ana_deaths.py

""" Analyzes output from NZ death registry search.

Input is some death records from printable (all) version of search on
https://bdmhistoricalrecords.dia.govt.nz
"""

import re
from datetime import datetime
import calendar

FIRST_RE = re.compile(r'^Mary$')
BIRTH_YEAR = 1864
JITTER = 5

# Select all, copy of some death records from printable (all) of search on
# bdmhistoricalrecords.dia.govt.nz
lines = """\
1936/19448	Dunn 	Mary Ann 	62Y
1940/19380	Dunn 	Helen Mary Hamilton 	68Y
1941/20389	Dunn 	Mary Jane 	81Y
1937/20726	Dunn 	Mary 	77Y
1937/24283	Dunn 	Julia Mary 	44Y
1942/26860	Dunn 	Mary 	86Y
1943/22614	Dunn 	Mary 	72Y
1939/24680	Dunn 	Mary Ellen 	82Y
1943/29192	Dunn 	Florence Mary 	49Y
1945/27823	Dunn 	Mary 	78Y
1946/17607	Dunn 	Mary Ann 	24H
1946/32686	Dunn 	Mary Stewart 	78Y
1922/8348	Dunn 	Mary Allen 	80Y
1933/3677	Dunn 	Mary Sophia Louisa 	83Y
1922/1413	Dunn 	Mary Josephine 	65Y
1929/8816	Dunn 	Mary 	89Y
1927/2011	Dunn 	Mary Ellen 	82Y
1930/992	Dunn 	Mary 	86Y
1931/6814	Dunn 	Mary Elizabeth 	64Y
1920/168	Dunn 	Mary 	54Y
1923/4753	Dunn 	Mary 	75Y
1926/6870	Dunn 	Mary 	79Y
1926/7114	Dunn 	Mary 	86Y
1915/2600	Dunn 	Beatrice Mary 	54Y
1923/9775	Dunn 	Mary Blanche 	78Y
1909/6801	Dunn 	Mary Elizabeth 	44Y
1876/2474	Dunn 	Mary 	68Y
1908/7403	Dunn 	Mary 	24Y
1900/4082	Dunn 	Mary Elizabeth 	66Y
1906/4155	Dunn 	Mary 	77Y
1895/2328	Dunn 	Mary 	20Y
1903/4159	Dunn 	Mary 	33Y
1882/750	Dunn 	Mary Elizabeth 	42Y
1901/7171	Dunn 	Rose Mary 	10Y
1905/8278	Dunn 	Mary 	58Y
1894/4050	Dunn 	Mary 	8D
1881/335	Dunn 	Mary Mabel 	15M
1890/1904	Dunn 	Mary 	34Y
1892/767	Dunn 	Mary 	27Y
1890/5410	Dunn 	Mary Elizabeth 	31Y
1889/4266	Dunn 	Mary 	54Y
1891/5170	Dunn 	Mary 	2M
1891/6173	Dunn 	Mary 	40Y
1886/3713	Dunn 	Mary 	62Y
1885/625	Dunn 	Mary 	56Y
1879/2569	Dunn 	Mary Ann 	76Y
1879/4012	Dunn 	Mary Elizabeth 	6W
1884/2339	Dunn 	Emma Mary Elizabeth 	18Y
1884/5153	Dunn 	Mary 	1H
1933/19544	Dunn 	Mary 	15Y
1916/1599	Dunn 	Mary Pauline 	10Y
1906/8279	Dunn 	Myrtle Mary 	5M
1936/19849	Dunn 	Mary Ann 	65Y
1926/9323	Dunn 	Mary Allan 	50Y
1942/31208	Dunn 	Edith Mary 	11M
1941/20187	Dunn 	Mary Caroline 	65Y
1922/3267	Dunn 	Mary 	57Y
1946/34848	Dunn 	Catherine Mary 	64Y
1949/31163	Dunn 	Mary Ann 	75Y
1873/4795	Dunn 	Mary 	30Y
1874/11089	Dunn 	Mary Agnes Somerville 	10M
1872/7297	Dunn 	Isabella Mary 	16M
1869/5529	Dunn 	Mary 	1H
1905/4432	Dunn 	Mary Somerville 	71Y
2005/12496	Miles 	Mary 	14 January 1935
1922/244	Dunn 	Mary 	66Y""".strip().splitlines()

YEAR_DIVS = dict(H=365.25 * 24, D=365.25, M=12, Y=1)  # Units to years conversion.

# Select records with chosen first name.
# Change age records to estimated year.
records = []
for line in lines:
    reg_no, last, firsts, age = [s.strip() for s in line.split('\t')]
    if not re.search(FIRST_RE, firsts):
        continue
    death_yr, no = reg_no.split('/')
    try:
        # Age is date of birth.
        dt = datetime.strptime(age, '%d %B %Y')
        birth_yr = (dt.year +
                    dt.timetuple().tm_yday / (365 + calendar.isleap(dt.year)))
    except ValueError:
        # Age is something of form: 10H, 5D, 3M, 66Y
        age_years = float(age[:-1]) / YEAR_DIVS[age[-1]]
        birth_yr = round(int(death_yr) - age_years, 1)
    if abs(birth_yr - BIRTH_YEAR) < JITTER:
        records.append((reg_no, death_yr, age, firsts, last, birth_yr))

for record in sorted(records, key=lambda r: r[-1]):
    print(*record)