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如何将一个熊猫系列转换成 Python 列表?

原文:https://www.geesforgeks.org/如何将熊猫系列转换为 python 列表/

在本文中,我们将讨论如何将熊猫系列转换为 Python 列表及其类型。这可以使用 tolist() 方法来完成。 T3】例 1:

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import pandas as pd

evenNumbers = [2, 4, 6, 8, 10]

evenNumbersDs = pd.Series(evenNumbers)
print("Pandas Series and type")
print(evenNumbersDs)
print(type(evenNumbersDs))

print("\nConvert Pandas Series to Python list")
print(evenNumbersDs.tolist())
print(type(evenNumbersDs.tolist()))

输出:

Pandas series to list

在上面的例子中,我们将熊猫系列数据作为偶数传递。由于没有给出指标,默认 0 为 *例 2:*

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import pandas as pd
import numpy as np

data = np.array(['ant','bat','cat','dog'])
series = pd.Series(data,index=[100,101,102,103])
print(series)
print(type(series))

print("\nConvert Pandas Series to Python list")
print(series.tolist())
print(type(series.tolist()))

*输出:*

Pandas series to list

在上面的例子中,我们将 Panda 系列数据作为 np.array 传递(['ant ',' bat ',' cat ',' dog'])。 指数为[100,101,102,103]

*例 3:*

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# Series from dictionary
import pandas as pd
import numpy as np

marks = {'Maths' : 100., 'Physics' : 90.,
         'Chemistry' : 85.}
series = pd.Series(marks)

print(series)
print(type(series))

print("\nConvert Pandas Series to Python list")
print(series.tolist())
print(type(series.tolist()))

*输出:*

Pandas series to list

*例 4:*

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# Get First 3 student marks and
# convert as list
import pandas as pd
series = pd.Series([100, 90, 80, 90, 85],
                   index=['Student1', 'Student2',
                          'Student3', 'Student4',
                          'Student5'])

# retrieve the first three element
print(series[:3])
print(series[:3].tolist())
print(type(series[:3].tolist()))

*输出:*

Pandas series to list



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