回答編集履歴
1
コード修正
answer
CHANGED
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@@ -13,26 +13,22 @@
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"昭和47年12月",]
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})
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-
def
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+
def conv(s):
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m = re.search(r'(\d+)-(\d+)', s)
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-
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# 年月を抽出
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return int(m.group(1)), int(m.group(2))
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m = re.search(r'平成(\d+)年(\d+)月', s)
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if m:
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return int(m.group(1))+1988, int(m.group(2))
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-
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rules = [(r'(\d+)-(\d+)', 0), (r'平成(\d+)年(\d+)月', 1988), (r'昭和(\d+)年(\d+)月', 1925)]
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if m:
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return int(m.group(1))+1925, int(m.group(2))
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-
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y, m = None, None
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for exp, offset in rules:
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ret = re.search(exp, s)
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if ret:
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y = int(ret.group(1)) + offset
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m = int(ret.group(2))
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break
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def conv(s):
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y,m = conv_ym(s)
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s = ''
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if y and m:
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s = f'{y}年{m}月'
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return s
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-
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df['西暦年月'] = df['基準日'].apply(conv)
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print(df)
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# 基準日 西暦年月
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@@ -40,4 +36,6 @@
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#1 2018-05-11 2018年5月
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#2 平成30年09月 2018年9月
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#3 昭和47年12月 1972年12月
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+
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40
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+
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```
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