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How to read an external local JSON file in JavaScript?
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If you have python installed you can use command line python -m SimpleHTTPServer 8888 and open http://localhost:8888/ in your browser (Windows or Mac). 8888 is the port and can be changed.
– geotheory
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Efficient evaluation of a function at every cell of a NumPy array
...believe I have found a better solution. The idea to change the function to python universal function (see documentation), which can exercise parallel computation under the hood.
One can write his own customised ufunc in C, which surely is more efficient, or by invoking np.frompyfunc, which is built...
Open the file in universal-newline mode using the CSV Django module
...am trying to access a model.filefield in Django to parse a CSV file in Python using the csv module. It's working on Windows, but on Mac it gave me this:
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Is there a Google Voice API? [closed]
... as of 2019.
"pygooglevoice" can perform most of the voice functions from Python. It can send SMS. I've developed code to receive SMS messages, but the overhead is excessive given the current Google Voice interface. Each poll returns over 100K of content, so you'd use a quarter-gigabyte a day ju...
Days between two dates? [duplicate]
...r days, or groups of 24 hours?
For simply 24 hours, assuming you're using Python's datetime, then the timedelta object already has a days property:
days = (a - b).days
For calendar days, you'll need to round a down to the nearest day, and b up to the nearest day, getting rid of the partial day o...
Why does pylint object to single character variable names?
I'm still getting used to python conventions and using pylint to make my code more pythonic, but I'm puzzled by the fact that pylint doesn't like single character variable names. I have a few loops like this:
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How to store a dataframe using Pandas
...tter for interoperability, as a faster alternative to JSON, or if you have python object/text-heavy data (see this question).
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ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.al
... the two arrays to be evaluated in boolean context (by
calling __bool__ in Python3 or __nonzero__ in Python2).
Your original code
mask = ((r["dt"] >= startdate) & (r["dt"] <= enddate))
selected = r[mask]
looks correct. However, if you do want and, then instead of a and b use (a-b).any...
Counting inversions in an array
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In Python
# O(n log n)
def count_inversion(lst):
return merge_count_inversion(lst)[1]
def merge_count_inversion(lst):
if len(lst) <= 1:
return lst, 0
middle = int( len(lst) / 2 )
left, a = merge_cou...
Get list of all routes defined in the Flask app
...ution above is too complex.
Just open a new shell under your project:
python
>>> from app import app
>>> app.url_map
The first 'app' is my project script: app.py,
another is my web's name.
(this solution is for tiny web with a little route)
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