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How to find if directory exists in Python

...en classes are callable. Also, functions are first-class values in Python, and you can use them without the parentheses notation, like in existing = filter(os.path.isdir(['/lib', '/usr/lib', '/usr/local/lib']) – phihag Mar 30 '13 at 7:38 ...
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Most efficient way to check for DBNull and then assign to a variable?

...ert(Of Integer)(oRow("Value")), iDefault) oSomeObject.StringMember = If(TryCast(oRow("Name"), String), sDefault) Function TryConvert(Of T As Structure)(ByVal obj As Object) As T? If TypeOf obj Is T Then Return New T?(DirectCast(obj, T)) Else Return Nothing End If End Fun...
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Python: What OS am I running on?

...wered Aug 5 '08 at 3:27 Louis BrandyLouis Brandy 15.1k33 gold badges3333 silver badges2929 bronze badges ...
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SQL select only rows with max value on a column [duplicate]

...'s how it looks with the above example, written in SQL SELECT id, CAST(SUBSTRING(max(packed_col) FROM 2 FOR 6) AS float) as max_rev, SUBSTRING(max(packed_col) FROM 11) AS content_for_max_rev FROM (SELECT id, CAST(1000 + rev + .001 as CHAR) || '---' || CAST(content AS char) ...
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Lua string to int

...Integer(number) return math.floor(tonumber(number) or error("Could not cast '" .. tostring(number) .. "' to number.'")) end In which case you explicitly convert the string (or really, whatever it is) into a number, and then truncate the number like an (int) cast would do in Java. Edit: This ...
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Performant Entity Serialization: BSON vs MessagePack (vs JSON)

...n alternative binary serialization format to Google's Protocol Buffers and JSON which also outperforms both. 6 Answer...
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mkdir -p functionality in Python [duplicate]

...ution other than a system call. I am sure the code is less than 20 lines, and I am wondering if someone has already written it? ...
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Append to a file in Go

... @SridharRatnakumar: see another comment and man umask. With typical umask of 022, you'll get typical permissions: 0666 & ~022 = 0644 = rw-r--r-- – akavel Oct 22 '13 at 19:52 ...
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Copy multiple files in Python

...in one directory to another directory using Python. I have the source path and the destination path as string. 6 Answers ...
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Python subprocess/Popen with a modified environment

I believe that running an external command with a slightly modified environment is a very common case. That's how I tend to do it: ...