The default Python on OS X shouldn’t be messed with as it’s used by the OS itself. If your default is 2.6.1 then you must have Snow Leopard. If you just install from the standard 3.1 disk image then you can invoke it using python3.1 from the terminal (you don’t have to do any extra steps for this to … Read more
How should I declare main() method in Java? String[] and String… are the same thing internally, i. e., an array of Strings. The difference is that when you use a varargs parameter (String…) you can call the method like: And when you declare the parameter as a String array you MUST call this way: What’s actually the difference between String[] and String… if … Read more
Implementation 1 returns the magnitude of the vector that would result from a regular 3D cross product of the input vectors, taking their Z values implicitly as 0 (i.e. treating the 2D space as a plane in the 3D space). The 3D cross product will be perpendicular to that plane, and thus have 0 X … Read more
It’s on the top of the Homebrew homepage. From a Terminal prompt: The command brew install wget is an example of how to use Homebrew to install another application (in this case, wget) after brew is already installed. Historic… Before about 2020, the command given on the Homebrew page was:
Well, I just uncheck to connect automatically,from VM settings, then I switch from ‘Use pshysical drive’ to ISO path. after reboot I didn’t seen the error Or, just remove cv/dvd drive from the serting of the machine
If you’re inserting text content in your document in a location where text content is expected1, you typically only need to escape the same characters as you would in XML. Inside of an element, this just includes the entity escape ampersand & and the element delimiter less-than and greater-than signs < >: Inside of attribute values you must also escape … Read more
You can create subset of data with your condition and then use shape or len: Performance is interesting, the fastest solution is compare numpy array and sum: Code:
You need to pass your parameters into urlencode() as either a mapping (dict), or a sequence of 2-tuples, like: Python 3 or above Use: Note that this does not do url encoding in the commonly used sense (look at the output). For that use urllib.parse.quote_plus.
More code would be appreciated (specifically the ParamExample implementation), but I’m assuming you’re missing the __enter__ (and probably __exit__) method on that class. When you use a with block in python, the object in the with statement gets its __enter__ method called, the block inside the with runs, and then the __exit__ gets called (optionally with exception info if one was raised). Thus, if you don’t have an __enter__ defined … Read more
You can import them like this: scipy.math.factorial and numpy.math.factorial seem to simply be aliases/references for/to math.factorial, that is scipy.math.factorial is math.factorial and numpy.math.factorial is math.factorial should both give True.