将 for 循环中的多行合并到一个列表中答案

【问题标题】：Merge multiple lines from for loop into one list将 for 循环中的多行合并到一个列表中
【发布时间】：2019-06-27 17:11:11
【问题描述】：

我的脚本读取并解析了一个 JSON 文件：

{
"messages": 
[
    {"timestamp": "123456789", "timestampIso": "2019-06-26 09:51:00", "agentId": "2001-100001", "skillId": "2001-20000", "agentText": "That customer was great"},
    {"timestamp": "123456789", "timestampIso": "2019-06-26 09:55:00", "agentId": "2001-100001", "skillId": "2001-20001", "agentText": "That customer was stupid\nI hope they don't phone back"},
    {"timestamp": "123456789", "timestampIso": "2019-06-26 09:57:00", "agentId": "2001-100001", "skillId": "2001-20002", "agentText": "Line number 3"},
    {"timestamp": "123456789", "timestampIso": "2019-06-26 09:59:00", "agentId": "2001-100001", "skillId": "2001-20003", "agentText": ""}
]
}

我有一个 Python 脚本，它去除了“agentText”，for 循环逐行打印出每个对象：

import json

with open('20190626-101200-text-messages.json') as f:
  data = json.load(f)

for message in data['messages']:
    splittext= message['agentText'].strip().replace('\n',' ').replace('\r',' ')
    if len(splittext) > 0:
       print(splittext)

这给了我：

That customer was great
That customer was stupid I hope they don't phone back
Line number 3

我需要将这些单独的行附加在一起，所以它只是显示：

That customer was great That customer was stupid I hope they don't phone back Line number 3

所以我可以对它应用一些停用词/nltk。如何做到这一点？

【问题讨论】：

标签： python json python-3.x list

【解决方案1】：

您可以将所有行连接到单个字符串变量：

res = ""
for message in data['messages']:
    splittext= message['agentText'].strip().replace('\n',' ').replace('\r',' ')
    if len(splittext)>0:
       res += splittext + " "

或者在列表的帮助下使用字符串方法：

res = []
for message in data['messages']:
    splittext= message['agentText'].strip().replace('\n',' ').replace('\r',' ')
    if len(splittext)>0:
       res.append(splittext)
print(" ".join(res))

【讨论】：

【解决方案2】：

对str.join 和str.splitlines 使用理解

例如：

data = {
"messages": 
[
    {"timestamp": "123456789", "timestampIso": "2019-06-26 09:51:00", "agentId": "2001-100001", "skillId": "2001-20000", "agentText": "That customer was great"},
    {"timestamp": "123456789", "timestampIso": "2019-06-26 09:55:00", "agentId": "2001-100001", "skillId": "2001-20001", "agentText": "That customer was stupid\nI hope they don't phone back"},
    {"timestamp": "123456789", "timestampIso": "2019-06-26 09:57:00", "agentId": "2001-100001", "skillId": "2001-20002", "agentText": "Line number 3"},
    {"timestamp": "123456789", "timestampIso": "2019-06-26 09:59:00", "agentId": "2001-100001", "skillId": "2001-20003", "agentText": ""}
]
}

print(" ".join(j for msg in data["messages"] for j in msg["agentText"].splitlines()))

输出：

That customer was great That customer was stupid I hope they don't phone back Line number 3

【讨论】：