Longest Sr-Jr 🇺🇸Nats Title Interval

us_nats_interval.py

from collections import defaultdict
import pprint

sr_women = {
    1914: 'Theresa Weld',
    1918: 'Rosemary Beresford',
    1920: 'Theresa Weld',
    1921: 'Theresa Weld Blanchard',
    1922: 'Theresa Weld Blanchard',
    1923: 'Theresa Weld Blanchard',
    1924: 'Theresa Weld Blanchard',
    1925: 'Beatrix Loughran',
    1926: 'Beatrix Loughran',
    1927: 'Beatrix Loughran',
    1928: 'Maribel Vinson',
    1929: 'Maribel Vinson',
    1930: 'Maribel Vinson',
    1931: 'Maribel Vinson',
    1932: 'Maribel Vinson',
    1933: 'Maribel Vinson',
    1934: 'Suzanne Davis',
    1935: 'Maribel Vinson',
    1936: 'Maribel Vinson',
    1937: 'Maribel Vinson',
    1938: 'Joan Tozzer',
    1939: 'Joan Tozzer',
    1940: 'Joan Tozzer',
    1941: 'Jane Vaughn',
    1942: 'Jane Vaughn Sullivan',
    1943: 'Gretchen Merrill',
    1944: 'Gretchen Merrill',
    1945: 'Gretchen Merrill',
    1946: 'Gretchen Merrill',
    1947: 'Gretchen Merrill',
    1948: 'Gretchen Merrill',
    1949: 'Yvonne C. Sherman',
    1950: 'Yvonne C. Sherman',
    1951: 'Sonya Klopfer',
    1952: 'Tenley Albright',
    1953: 'Tenley Albright',
    1954: 'Tenley Albright',
    1955: 'Tenley Albright',
    1956: 'Tenley Albright',
    1957: 'Carol Heiss',
    1958: 'Carol Heiss',
    1959: 'Carol Heiss',
    1960: 'Carol Heiss',
    1961: 'Laurence Owen',
    1962: 'Barbara Roles Pursley',
    1963: 'Lorraine Hanlon',
    1964: 'Peggy Fleming',
    1965: 'Peggy Fleming',
    1966: 'Peggy Fleming',
    1967: 'Peggy Fleming',
    1968: 'Peggy Fleming',
    1969: 'Janet Lynn',
    1970: 'Janet Lynn',
    1971: 'Janet Lynn',
    1972: 'Janet Lynn',
    1973: 'Janet Lynn',
    1974: 'Dorothy Hamill',
    1975: 'Dorothy Hamill',
    1976: 'Dorothy Hamill',
    1977: 'Linda Fratianne',
    1978: 'Linda Fratianne',
    1979: 'Linda Fratianne',
    1980: 'Linda Fratianne',
    1981: 'Elaine Zayak',
    1982: 'Rosalynn Sumners',
    1983: 'Rosalynn Sumners',
    1984: 'Rosalynn Sumners',
    1985: 'Tiffany Chin',
    1986: 'Debi Thomas',
    1987: 'Jill Trenary',
    1988: 'Debi Thomas',
    1989: 'Jill Trenary',
    1990: 'Jill Trenary',
    1991: 'Tonya Harding',
    1992: 'Kristi Yamaguchi',
    1993: 'Nancy Kerrigan',
    1994: 'No champion[a]',
    1995: 'Nicole Bobek',
    1996: 'Michelle Kwan',
    1997: 'Tara Lipinski',
    1998: 'Michelle Kwan',
    1999: 'Michelle Kwan',
    2000: 'Michelle Kwan',
    2001: 'Michelle Kwan',
    2002: 'Michelle Kwan',
    2003: 'Michelle Kwan',
    2004: 'Michelle Kwan',
    2005: 'Michelle Kwan',
    2006: 'Sasha Cohen',
    2007: 'Kimmie Meissner',
    2008: 'Mirai Nagasu',
    2009: 'Alissa Czisny',
    2010: 'Rachael Flatt',
    2011: 'Alissa Czisny',
    2012: 'Ashley Wagner',
    2013: 'Ashley Wagner',
    2014: 'Gracie Gold',
    2015: 'Ashley Wagner',
    2016: 'Gracie Gold',
    2017: 'Karen Chen',
    2018: 'Bradie Tennell',
    2019: 'Alysa Liu',
    2020: 'Alysa Liu',
    2021: 'Bradie Tennell',
    2022: 'Mariah Bell',
    2023: 'Isabeau Levito',
    2024: 'Amber Glenn',
}
jr_women = {
    1918: 'Clara Rotch Frothingham',
    1920: 'Rosaline Dunn',
    1921: 'Beatrix Loughran',
    1922: 'Helen Stantial',
    1923: 'Rosalie Knapp',
    1924: 'Maribel Vinson',
    1925: 'Ada Bauman',
