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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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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...
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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Counting inversions in an array
...
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...
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...
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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Slow Requests on Local Flask Server
...g webservers.
Update (2020-07-25): It looks like gevent started supporting python3 5 years ago, shortly after I commented that it didn't, so you can use gevent now.
gevent
You can install gevent through pip with the command pip install gevent or pip3 with the command pip3 install gevent. Instruction...
Is there an equivalent to CTRL+C in IPython Notebook in Firefox to break cells that are running?
I've started to use the IPython Notebook and am enjoying it. Sometimes, I write buggy code that takes massive memory requirements or has an infinite loop. I find the "interrupt kernel" option sluggish or unreliable, and sometimes I have to restart the kernel, losing everything in memory.
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Styling multi-line conditions in 'if' statements? [closed]
...rence to using a backslash for line continuation." You can see this here: python.org/dev/peps/pep-0008/#maximum-line-length
– joshcartme
Jan 21 '13 at 21:54
8
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Refactoring in Vim
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CQuery for C/C++/Objective-C
Eclipse.jdt.ls for Java
pyls (with rope) for Python
javascript-typescript-langserver for for JavaScript and TypeScript
Solargraph for Ruby
gopls official lsp for Go (alpha stage in Nov 2019)
texlab for LaTeX
You can find more language servers under https://langserver....