mawillcockson

Keybase proof

I hereby claim:

• I am mawillcockson on github.
• I am mawillcockson (https://keybase.io/mawillcockson) on keybase.
• I have a public key ASDtn4sIGl7SslZu-ioUZwJ0JWd_6HC49F14VxV4YDP7kAo

To claim this, I am signing this object:

mawillcockson

#!/bin/env python
"""
https://twitter.com/dave_universetf/status/1342688553264762880
"""
import sys
from typing import List


def split_by_dots(dotted_quad: str) -> List[int]:
    "turns '1.2.3.4' into [1,2,3,4]"

mawillcockson

# https://twitter.com/IsntTrivial/status/1344185584013742086
echo "sum(map(abs, map(operator.sub, p, q)))"
python -m timeit \
    -s "import operator;p=q=range(-10_000, 10_000, 1);" \
    -s "def manhattan_distance(p, q): return sum(map(abs, map(operator.sub, p, q)))" \
    "manhattan_distance(p, q)"
echo ""

echo "sum(abs(x - y) for x, y in zip(p, q))"
python -m timeit \

mawillcockson

#!/bin/sh
# This is a very dumb script: run it more than once, and it will mess things up.
#
# This is meant to be run from as a regular user.
#
# At the end, when the command virt-manager is run from bash, virt-manager will
# be launched with access to virt-bootstrap.
#
# To uninstall, remove the following directories and files:
# ~/.local/lib/virt-bootstrap

mawillcockson

"""
example of subclassing pathlib.Path

the current downside is repr() shows a PosixPath or WindowsPath

mypy --strict is satisfied by the call to cast(), and as long as the __new__()
method returns an object of type pathlib.Path, everything else should work,
since the created object will be the same as if it were created with pathlib.Path

mypy will complain, as it does not like the Path type on the last line

mawillcockson

"""
NOTE: This sort of "subclassing" only allows modifying how the object is instantiated.
Other methods added to deriving classes aren't present on the instance.

For example, the following fails with an AttributeError:

class Example(StrictPath, Path):
    "example subclass with a method"
    
    def method(self) -> None:

mawillcockson

"""
neither pylint nor mypy catch this error, even with the most stringent checks
"""


def func() -> int:
    "raises an exception"
    raise RuntimeError("i can't do it :(")

mawillcockson

"""
black --version
black, version 20.8b1

comments indicate how black reformats the above line
all of these are treated as valid in Python 3.6+
"""
from typing import List, Tuple

name: List[Tuple[float]] = []

mawillcockson

# mypy: allow-any-expr
"""
usage: add_number_phrase [[start] stop]

finds binary operations of addition, subtraction, division, or multiplication
that result in a value that's equal to the number of letters of all of the
names of the numbers used in the calculation

start: number to start at (1 if not specified)
stop: number to stop at

mawillcockson

"""
tells the time difference between input events
"""
import math
from datetime import datetime, timedelta
from typing import List


def now() -> datetime:
    "returns a timezone-aware object for the time when it's called"