    1926: 'Julia Honan',
    1927: 'Suzanne Davis',
    1928: 'Virginia Badger',
    1929: 'Evelyn Chandler Mapes',
    1930: 'Dr. Hulda Berger',
    1931: 'Margaret Bennett',
    1932: 'Lousie Weigel',
    1933: 'Estelle Weigel',
    1934: 'Valerie Jones',
    1935: 'Polly Blodgett',
    1936: 'Katherine Durbrow',
    1937: 'Joan Tozzer',
    1938: 'Charlotte Walther',
    1939: 'Gretchen Merrill',
    1940: 'Ramona Allen',
    1941: 'Donna Atwood',
    1942: 'Borthody Goos',
    1943: 'Hildegard Balmain',
    1944: 'Madelon Olson',
    1945: 'Eileen Seigh',
    1946: 'Barbara James',
    1947: 'Yvonne Claire Sherman',
    1948: 'Virginia Baxter',
    1949: 'Sonya Klopfer',
    1950: 'Tenley Albright*',
    1951: 'Frances Dorsey',
    1952: 'Carol Heiss',
    1953: 'Patricia Firth',
    1954: 'Catherine Machado',
    1955: 'Nancy Heiss',
    1956: 'Joan Schenke',
    1957: 'Carol Joyce Womek',
    1958: 'Barbara Ann Roles',
    1959: 'Laurence Owen',
    1960: 'Karen Howland',
    1961: 'Lorraine Hanlon',
    1962: 'Christine Haigler',
    1963: 'Albertina Noyes',
    1964: 'Carol Noir',
    1965: 'Sharon Bates',
    1966: 'Janet Lynn',
    1967: 'Julie Lynn Holmes',
    1968: 'Barbara Ray',
    1969: 'Lousie Vaca',
    1970: 'Juli McKinstry',
    1971: 'Melissa Militano',
    1972: 'Wendy Burge',
    1973: 'Laurie Brandel',
    1974: 'Barbara Smith',
    1975: 'Lisa-Marie Allen',
    1976: 'Carly Rugh',
    1977: 'Sandy Lenz',
    1978: 'Jill Sawyer',
    1979: 'Elaine Zayak',
    1980: 'Vikki de Vries',
    1981: 'Jill Frost',
    1982: 'Lorilee Pritchard',
    1983: 'Kathryn Adams',
    1984: 'Allison Oki',
    1985: 'Jill Trenary',
    1986: 'Cindy Bortz',
    1987: 'Jeri Campbell',
    1988: 'Dena Galech',
    1989: 'Kyoko Ina',
    1990: 'Alice Sue Claeys',
    1991: 'Lisa Ervin',
    1992: 'Carolina Song',
    1993: 'Michelle Cho',
    1994: 'Jennifer Karl',
    1995: 'Sydne Vogel',
    1996: 'Shelby Lyons',
    1997: 'Andrea Gardiner',
    1998: 'Sarah Hughes',
    1999: 'Sara Wheat',
    2000: 'Ann Patrice McDonough',
    2001: 'Joan Cristobal',
    2002: 'Louann Donovan',
    2003: 'Erica Archambault',
    2004: 'Kimmie Meissner',
    2005: 'Sandra Jean Rucker',
    2006: 'Megan Hyatt',
    2007: 'Mirai Nagasu',
    2008: 'Alexe Gilles',
    2009: 'DeeDee Leng',
    2010: 'Agnes Zawadzki',
    2011: 'Courtney Hicks',
    2012: 'Gracie Gold',
    2013: 'Polina Edmunds',
    2014: 'Amber Glenn',
    2015: 'Bradie Tennell',
    2016: 'Emily Chan',
    2017: 'Kaitlyn Nguyen',
    2018: 'Alysa Liu',
    2019: 'Gabriella Izzo',
    2020: 'Lindsay Thorngren',
    2021: 'Isabeau Levito',
    2022: 'Clare Seo',
    2023: 'Soho Lee',
}

names = set()
name_tab = defaultdict(lambda: defaultdict(list))
for year, name in sr_women.items():
    names.add(name)
    name_tab[name]['sr'].append(year)
for year, name in jr_women.items():
    names.add(name)
    name_tab[name]['jr'].append(year)

# pp.pprint(name_tab)

result_tab = []
for name, div_tab in name_tab.items():
    sr_vec = sorted(div_tab['sr'])
    jr_vec = sorted(div_tab['jr'])
    if len(sr_vec) and len(jr_vec):
        last_jr = jr_vec[-1]
        first_sr = sr_vec[0]
        diff = first_sr - last_jr
        result_tab.append((name, diff))

result_tab.sort(key=lambda pair: -pair[1])
pp.pprint(result_tab)