如何在Python中提取‘Pickup Location’等特定关键词后的内容？

你之前的代码仅截取了External Identifier:之后的全部文本，未限制到该行结束，导致输出包含后续所有无关内容，不符合预期。

下面提供两种实用的提取方法：

方法1：逐行遍历提取 #

将文本按行拆分，逐个匹配目标关键词，提取冒号后的内容：

text = """Pickup Location: ccirc:USD-COPLEY :USD Copley Circulation
External Identifier: 580978
Requested Bar code: 31822044004612
Barcode: 
Title: Liberalism and the postcolony : thinking the state in 20th-century Philippines /
Library: Geisel Library
Location: Books Floor5
Call Number: DS685 .C57 2017
Author: Claudio, Lisandro E.,
UC San Diego Library Contact Us"""

# 指定要提取的关键词
target_keys = ['Pickup Location', 'External Identifier', 'Location']
extracted = {}

# 按行处理文本
for line in text.split('\n'):
    line = line.strip()
    if not line:
        continue
    # 遍历关键词匹配
    for key in target_keys:
        if line.startswith(f"{key}:"):
            # 分割冒号并提取值，去除多余空格
            value = line.split(':', 1)[1].strip()
            extracted[key] = value
            break

# 打印结果
for k, v in extracted.items():
    print(f"{k}: {v}")

方法2：正则表达式匹配 #

用正则精准匹配每行的关键词与对应值：

import re

text = """Pickup Location: ccirc:USD-COPLEY :USD Copley Circulation
External Identifier: 580978
Requested Bar code: 31822044004612
Barcode: 
Title: Liberalism and the postcolony : thinking the state in 20th-century Philippines /
Library: Geisel Library
Location: Books Floor5
Call Number: DS685 .C57 2017
Author: Claudio, Lisandro E.,
UC San Diego Library Contact Us"""

# 正则匹配模式，匹配目标关键词及其后的值
pattern = r'^(Pickup Location|External Identifier|Location):\s*(.*)$'
matches = re.findall(pattern, text, re.MULTILINE)

# 整理成字典
extracted = {key: value.strip() for key, value in matches}

# 打印结果
for k, v in extracted.items():
    print(f"{k}: {v}")

两种方法都会输出：

• Pickup Location: ccirc:USD-COPLEY :USD Copley Circulation
• External Identifier: 580978
• Location: Books Floor5

内容的提问来源于stack exchange，提问作者Kaung Min Khant