Ошибка ValueError: setting an array element with a sequence

Question

У меня есть проблема при использовании библиотек Pandas и Matlotlib

import pandas as pd
import matplotlib.pyplot as plt

dfr = pd.read_csv('./troinik2.csv', low_memory=False, delimiter=';', decimal=',')
df = pd.DataFrame({'x': dfr[['ModelingTime']],
                   'y': dfr[['P']]}, index=[0])
df=df.astype(float)
df.plot()
plt.show()

вот код ошибки:

TypeError: float() argument must be a string or a number, not 'tuple'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "C:/Users/kiber/PycharmProjects/untitled14/ppp.py", line 7, in <module>
    df=df.astype(float)
  File "C:\Users\kiber\AppData\Local\Programs\Python\Python37\lib\site-packages\pandas\core\generic.py", line 5698, in astype
    new_data = self._data.astype(dtype=dtype, copy=copy, errors=errors)
  File "C:\Users\kiber\AppData\Local\Programs\Python\Python37\lib\site-packages\pandas\core\internals\managers.py", line 582, in astype
    return self.apply("astype", dtype=dtype, copy=copy, errors=errors)
  File "C:\Users\kiber\AppData\Local\Programs\Python\Python37\lib\site-packages\pandas\core\internals\managers.py", line 442, in apply
    applied = getattr(b, f)(**kwargs)
  File "C:\Users\kiber\AppData\Local\Programs\Python\Python37\lib\site-packages\pandas\core\internals\blocks.py", line 625, in astype
    values = astype_nansafe(vals1d, dtype, copy=True)
  File "C:\Users\kiber\AppData\Local\Programs\Python\Python37\lib\site-packages\pandas\core\dtypes\cast.py", line 897, in astype_nansafe
    return arr.astype(dtype, copy=True)
ValueError: setting an array element with a sequence.

Answer 1

Подозреваю проблема в том как вы создаете df - в качестве значений столбцов x и y вы указываете DataFrame вместо столбцов.

Попробуйте так:

import pandas as pd
import matplotlib.pyplot as plt

df = pd.read_csv(r"D:\download\troinik2.csv", sep=";", decimal=",", index_col=0)

df.plot()
plt.show()

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Ошибка ValueError: setting an array element with a sequence

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