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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...
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...
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....
Check if a program exists from a Makefile
...
is this what you did?
check: PYTHON-exists
PYTHON-exists: ; @which python > /dev/null
mytarget: check
.PHONY: check PYTHON-exists
credit to my coworker.
share
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Change IPython/Jupyter notebook working directory
When I open a Jupyter notebook (formerly IPython) it defaults to C:\Users\USERNAME .
31 Answers
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How to get all possible combinations of a list’s elements?
... of 15 items. In fact, an example implementation is given on the standard python "itertools" doc page: docs.python.org/library/itertools.html (grep for "powerset").
– Dan H
Nov 16 '11 at 17:45
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How to color System.out.println output? [duplicate]
...DR
java: System.out.println((char)27 + "[31m" + "ERROR MESSAGE IN RED");
python: print(chr(27) + "[31m" + "ERROR MESSAGE IN RED")
bash or zsh: printf '\x1b[31mERROR MESSAGE IN RED'
this may also work for Os X: printf '\e[31mERROR MESSAGE IN RED'
sh: printf 'CTRL+V,CTRL+[[31mERROR MESSAGE IN RED...
How bad is shadowing names defined in outer scopes?
...s NameError if you didn't have a global name data.
Also remember that in Python everything is an object (including modules, classes and functions) so there's no distinct namespaces for functions, modules or classes. Another scenario is that you import function foo at the top of your module, and us...