Python3 - 使用熊猫将 csv 转换为 json

Posted 2023-03-11

【中文标题】Python3 - 使用熊猫将 csv 转换为 json

【英文标题】：Python3 - convert csv to json using pandas

【发布时间】：2017-06-04 06:27:30

【问题描述】：

我有一个包含 5 列的 .csv 文件，但我只需要 json 文件来包含其中的 3 个，我该怎么做？

csv 文件：

Ncode   Ocode   name    a     b     c 
  1      1.1     1x     1a    1b    1c
  2      2.2     2x     2a    2b    2c
  3      3.3     3x     3a    3b    3c

Json 输出：

"1.1":["a":"1a","b":"1b","c":"1c"],"2.2":["a":"2a","b":"2b","c":"2c"]

【问题讨论】：

"1.1":"a":"1a","b":"1b","c":"1c","2.2":"a":"2a","b":"2b","c":"2c" 想要这个吗？

@MYGz，是的，但是需要有一个 [ ] 包围 Ocode 的条目......所以你的建议是这样的； "1.1":"a":"1a","b":"1b","c":"1c","2.2":"a":"2a","b":"2b"‌​,"c":"2c"，我需要的是"1.1":["a":"1a","b":"1b","c":"1c"],"2.2":["a":"2a","b":"2b"‌​,"c":"2c"] 谢谢

【参考方案1】：

txt = """Ncode   Ocode   name    a     b     c 
  1      1.1     1x     1a    1b    1c
  2      2.2     2x     2a    2b    2c
  3      3.3     3x     3a    3b    3c
"""

df = pd.read_csv(StringIO(txt), delim_whitespace=True)


json.dumps(
    ':0.2f'.format(r.Ocode): ['a': r.a, 'b': r.b, 'c': r.c]
     for r in df.itertuples()
)

'"2.20": ["a": "2a", "b": "2b", "c": "2c"], "3.30": ["a": "3a", "b": "3b", "c": "3c"], "1.10": ["a": "1a", "b": "1b", "c": "1c"]'