一、通过正则表达式提取
```python
import re
def extract_date(id_card):
pattern = r'^(\d{4})(\d{2})(\d{2})'
match = re.match(pattern, id_card)
if match:
year = up(1)
month = up(2)
day = up(3)
return year, month, day
else:
return None
date = extract_date(id_card)
if date:
print(f"年：{date[0]}，月：{date[1]}，日：{date[2]}")
else:
```
二、通过字符串切片提取
正则匹配年月日```python
def extract_date(id_card):
if len(id_card) >= 14:
year = id_card[:4]
month = id_card[4:6]
day = id_card[6:8]
return year, month, day
else:
return None
date = extract_date(id_card)
if date:
print(f"年：{date[0]}，月：{date[1]}，日：{date[2]}")
else:
```
三、通过第三方库提取
```python
from id_validator import validator
def extract_date(id_card):
if validator.is_validated(id_card):
year = id_card[6:10]
month = id_card[10:12]
day = id_card[12:14]
return year, month, day
else:
return None
date = extract_date(id_card)
if date:
print(f"年：{date[0]}，月：{date[1]}，日：{date[2]}")
else:
```
四、利用机器学习模型提取

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