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How do I comment in CoffeeScript? “/* this */” doesn't work
...haracter seems pretty minimal ;)
Also:
###
This block comment (useful for ©-Copyright info) also gets
passed on to the browsers HTML /* like this! */
###
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Prepend a level to a pandas MultiIndex
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A nice way to do this in one line using pandas.concat():
import pandas as pd
pd.concat([df], keys=['Foo'], names=['Firstlevel'])
An even shorter way:
pd.concat({'Foo': df}, names=['Firstlevel'])
This can be generalized to many data frames, see the docs.
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Can you attach Amazon EBS to multiple instances?
...can I use this same setup and attach the EBS to multiple machine instances or what's another solution?
11 Answers
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How can I count the occurrences of a list item?
...ple items. Calling count in a loop requires a separate pass over the list for every count call, which can be catastrophic for performance. If you want to count all items, or even just multiple items, use Counter, as explained in the other answers.
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How can I disable logging while running unit tests in Python Django?
...ng.CRITICAL)
will disable all logging calls with levels less severe than or equal to CRITICAL. Logging can be re-enabled with
logging.disable(logging.NOTSET)
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How do I unbind “hover” in jQuery?
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$(this).unbind('mouseenter').unbind('mouseleave')
or more succinctly (thanks @Chad Grant):
$(this).unbind('mouseenter mouseleave')
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Escaping ampersand in URL
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:- %26 is not working for me. Is there any other solution.?
– Sanjiv
Aug 23 '16 at 6:12
2
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How are booleans formatted in Strings in Python?
...ic to boolean values - %r calls the __repr__ method on the argument. %s (for str) should also work.
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What replaces cellpadding, cellspacing, valign, and align in HTML5 tables?
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/* cellpadding */
th, td { padding: 5px; }
/* cellspacing */
table { border-collapse: separate; border-spacing: 5px; } /* cellspacing="5" */
table { border-collapse: collapse; border-spacing: 0; } /* cellspacing="0" */
/* valign */
th, td { vertical-align: top; }
/* align (center) */
table ...
How to alter a column and change the default value?
I got the following error while trying to alter a column's data type and setting a new default value:
7 Answers
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