? Did I misread your code? in it you go through the same string 2 times, the first to count the total the s...
Python debugging tips [closed]
...ograms that need to respond before the other end of the network connection times out and goes away. You might not have much time to single-step a debugger; but you can just let your code run, and log everything, then pore over the logs and figure out what's really happening.
EDIT: The original URL...
String formatting named parameters?
...evaluated twice. Twice isn't so bad, but it could just have easily been 20 times :)
– mpen
Mar 16 '10 at 3:31
...
Test if a command outputs an empty string
... be a problem but for larger outputs the difference may be significant:
$ time [ -z "$(seq 1 10000000)" ]
real 0m2.703s
user 0m2.485s
sys 0m0.347s
Compare it with:
$ time [ $(seq 1 10000000 | wc -c) -eq 0 ]
real 0m0.128s
user 0m0.081s
sys 0m0.105s
And even better:
$ time [ $(seq...
Difference between __str__ and __repr__?
...ggers is their basic nature — most failures I debug happened a long long time ago, in a galaxy far far away. This means that I do believe, with religious fervor, in logging. Logging is the lifeblood of any decent fire-and-forget server system. Python makes it easy to log: with maybe some project s...
Finding most changed files in Git
... Nice. Also, I found it also reports file that were deleted long time ago. Quick fix was to limit time, e.g: --since="last year"
– FractalSpace
Apr 5 '13 at 21:04
2...
Throwing cats out of windows
... cat's body design and cat's turning skills. But that still means it needs time to turn. The more time there is (==>the higher the altitude), the more likely the cat will land on its feet (==> chances of survival increase dramatically, as opposed to e.g. landing on the head). But you're right,...