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Abstract methods in Python [duplicate]
...uently.
class Base(object):
def go(self):
raise NotImplementedError("Please Implement this method")
class Specialized(Base):
def go(self):
print "Consider me implemented"
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What is the easiest way to duplicate an activerecord record?
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When I do this, I get an unknown attribute error with one column because of a column that is there due to a has_many relationship. Is there any way around this?
– Ruben Martinez Jr.
Jul 5 '14 at 19:57
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Should you always favor xrange() over range()?
...cent call last):
File "<stdin>", line 1, in <module>
OverflowError: Python int too large to convert to C long
Python 3 does not have this problem:
Python 3.2.3 (default, Jul 14 2012, 01:01:48)
[GCC 4.7.1] on linux2
Type "help", "copyright", "credits" or "license" for more informati...
How is location accuracy measured in Android?
...ation is within that radius of the measured point in meters. Assuming that errors are normally distributed (which, as the docs say, is not necessarily true), that means that this is one standard deviation. For example, if Location.getAccuracy returns 10, then there's a 68% chance the true location o...
What does the “Just” syntax mean in Haskell?
... value was either constructed via Just or Nothing, there are no other (non-error) possibilities.
Since Nothing has no parameter type, when it's used as a constructor it names a constant value that is a member of type Maybe a for all types a. But the Just constructor does have a type parameter, whic...
How to create a windows service from java app
...d "stop(String[] argv)" would work, but "start()" and "stop()" would cause errors. If you can't modify those calls, consider making a bootstrapper class that can massage those calls to fit your needs.
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Does python have an equivalent to Java Class.forName()?
...In [59]: raise import_class_from_string('google.appengine.runtime.apiproxy_errors.DeadlineExceededError')()
---------------------------------------------------------------------------
DeadlineExceededError Traceback (most recent call last)
<ipython-input-59-b4e59d809b2f> in...
How to check if there's nothing to be committed in the current branch?
...t , if we use this if [ -z $(git status --porcelain) ]; it will get some error , [: ??: binary operator expected I find the manual and use this if [ -z $(git status --short) ]; this can work, thanks!
– 9nix00
Feb 28 '11 at 7:52
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How do I modify a MySQL column to allow NULL?
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Your syntax error is caused by a missing "table" in the query
ALTER TABLE mytable MODIFY mycolumn varchar(255) null;
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Visual Studio build fails: unable to copy exe-file from obj\debug to bin\debug
... can confirm that when using an assembly version such as "2.0.*" I get the error, but when I instead use "2.0.0" it works as a charm! I urge more people to test this, and if you find it working please vote up this answer, because this is something that needs to be known! Hope Microsoft picks up on t...