bsweger

Useful Pandas Snippets

A personal diary of DataFrame munging over the years.

Data Types and Conversion

Convert Series datatype to numeric (will error if column has non-numeric values)
(h/t @makmanalp)

atheriel

PyObject * RustPy_InitModule(const char *name, PyMethodDef *methods, const char *doc) {
    // return Py_InitModule4(name, methods, doc, (PyObject *) NULL, PYTHON_API_VERSION);
    return Py_InitModule3(name, methods, doc);
}

lelandbatey

Description

This simple script will take a picture of a whiteboard and use parts of the ImageMagick library with sane defaults to clean it up tremendously.

The script is here:

#!/bin/bash
convert "$1" -morphology Convolve DoG:15,100,0 -negate -normalize -blur 0x1 -channel RBG -level 60%,91%,0.1 "$2"

Results

huonw

while {
    let x = foo();
    bar(x);

    x != 0
} {}

jnrbsn

import inspect

def privatemethod(func):
    """decorator for making an instance method private"""
    def func_wrapper(*args, **kwargs):
        """decorator wrapper function"""
        outer_frame = inspect.stack()[1][0]
        if 'self' not in outer_frame.f_locals or outer_frame.f_locals['self'] is not args[0]:
            raise Exception('%s.%s is a private method' % (args[0].__class__.__name__, func.__name__))
        func(*args, **kwargs)

tylerneylon

-- Two dashes start a one-line comment.

--[[
     Adding two ['s and ]'s makes it a
     multi-line comment.
--]]

----------------------------------------------------
-- 1. Variables and flow control.
----------------------------------------------------

amitchhajer

git ls-files -z | xargs -0n1 git blame -w | perl -n -e '/^.*\((.*?)\s*[\d]{4}/; print $1,"\n"' | sort -f | uniq -c | sort -n

henrik

Install ImageMagick for image conversion:

brew install imagemagick

Install tesseract for OCR:

brew install tesseract --all-languages

Or install without --all-languages and install them manually as needed.