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我正在尝试从我在夏威夷的 Covid-19 上抓取的新闻和政府公告文本中提取日期。我在一个虚拟数据集上运行了一个示例程序，并找到了为页面上的每个数字生成的日期。当我使用“strict=True”时，根本没有日期。这是 4 行文件的结果。

import datefinder
with open("c:/users/Lnitz/documents/ige2.txt") as file:
    for line in file:
        matches = datefinder.find_dates(line, source=True)
        #print(line)
        for match in matches:
                print(match, 'xxx', line)

结果：

(datetime.datetime(2020, 11, 19, 0, 0), 'on Nov 19, 2020') xxx Posted on Nov 19, 2020 in COVID-98 News Releases, Latest News, Press 14 Releases  

(datetime.datetime(1998, 10, 24, 0, 0), '98') xxx Posted on Nov 19, 2020 in COVID-98 News Releases, Latest News, Press 14 Releases  

(datetime.datetime(2021, 10, 14, 0, 0), '14') xxx Posted on Nov 19, 2020 in COVID-98 News Releases, Latest News, Press 14 Releases  

(datetime.datetime(2021, 10, 19, 0, 0), '19') xxx Pre-travel COVID-19 testing results must be in hand prior to 3/23/1945 departure for Hawaiʻi 

(datetime.datetime(1945, 3, 23, 0, 0), '3/23/1945') xxx Pre-travel COVID-19 testing results must be in hand prior to 3/23/1945 departure for Hawaiʻi 

(datetime.datetime(1878, 3, 5, 0, 0), 'Mar 5,1878') xxx Air Canada and WestJet Mar 5,1878 partnering 72 with State of Hawaiʻi for Canadian15 pre-travel 78 testing

(datetime.datetime(1972, 10, 24, 0, 0), '72') xxx Air Canada and WestJet Mar 5,1878 partnering 72 with State of Hawaiʻi for Canadian15 pre-travel 78 testing

(datetime.datetime(1978, 10, 24, 0, 0), '78') xxx Air Canada and WestJet Mar 5,1878 partnering 72 with State of Hawaiʻi for Canadian15 pre-travel 78 testing
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1 回答 1

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如果您设置 datefinder 的输出包含源字符串source=True，那么后处理呢？例如，对于完整描述的日期 (y/m/d)，您至少需要 6 个字符（包括分隔符）和 4 个数字：

import datefinder

s = """Posted on Nov 19, 2020 in COVID-98 News Releases, Latest News, Press 14 Releases
Pre-travel COVID-19 testing results must be in hand prior to 3/23/1945 departure for Hawaiʻi
Air Canada and WestJet Mar 5,1878 partnering 72 with State of Hawaiʻi for Canadian15 pre-travel 78 testing"""

for l in s.split('\n'):
    matches = datefinder.find_dates(l, strict=False, source=True)
    for m in matches:
        if (sum(c.isdigit() for c in m[1]) >= 4) and (len(m[1]) >= 6):
            print(f"{l} ->\n{m}\n")

# Posted on Nov 19, 2020 in COVID-98 News Releases, Latest News, Press 14 Releases ->
# (datetime.datetime(2020, 11, 19, 0, 0), 'on Nov 19, 2020')

# Pre-travel COVID-19 testing results must be in hand prior to 3/23/1945 departure for Hawaiʻi ->
# (datetime.datetime(1945, 3, 23, 0, 0), '3/23/1945')

# Air Canada and WestJet Mar 5,1878 partnering 72 with State of Hawaiʻi for Canadian15 pre-travel 78 testing ->
# (datetime.datetime(1878, 3, 5, 0, 0), 'Mar 5,1878')
于 2021-10-27T05:47:09.927 回答