juanarrivillaga

import collections

def drop(iterable, n):
    iterator = iter(iterable)
    buffer = collections.deque()
    for _ in range(n):
        try:
            val = next(iterator)
        except StopIteration:
            return

juanarrivillaga

Keybase proof

I hereby claim:

• I am juanarrivillaga on github.
• I am juan_arrivillaga (https://keybase.io/juan_arrivillaga) on keybase.
• I have a public key ASC5d4e7y9NLx-4klf4eye68-G8TDCtBlo08KzAUwzX2pwo

To claim this, I am signing this object:

juanarrivillaga

class Settings:
    def __init__(self):
        self.settingsID = 1

juanarrivillaga

>>> import dis
>>> def regular_loop(source):
...     result = []
...     for x in result:
...         result.append(x**2)
...     return result
...
>>> def list_comp(source):
...     result = [x**2 for x in source]
...     return result

juanarrivillaga

import pandas as pd
import matplotlib.pyplot as plt
import time

def filter_items_newlist(items, item):
    return [x for x in items if x != item]

def filter_items_inplace_gen(items, item):
    items[:] = (x for x in items if x != item)

juanarrivillaga

# note, using the %%timeit ipython magic, the expression on the first line is not included in the time testing

In [3]: %%timeit items = list(map(str, range(1)))
   ...: 'foo' in items
   ...:
   ...:
33 ns ± 1.79 ns per loop (mean ± std. dev. of 7 runs, 10000000 loops each)

In [4]: %%timeit items = set(map(str, range(1)))
   ...: 'foo' in items

juanarrivillaga

import types
class Function:
    def __init__(self, func):
        self._func = func
    def __call__(self, *args, **kwargs):
        return self._func(*args, **kwargs)
    def __get__(self, obj, objtype=None):
        "Simulate func_descr_get() in Objects/funcobject.c https://docs.python.org/3/howto/descriptor.html#functions-and-methods"
        if obj is None:
            return self

juanarrivillaga

class Server(object):
    def __init__(self, ip_address, username, password, port):
        self.ip_address = ip_address
        self.username = username
        self.password = password
        self.port = port
        self.update_base_url(ip_address, port)
    def update_base_url(self, ip_address, port):
        base_url = 'https://' + str(ip_address) + ':' + str(port) + '/'
        self.base_url = base_url

juanarrivillaga

You are looking for the built-in `dict` data-type. However, keys must be *hashable* objects. 
Python prevents you from shooting yourself in the foot by using a mutable object as a key 
(although, you can implement your own data-type which is mutable and hashable, but you *shouldn't*). 
Note, consider the following JS code:

    > m1 = new Map([['a', 1]])
    Map { 'a' => 1 }
    > m2 = new Map()
    Map {}
    > m2.set(m1, 3)

juanarrivillaga

# You can alleviate the nesting by using `and`, since your `else` statements are all equivalent up to a point
if (preset.exists('//*[@id="i0116"]', '10', '1') and log.enter_username()
      and preset.exists('//*[@id="i0116"]', '10', '1') and log.enter_password()):
   locked = unlock(details[0], details[1], browser, ' ', ' ', ' ')
   if not (locked.checkBlocked()):
   # unlock account
   else:
      searches = search(details[0], details[1], browser)
    else:
        browser.quit()