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Python - Create a pandas series from an array

By IncludeHelp Last updated : January 11, 2024

Problem statement

Given a NumPy array, write Python code to create a Pandas series from it.

Creating a series from an array

To create a pandas series from an array, you can use the pandas.Series() method and pass a NumPy array in it. To create an array, use the numpy.array() method.

Python program to create a series from an array

# importing modules
import numpy as np
import pandas as pd

# creating an array
arr = np.array([10, 20, 30, 40])

# creating series from an array
series = pd.Series(arr)

# printing series
print(series)

Output

The output of the above program is:

0    10
1    20
2    30
3    40
dtype: int64

Creating a series from an array with indexes

You can also specify the indexes during creating a series from an array. To assign indexes to a series, pass the indexes to the index attribute inside pandas.Series() method.

Python program to create a series from an array with indexes

# importing modules
import numpy as np
import pandas as pd

# creating an array
arr = np.array([10, 20, 30, 40])

# creating series from an array
series = pd.Series(arr, index=[100, 101, 102, 103])

# printing series
print(series)

Output

The output of the above program is:

100    10
101    20
102    30
103    40
dtype: int64

Creating a series of different data type from an array

You can also specify the data type of the output series while creating a series from an array. To specify the data type of the output series, pass the data type with dtype attribute inside pandas.Series() method.

Python program to create a series of different data type from an array

# importing modules
import numpy as np
import pandas as pd

# creating an array
arr = np.array([10, 20, 30, 40])

# creating series from an array
series = pd.Series(arr, dtype="float")

# printing series
print(series)

Output

The output of the above program is:

0    10.0
1    20.0
2    30.0
3    40.0
dtype: float64

Giving a name to the series created from an array

You can also set a name to the output series by specifying the series name with the name attribute inside pandas.Series() method.

Python program to create a series from an array and give a name to it

# importing modules
import numpy as np
import pandas as pd

# creating an array
arr = np.array([10, 20, 30, 40])

# creating series from an array
series = pd.Series(arr, dtype="float", name="my_series")

# printing series
print(series)

Output

The output of the above program is:

0    10.0
1    20.0
2    30.0
3    40.0
Name: my_series, dtype: float64

To understand the above programs, you should have the basic knowledge of the following Python topics:

• Python Variables
• Python Data Types
• Python print() Method
• Python NumPy Tutorial

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