Cacher is the code snippet organizer for pro developers

from datetime import datetime
import csv
import math
import sys
import time


class Record(object):

    EARTH_RADIUS_IN_KM = 6371
    # cheney
    START_COORDINATE = (47.4875, 117.5747)

    date = None
    coordinate = None
    magnitude = None
    depth = None
    source = None
    impact = None
    distance = None

    def __init__(self):
        super(Record, self).__init__()

    # def __getitem__(self, attr):
    #     return self[attr]

    @staticmethod
    def calculate_impact(record):
        if not isinstance(record, Record):
            raise TypeError("Invalid type '%s'" % type(record))
        return max(0, (1000 - record.depth) * record.magnitude)

    @staticmethod
    def convert_date(elements):
        # pad zeros for time (hhmmss.mm)
        elements[3] = elements[3].zfill(6)
        date_str = ",".join(elements[0:4])
        formatter = Record.get_date_format(date_str)
        date_object = time.strptime(date_str, formatter)
        return datetime.fromtimestamp(time.mktime(date_object))

    @staticmethod
    def get_date_format(s):
        if "." in s:
            return "%Y,%m,%d,%H%M%S.%f"
        return "%Y,%m,%d,%H%M%S"

    @staticmethod
    def get_distance(start_coordinate, end_coordinate):
        lat1, long1 = map(math.radians, start_coordinate)
        lat2, long2 = map(math.radians, end_coordinate)
        dlat = lat2 - lat1
        dlong = long2 - long1
        a = math.sin(dlat / 2) ** 2 + \
            math.cos(lat1) * math.cos(lat2) * \
            math.sin(dlong / 2) ** 2
        c = 2 * math.atan2(math.sqrt(a), math.sqrt(1 - a))
        return Record.EARTH_RADIUS_IN_KM * c

    @staticmethod
    def load(filename, limit=None, progress=2500):
        all_magnitudes = []
        data = []
        sys.stdout.write("Loading file")
        with open(filename, "r") as f:
            # skip headers
            f.readline()
            for index, line in enumerate(csv.reader(f)):
                if limit is not None and index > limit:
                    break
                if index % progress == 0:
                    sys.stdout.write(".")
                    sys.stdout.flush()
                try:
                    record = Record.parse(line)
                    if record:
                        data.append(record)
                        all_magnitudes.append(record.magnitude)
                except:
                    pass
        sys.stdout.write("\n")
        return (data, all_magnitudes)

    @staticmethod
    def parse(elements):
        if len(elements) != 10:
            raise Exception("Invalid number of elements")
        record = Record()
        record.date = Record.convert_date(elements)
        record.coordinate = tuple(map(float, elements[4:6]))
        # coordinates as a string
        # elements[6]
        record.magnitude = float(elements[7])
        record.depth = int(elements[8]) if elements[8] else 0
        record.source = elements[9]
        record.impact = Record.calculate_impact(record)
        record.distance = Record.get_distance(Record.START_COORDINATE,
                                              record.coordinate)
        return record

import math


class Statistics(object):
    @staticmethod
    def statistics(elements):
        result = (Statistics.mean(elements), Statistics.median(elements), Statistics.std_dev(elements))
        print("""
          mean: %.2f
        median: %.2f
      std. dev: %.2f\n""" % result)

    @staticmethod
    def mean(elements):
        return sum(elements) / len(elements)

    @staticmethod
    def median(elements):
        elements = sorted(elements)
        midpoint = int((1 + (len(elements) - 1)) / 2)
        if len(elements) % 2 == 0:
            return (elements[midpoint] + elements[midpoint - 1]) / 2.0
        return elements[midpoint / 2]

    @staticmethod
    def std_dev(elements):
        diff = 0.0
        average = Statistics.mean(elements)
        for x in elements:
            diff += (x - average) ** 2
        return math.sqrt(diff / len(elements))

#!/usr/bin/env python

import os
import sys
import operator
from Record import Record
from Statistics import Statistics


class Application(object):

    data = None
    all_magnitudes = None

    """docstring for Application"""
    def __init__(self, filename, limit=None, progress=2500):
        super(Application, self).__init__()
        self.menu = Menu()
        self.data, self.all_magnitudes = Record.load(filename, limit, progress)

    def select_option(self):
        while True:
            choice = raw_input(self.menu.display)
            if choice:
                item = self.menu.get(choice.upper())
            if item:
                item.comparator(self.data if choice != "4" else self.all_magnitudes, item)


class Menu(object):
    class Item(object):
        """docstring for Item"""
        def __init__(self, option, title, comparator=None, renderer=None):
            super(Menu.Item, self).__init__()
            self.option = option
            self.title = title
            self.comparator = comparator
            self.renderer = renderer

        def render(self):
            return "  %s. %s" % (self.option, self.title)

    """docstring for Menu"""
    def __init__(self):
        super(Menu, self).__init__()
        items = [
            self.Item("1", "Top 100 Magnitude Earthquakes (date, magnitude, depth)",
                lambda data, item: Menu.sort("magnitude", data, item, 100),
                lambda x: "%s\t%.2f\t%d" % (str(x.date), x.magnitude, x.depth)),

            self.Item("2", "Top 50 Shallowest Earthquakes (date, magnitude, depth)",
                lambda data, item: Menu.sort("depth", data, item, 50, True),
                lambda x: "%s\t%.2f\t%d" % (str(x.date), x.magnitude, x.depth)),

            self.Item("3", "Top 50 Earthquakes closest to Cheney, WA (date, coordinates, distance from Cheney)",
                lambda data, item: Menu.sort("distance", data, item, 50, True),
                lambda x: "%s\t%s\t%.2f" % (str(x.date), x.coordinate, x.distance)),

            self.Item("4", "Mean, Midpoint, Median and Standard Deviation of Earthquake Magnitude",
                lambda data, item: Statistics.statistics(data),
                None),

            self.Item("5", "Top 50 Earthquakes by Impact (date, magnitude, depth, impact)",
                lambda data, item: Menu.sort("impact", data, item, 50),
                lambda x: "%s\t%.2f\t%d\t%.2f" % (str(x.date), x.magnitude, x.depth, x.impact)),

            self.Item("Q", "Exit",
                lambda x, y: sys.exit(0))
        ]

        self.options = dict((x.option, x) for x in items)
        self.display = "\n".join([x.render() for x in items]) + "\n\nSelect an option: "

    def get(self, option):
        return self.options.get(option)

    def display(self):
        return self.display

    # todo: separate
    @staticmethod
    def sort(key_name, data, item, count=50, descending=False):
        print(item.title)
        if not item.renderer:
            return
        direction = False if descending else True
        key_name = key_name.lower()
        data.sort(key=operator.attrgetter(key_name), reverse=direction)
        for x in data[:count]:
            print(item.renderer(x))
        # return data[:count]


def main():
    app = Application("eqdata.csv", progress=20000)
    os.system("cls" if os.name == "nt" else "clear")
    app.select_option()

if __name__ == '__main__':
    main()