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How to list all installed packages and their versions in Python?

... It doesn't support python 3 (just installed from pip and got runtime errors) – Ohad Cohen Apr 28 '18 at 13:57 add a comment  |  ...
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Are global variables in PHP considered bad practice? If so, why?

... But the error mostly shows in which file/line the script is breaking so.. I don't see the problem here – samayo Dec 30 '13 at 17:42 ...
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Eager load polymorphic

...oreign_key: 'reviewable_id'.But be care, Review.includes(:shop) will raise error, it must append at lease one where clause. – raykin Apr 9 '14 at 10:29 51 ...
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rmagick gem install “Can't find Magick-config”

I get the error shown below when attempting to install the rmagick gem. I am on Snowleopard 10.6 using RVM, Ruby 1.9.2-head and Rails 3.05. Responses to similar questions recommended installing ImageMagick, which I successfully did. Other suggested installing the "libmagick9-dev library", however, I...
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Increasing (or decreasing) the memory available to R processes

...rvard.edu/zelig/docs/How_do_I2.html (mirror) Windows users may get the error that R has run out of memory. If you have R already installed and subsequently install more RAM, you may have to reinstall R in order to take advantage of the additional capacity. You may also set th...
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TimePicker Dialog from clicking EditText

... mTimePicker.show(); } }); That should fix your second error, you weren't providing the last parameter. TimePickerDialog Constructors share | improve this answer | ...
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Why is the gets function so dangerous that it should not be used?

... head the trouble off sooner rather than later. I'd be prepared to add an error message: fputs("obsolete and dangerous function gets() called\n", stderr); Modern versions of the Linux compilation system generates warnings if you link gets() — and also for some other functions that also have s...
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Wait until file is unlocked in .NET

... the wait time between retries. NOTE: Unfortunately, the underlying Win32 error (ERROR_SHARING_VIOLATION) is not exposed with .NET, so I have added a small hack function (IsSharingViolation) based on reflection mechanisms to check this. /// <summary> /// Wraps sharing violations that...
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Import PEM into Java Key Store

... I've got a single certificate .pem and this doesn't work. 1795:error:0906D06C:PEM routines:PEM_read_bio:no start line:/usr/src/secure/lib/libcrypto/../../../crypto/openssl/crypto/pem/pem_lib.c:648:Expecting: TRUSTED CERTIFICATE – Brian Knoblauch Apr...
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Would it be beneficial to begin using instancetype instead of id?

...le fileHandleWithStandardOutput] writeData:formattedData] will generate an error on Mac OS X (only) Multiple methods named 'writeData:' found with mismatched result, parameter type or attributes. The reason is that both NSFileHandle and NSURLHandle provide a writeData:. Since [NSFileHandle fileHandl...