ex1.py

# -*- coding: utf-8 -*-

def columns_to_county(foo):
    county = {}
    county["id"] = int(foo[0])
    county["name"] = foo[1]
    county["lon"] = float(foo[3])
    county["lat"] = float(foo[4])

    return county

fh = open("data/lan.csv", "r", encoding="utf-8")
data = fh.read()
lines = data.split("\n")

counties = []
for line in lines:
    columns = line.split(";")
    county = columns_to_county(columns)
    counties.append(county)

print("Number of counties: ", len(counties))

def get_sort_key(county_dict):
    return county_dict["lat"]

print("From south to north:")
counties = sorted(counties, key=get_sort_key)
for county in counties:
    print(county["name"])

print()

part_of_sweden = {}
part_of_sweden["G"] = []
part_of_sweden["S"] = []
part_of_sweden["N"] = []

for county in counties:
    if county["lat"] > 60.78:
        part = "N"
    elif county["lat"] > 58.41:
        part = "S"
    else:
        part = "G"

    part_of_sweden[part].append(county)

print("Götaland:")
for county in part_of_sweden["G"]:
    print(county["name"])
print()

print("Svealand:")
for county in part_of_sweden["S"]:
    print(county["name"])
print()

print("Norrland:")
for county in part_of_sweden["N"]:
    print(county["name"])

ex2.py

from collections import defaultdict

with open("data/postnummer.txt", "r", encoding="utf-8") as fh:
    data = fh.read()
    lines = data.split("\n")

    zip_codes = []
    for line in lines:
        columns = line.split(";")

        zip_code = {
                    "postnr": columns[0],
                    "kommun": columns[1],
                    "lankod": columns[2],
                    "lannamn": columns[3],
                    "kommunkod": columns[4],
                    "kommunnamn": columns[5],
                }

        zip_codes.append(zip_code)

    kommuntabell = defaultdict(list)
    for zip_code in zip_codes:
        kommuntabell[zip_code["kommunkod"]].append(zip_code["postnr"])

    kommunlista = []
    for kommunkod, postnr in kommuntabell.items():
        kommun = {}
        kommun["kod"] = kommunkod
        kommun["postnr"] = postnr
        kommun["antal"] = len(postnr)
        kommunlista.append(kommun)

    def sort_by_antal(kommun):
        return kommun["antal"]

    kommunlista = sorted(kommunlista, key=sort_by_antal, reverse=True)

    for i, kommun in enumerate(kommunlista):
        if i <= 10:
            print(kommun["kod"], kommun["antal"])

ex3.py

from collections import defaultdict

with open("data/postnummer.txt", "r", encoding="utf-8") as fh:
    data = fh.read()
    lines = data.split("\n")

    zip_codes = []
    for line in lines:
        columns = line.split(";")

        zip_code = {
                    "postnr": columns[0],
                    "kommun": columns[1],
                    "lankod": columns[2],
                    "lannamn": columns[3],
                    "kommunkod": columns[4],
                    "kommunnamn": columns[5],
                }

        zip_codes.append(zip_code)

    postnrtabell = defaultdict(list)
    for zip_code in zip_codes:
        postnrtabell[zip_code["postnr"]].append(zip_code["kommunkod"])

    for postnr, kommuner in postnrtabell.items():
        if len(kommuner) > 1:
            print(postnr, kommuner)