Assuming Python 3 (in Python 2, this difference is a little less well-defined) – a string is a sequence of characters, ie unicode codepoints; these are an abstract concept, and can’t be directly stored on disk. A byte string is a sequence of, unsurprisingly, bytes – things that can be stored on disk. The mapping between them is … Read more
If you look at the line which is causing the error, you’ll see this: This line comment states the dependency as numpy+mkl (numpy with Intel Math Kernel Library). This means that you’ve installed the numpy by pip, but the scipy was installed by precompiled archive, which expects numpy+mkl. This problem can be easy solved by installation for numpy+mkl from whl file from here.
The wikipedia page is wrong, I’ve corrected it. | and & are not boolean operators, even though they are eager operators, which just means that they are not short circuit operators. As you probably know, here’s how the python and and or operators work: As far as I know, python has no eager boolean operators, they would have to be explicitly coded, for instance like … Read more
Use the to_datetime function, specifying a format to match your data.
The specific error happens when the Python interpreter can’t find a particular “.py” file. In your case, it is the file “utils.py”. First you need to find which file is trying to import “utils.py”. Starting with your main file, look up all the files you are importing. (I am guessing this issue is coming from … Read more
You have four options Finite Differences Automatic Derivatives Symbolic Differentiation Compute derivatives by hand. Finite differences require no external tools but are prone to numerical error and, if you’re in a multivariate situation, can take a while. Symbolic differentiation is ideal if your problem is simple enough. Symbolic methods are getting quite robust these days. SymPy is … Read more
Seaborn’s barplot returns an axis-object (not a figure). This means you can do the following:
For file operations, Python uses the operating system’s default buffering unless you configure it do otherwise. You can specify a buffer size, unbuffered, or line buffered. For example, the open function takes a buffer size argument. http://docs.python.org/library/functions.html#open “The optional buffering argument specifies the file’s desired buffer size:” 0 means unbuffered, 1 means line buffered, any … Read more
It’s because you have: without a matching except block after the try: block. Every try must have at least one matching except. See the Errors and Exceptions section of the Python tutorial.
You can tell pip where to install the package. Use the -t flag , that means the target directory where you want to install the package. Have have look at pip install –help You can change this on permanent basis by changing the pip.ini configuration file. See this for detail: pip install path On Unix and Mac OS X the configuration … Read more