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Stop pip from failing on single package when installing with requirements.txt
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'main' is not a part of pip. Error.
– Pranzell
Jul 29 '19 at 14:29
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Define a lambda expression that raises an Exception
...ollowing also works: lambda: 1 / 0. You'll just end up with a ZeroDivisionError being thrown instead of a regular exception. Bear in mind that if the exception is allowed to propogate, it may look strange to someone debugging your code to start seeing a bunch of ZeroDivisionErrors.
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Inserting multiple rows in mysql
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When loading a table from a text file, use LOAD DATA INFILE. This is usually 20 times faster than using INSERT statements.
Optimizing INSERT Statements
You can find more tips on how to speed up your insert statements on the link above.
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Get the latest record from mongodb collection
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For anyone using AWS DocDB: Query failed with error code 303 and error message 'option $natural is not supported' on server docdb. Hopefully that feature comes soon.
– Marc
Apr 12 '19 at 18:58
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Batch files: How to read a file?
...mand would quit reading a line if it found a whitespace character. I eventually ended up using FOR /F "tokens=*" %%i IN (file.txt) DO @ECHO %%i
– Jason
Mar 27 '12 at 18:07
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Defining private module functions in python
...ent call last):
File "<stdin>", line 1, in <module>
AttributeError: 'Foo' object has no attribute '__bar'
>>> myFoo.PrintBar() # the class itself of course can access it
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>>> dir(Foo) # yet can see it
['PrintBar', '_Foo__bar', '__class__', '__delattr__', '__dict...
“User interaction is not allowed” trying to sign an OSX app using codesign
...is can be caused by a default timeout of 5 minutes, that will trigger this error after a long build.
To fix:
security set-keychain-settings -t 3600 -l ~/Library/Keychains/login.keychain
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How can I copy & paste, or duplicate, an existing project?
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Is there a simple way to convert C++ enum to string?
... I could not get this to compile in VS2015. I get a warning and an error: warning: multi-line comment [-Wcomment] #define MAKE_ENUM(name, ...) enum class name { VA_ARGS, __COUNT} error: stray '#' in program std*: string enumName = #name
– C...
Re-raise exception with a different type and message, preserving existing information
...hierarchy for the exceptions that it can raise (e.g. inheriting from a FooError abstract class for all the foo module's specific exceptions). This allows users of the module to catch those particular exceptions and handle them distinctly, if needed. But many of the exceptions raised from the mod...