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
A multi-dimensional dictionary is simply a dictionary where the values are themselves also dictionaries, creating a nested structure: You’d have to detect that you already created new_dic[1] each time, though, to not accidentally wipe that nested object for additional keys under new_dic[1]. You can simplify creating nested dictionaries using various techniques; using dict.setdefault() for example: dict.setdefault() will only set a key … Read more
If the string is convertable to integer, it should be digits only. It should be noted that this approach, as @cwallenpoole said, does NOT work with negative inputs beacuse of the ‘-‘ character. You could do: If you already have Number confirmed as a float, you can always use is_integer (works with negatives):
List all python (.py) files in the current folder and put them as __all__ variable in __init__.py
What is X? If it is a 2D-array, how can you then compare its row to a number: i < 3? EDIT after OP’s comment: add to A all rows from X where the first element < 3: