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Get exception description and stack trace which caused an exception, all as a string
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ianace
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answered Dec 30 '10 at 17:05
kindallkindall
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How can I get the full object in Node.js's console.log(), rather than '[Object]'?
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edited Sep 4 '18 at 18:28
Ikbel
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answered May ...
Check if OneToOneField is None in Django
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To check if the (OneToOne) relation exists or not, you can use the hasattr function:
if hasattr...
How do I request a file but not save it with Wget? [closed]
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Use q flag for quiet mode, and tell wget to output to stdout with O- (uppercase o) and redirec...
How to correctly close a feature branch in Mercurial?
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218
One way is to just leave merged feature branches open (and inactive):
$ hg up default
$ hg me...
What Ruby IDE do you prefer? [closed]
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25 Answers
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Active
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How to find all serial devices (ttyS, ttyUSB, ..) on Linux without opening them?
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12 Answers
12
Active
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How can I add numbers in a Bash script?
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For integers:
Use arithmetic expansion: $((EXPR))
num=$((num1 + num2))
num=$(($num1 + $num2)) # Also works
num=$((num1 + 2 + 3)) # ...
num=$[num1+num2] # Old, deprecated arithmetic expression syntax
Using the external expr utility. Note that this is only needed for ...
R programming: How do I get Euler's number?
For example, how would I go about entering the value e^2 in R?
3 Answers
3
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Define a lambda expression that raises an Exception
... however allow you to conditionally raise exceptions, e.g.:
y = lambda x: 2*x if x < 10 else raise_(Exception('foobar'))
Alternatively you can raise an exception without defining a named function. All you need is a strong stomach (and 2.x for the given code):
type(lambda:0)(type((lambda:0)....