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Ubuntu running `pip install` gives error 'The following required packages can not be built: * freety

When performing pip install -r requirements.txt , I get the following error during the stage where it is installing matplotlib : ...
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How can I do DNS lookups in Python, including referring to /etc/hosts?

... I'm not really sure if you want to do DNS lookups yourself or if you just want a host's ip. In case you want the latter, import socket print(socket.gethostbyname('localhost')) # result from hosts file print(socket.gethostbyname('googl...
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Get content uri from file path in android

... the above solutions returns: 1. file:///storage/emulated/0/DCIM/Camera/VID_20140312_171146.mp4 2. /storage/emulated/0/DCIM/Camera/VID_20140312_171146.mp4 But what i was looking for is something different. I need the content:// format URI. The answer from Jinal seems to work perfect ...
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Are strongly-typed functions as parameters possible in TypeScript?

...f the types of its argument and its return type. Here we specify that the callback parameter's type must be "function that accepts a number and returns type any": class Foo { save(callback: (n: number) => any) : void { callback(42); } } var foo = new Foo(); var strCallback = (re...
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Convert a matrix to a 1 dimensional array

I have a matrix (32X48). 10 Answers 10 ...
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Remove all special characters, punctuation and spaces from string

I need to remove all special characters, punctuation and spaces from a string so that I only have letters and numbers. 16 A...
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Package cairo was not found in the pkg-config search path. Node j.s install canvas issue

I am having a problem installing installing the canvas module in node..It seems to be something with cairo I am getting this error... ...
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VS2005混合编译ARM汇编代码 - C/C++ - 清泛网 - 专注C/C++及内核技术

...ame this block of code EXPORT TEST IMPORT iGlobal ; ; Called from C as int ARMTEST1(int, int, int, int); ; The first 4 parameters are passed in r0-r3, more parameters would be passed on the stack ; TEST proc add r0,r0,r1 ; add all of the inputs together add r0,r0...
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Split a module across several files

... Rust's module system is actually incredibly flexible and will let you expose whatever kind of structure you want while hiding how your code is structured in files. I think the key here is to make use of pub use, which will allow you to re-export identi...
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Javascript what is property in hasOwnProperty?

...ty returns a boolean value indicating whether the object on which you are calling it has a property with the name of the argument. For example: var x = { y: 10 }; console.log(x.hasOwnProperty("y")); //true console.log(x.hasOwnProperty("z")); //false However, it does not look at the prototype ...