Python | Pandas Series.notnull()

Pandas series is a One-dimensional ndarray with axis labels. The labels need not be unique but must be a hashable type. The object supports both integer- and label-based indexing and provides a host of methods for performing operations involving the index.

Pandas Series.notnull() function Detect existing (non-missing) values. This function return a boolean object having the size same as the object, indicating if the values are missing values or not. Non-missing values get mapped to True. Characters such as empty strings ” or numpy.inf are not considered NA values (unless pandas.options.mode.use_inf_as_na = True is set). NA values, such as None or numpy.NaN, get mapped to False values.

Syntax: Series.notnull()

Parameter : None

Returns : Series



Example #1: Use Series.notnull() function to detect all the non-missing values in the given series object.

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# importing pandas as pd
import pandas as pd
  
# Creating the Series
sr = pd.Series([10, 25, 3, 11, 24, 6])
  
# Create the Index
index_ = ['Coca Cola', 'Sprite', 'Coke', 'Fanta', 'Dew', 'ThumbsUp']
  
# set the index
sr.index = index_
  
# Print the series
print(sr)

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Output :

Now we will use Series.notnull() function to detect the non-missing values in the series object.

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# detect non-missing value
result = sr.notnull()
  
# Print the result
print(result)

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Output :

As we can see in the output, the Series.notnull() function has returned a boolean object. True indicates that the corresponding value is not missing. False value indicates that the value is missing. All the values are True in this series as there is no missing values.

Example #2: Use Series.notnull() function to detect all the non-missing values in the given series object.



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# importing pandas as pd
import pandas as pd
  
# Creating the Series
sr = pd.Series([19.5, 16.8, None, 22.78, None, 20.124, None, 18.1002, None])
  
# Print the series
print(sr)

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Output :

Now we will use Series.notnull() function to detect the non-missing values in the series object.

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# detect non-missing value
result = sr.notnull()
  
# Print the result
print(result)

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Output :

As we can see in the output, the Series.notnull() function has returned a boolean object. True indicates that the corresponding value is not missing. False value indicates that the value is missing.

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