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pydot and graphviz error: Couldn't import dot_parser, loading of dot files will not be possible
...r anyone else who comes across this, it is due to the changes in pyparsing from 1.x to the 2.x release.
To install pydot using pip, first install the older version of pyparsing:
pip install pyparsing==1.5.7
pip install pydot==1.0.28
If you did not install pyparsing using pip, but instead used set...
What are the functional differences between NW.js, Brackets-Shell and Electron?
...h regards to MP4 playback in brackets-shell and atom-shell? It's not clear from your answer whether this is a quirk in most WebKit distributions, or just in node-webkit.
– Sven Slootweg
Jun 10 '14 at 13:24
...
Get visible items in RecyclerView
...tManager, first/last depends on the adapter ordering. Don't query children from RecyclerView; LayoutManager may prefer to layout more items than visible for caching.
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Referring to the null object in Python
...is a built-in constant. As soon as you start Python, it's available to use from everywhere, whether in module, class, or function. NoneType by contrast is not, you'd need to get a reference to it first by querying None for its class.
>>> NoneType
NameError: name 'NoneType' is not defined
&g...
What is lexical scope?
...ed which is under the scope of function whatismyscope.
It will not bother from whatever it is being called(the global scope/from within another function even), that's why global scope value I am global will not be printed.
This is called lexical scoping where "functions are executed using the scop...
How do I shutdown, restart, or log off Windows via a bat file?
...l options:
-f — Forces programs to exit. Prevents the shutdown process from getting stuck.
-t <seconds> — Sets the time until shutdown. Use -t 0 to shutdown immediately.
-c <message> — Adds a shutdown message. The message will end up in the Event Log.
-y — Forces a "yes" answer...
Creating dataframe from a dictionary where entries have different lengths
...( A = np.array([1,2]), B = np.array([1,2,3,4]) )
In[21]: df = pd.DataFrame.from_dict(my_dict, orient='index')
In[22]: df
Out[22]:
0 1 2 3
A 1 2 NaN NaN
B 1 2 3 4
In[23]: df.transpose()
Out[23]:
A B
0 1 1
1 2 2
2 NaN 3
3 NaN 4
...
Setting a system environment variable from a Windows batch file?
Is it possible to set a environment variable at the system level from a command prompt in Windows 7 (or even XP for that matter). I am running from an elevated command prompt.
...
javax vs java package
...y as a library to work with earlier versions (which would be useful). Note from many years later: it actually ended up being in java after all.
I believe there are restrictions on the java package - I think classloaders are set up to only allow classes within java.* to be loaded from rt.jar or some...
Flask-SQLAlchemy import/context issue
... with the app right away - you can do this instead:
# apps.members.models
from flask_sqlalchemy import SQLAlchemy
db = SQLAlchemy()
class Member(db.Model):
# fields here
pass
And then in your application setup you can call init_app:
# apps.application.py
from flask import Flask
from ap...