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Cluster analysis in R: determine the optimal number of clusters
...rflow.com/q/2018178/1075993. I guess that other graphical methods could be converted to analytical as well.
– Andrey Sapegin
Mar 25 '15 at 9:45
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“Inner exception” (with traceback) in Python?
...2
It's simple; pass the traceback as the third argument to raise.
import sys
class MyException(Exception): pass
try:
raise TypeError("test")
except TypeError, e:
raise MyException(), None, sys.exc_info()[2]
Always do this when catching one exception and re-raising another.
...
Run function from the command line
...
In that case you can send sys.argv to the method. Or access it from the hello method
– Wolph
Feb 10 '18 at 8:48
3
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Manually raising (throwing) an exception in Python
...but if you insist.
You can preserve the stacktrace (and error value) with sys.exc_info(), but this is way more error prone and has compatibility problems between Python 2 and 3, prefer to use a bare raise to re-raise.
To explain - the sys.exc_info() returns the type, value, and traceback.
type,...
TypeError: 'NoneType' object is not iterable in Python
...'str' and 'NoneType' objects
What's going on here?
Python's interpreter converted your code to pyc bytecode. The Python virtual machine processed the bytecode, it encountered a looping construct which said iterate over a variable containing None. The operation was performed by invoking the __it...
How to disable python warnings
..."ignore")
Ex:
>>> import warnings
>>> def f():
... print('before')
... warnings.warn('you are warned!')
... print('after')
>>> f()
before
__main__:3: UserWarning: you are warned!
after
>>> warnings.filterwarnings("ignore")
>>> f()
before
after
...
Any way to properly pretty-print ordered dictionaries?
...order, so this probably applies to a small percentage of uses. Regardless, converting the OD it to a dict should avoid the issue of everything being placed on one line.
– martineau
Nov 29 '10 at 9:07
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IndentationError: unindent does not match any outer indentation level
...t Sublime Text to use tabs for indentation:
View --> Indentation --> Convert Indentation to Tabs
Uncheck the Indent Using Spaces option as well in the same sub-menu above.
This will immediately resolve this issue.
sha...
How to get the python.exe location programmatically? [duplicate]
...
This works in Linux & Windows:
Python 3.x
>>> import sys
>>> print(sys.executable)
C:\path\to\python.exe
Python 2.x
>>> import sys
>>> print sys.executable
/usr/bin/python
s...
Floating point vs integer calculations on modern hardware
...am doing some performance critical work in C++, and we are currently using integer calculations for problems that are inherently floating point because "its faster". This causes a whole lot of annoying problems and adds a lot of annoying code.
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