明治元年から平成二十四年までの毎年の日数を出力するプログラム

wareki.py

#!/usr/bin/env python
# -*- coding: utf_8 -*-

def yearToWareki (year):
	r"""
		result: tuple [('元号', 年, 日数), ('元号', 年, 日数)]
		        ２つ目の要素はほぼないが、変わり目の時にある
	"""
	# 明治元年: 1868
	# 明治45年: 1912 (~7/29)
	# 大正元年: 1912 (7/30~)
	# 大正15年: 1926 (~12/24)
	# 昭和元年: 1926 (12/25~)
	# 昭和64年: 1989 (~1/7)
	# 平成元年: 1989 (1/8~)
	y = 365
	if is_uru(year):
		y += 1
	
	def gan (_y, _start, _gou):
		toshi = u"元" if _start == _y else str(_y - _start + 1)
		return u"%s%s年" % (_gou, toshi)

	if 1868 == year:
		return [(u"明治元年", year, y)]
	elif 1869 <= year <= 1911:
		return [(gan(year, 1868, u"明治"), year, y)]
	elif year == 1912:
		return [(u'明治45年', year, 205), (u'大正元年', year, 365-205)]
	elif 1913 <= year <= 1925:
		return [(gan(year, 1912, u"大正"), year, y)]
	elif year == 1926:
		return [(u"大正15年", year, 365 - 7), (u"昭和元年", year, 7)]
	elif 1927 <= year <= 1988:
		return [(gan(year, 1926, u"昭和"), year, y)]
	elif year == 1989:
		return [(u"昭和64年", year, 8), (u"平成元年", year, 365 - 8)]
	elif 1990 <= year:
		return [(gan(year, 1989, u"平成"), year, y)]

def is_uru (year):
	if year % 4 == 0:
		if year % 400 == 0:
			return True
		elif year % 100 == 0:
			return False
		return True
	return False

def out_year (year):
	y = 365
	if is_uru(year):
		y += 1
	print "%d is `%d'" % (year, y)

if __name__ == "__main__":
	buff = []
	for y in range(1868, 2015):
		buff = yearToWareki(y)
		for b in buff:
			print "%s[%d] => %d" % b