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How to state in requirements.txt a direct github source

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pydot and graphviz error: Couldn't import dot_parser, loading of dot files will not be possible

...b3f1, and thus pydot >= 1.1 will be compatible with pyparsing >= 1.5.7. Answer applicable to pydot <= 1.0.28: For anyone else who comes across this, it is due to the changes in pyparsing from 1.x to the 2.x release. To install pydot using pip, first install the older version of pyparsin...
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How to merge a transparent png image with another image using PIL

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SQL Server Insert if not exists

...ction executes the INSERT, i.e. a race condition. See stackoverflow.com/a/3791506/1836776 for a good answer on why even wrapping in a transaction doesn't solve this. share | improve this answer ...
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Simple explanation of MapReduce?

...nstances of a reduce function. Such as if you have a list of numbers, say [7, 8, 9] and you want them summed up, you'd write a loop like this A = [7, 8, 9] sum = 0 foreach (item in A) sum = sum + A[item] But, if you have access to a reduce function, you could write it like this A = [7, 8, 9] sum...
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How to make type=“number” to positive numbers only

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Deleting all files in a directory with Python

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load and execute order of scripts

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How do I get the day of week given a date?

...> datetime.datetime.today() datetime.datetime(2012, 3, 23, 23, 24, 55, 173504) >>> datetime.datetime.today().weekday() 4 From the documentation: Return the day of the week as an integer, where Monday is 0 and Sunday is 6. ...
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Using IQueryable with Linq

... | edited May 23 '17 at 11:47 Community♦ 111 silver badge answered Oct 16 '09 at 16:08 ...