Question

在我运行代码 import pandas as pd

后弹出

  NameError                                 Traceback (most recent call last)
    <ipython-input-3-7dd3504c366f> in <module>
    ----> 1 import pandas as pd


c:\users\user\appdata\local\programs\python\python39\lib\site-packages\pandas\__init__.py in <module>
     49 import pandas.core.config_init
     50 
---> 51 from pandas.core.api import (
     52     # dtype
     53     Int8Dtype,

c:\users\user\appdata\local\programs\python\python39\lib\site-packages\pandas\core\api.py in <module>
     13 

enter code here

     14 from pandas.core.algorithms import factorize, unique, value_counts
---> 15 from pandas.core.arrays import Categorical
     16 from pandas.core.arrays.boolean import BooleanDtype
     17 from pandas.core.arrays.floating import Float32Dtype, Float64Dtype

c:\users\user\appdata\local\programs\python\python39\lib\site-packages\pandas\core\arrays\__init__.py in <module>
      5 )
      6 from pandas.core.arrays.boolean import BooleanArray
----> 7 from pandas.core.arrays.categorical import Categorical
      8 from pandas.core.arrays.datetimes import DatetimeArray
      9 from pandas.core.arrays.floating import FloatingArray

c:\users\user\appdata\local\programs\python\python39\lib\site-packages\pandas\core\arrays\categorical.py in <module>
----> 1 from csv import QUOTE_NONNUMERIC
      2 from functools import partial
      3 import operator
      4 from shutil import get_terminal_size
      5 from typing import Dict, Hashable, List, Sequence, Type, TypeVar, Union, cast

~\OneDrive\Desktop\python\Ardent\csv.py in <module>
   1175   {
   1176    "cell_type": "code",
-> 1177    "execution_count": null,
   1178    "id": "authorized-neighbor",
   1179    "metadata": {},

NameError: name 'null' is not defined

**

Answer 1

您似乎为 csv.py 中的字典中的键分配了 null 值。

null 是变量吗？

如果您想分配一个 "empty"/"null" value in python，您应该使用 None。 null 不是 Python 中的类型。

Answer 2

你可以这样试试：

import json
mydict = json.dumps(data)

无论您要转换为 dict 的任何数据，请确保在打印或处理之前它应该是 json.dumps() 否则 null 将被视为变量。

在 jupyter notebook 中导入熊猫时遇到问题

2 个答案: