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Pandas First Steps
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Pandas First Steps

Pandas First Steps

1. The Very First Steps
What is pandas? SeriesCreating a SeriesDataFrameSeries QuizCreating a DataFrame QuizAdding a New ColumnInserting a New ColumnDeleting a Row/Column Matching the FunctionsWorking with ColumnsExtracting Columns Quiziloc BasicsUsing iloc
2. Reading Files in Pandas
CSV FilesTXT FilesWorking with Files QuizAccessing the Columns
3. Analyzing the Data
Viewing the DataHead QuizHead and Tail QuizInformation on the DataColumn Names and Data TypesFinding Null ValuesIdentifying Null Values QuizDropping Null ValuesFilling Null ValuesNull Values QuizDescribing the DataCalculating Descriptive Statisticsmax() and min()Statistical Operations Quizsum() and count()Unique Values

bookFinding Null Values

Dataframes often contain missing values, represented as None or np.NaN. When working with dataframes, it's essential to identify these missing values. For this purpose, pandas offers specific methods.

The first of these is isna(), which returns a boolean dataframe. In this context, a True value indicates a missing value within the dataframe, while a False value suggests the value is present.

For clarity, let's review an example. Run the code provided to see a dataframe filled with True and False values, offering a clearer understanding.


              
123456789

            
import pandas as pd
import numpy as np

dataset = {'animal': [np.NaN, 'Dog', np.NaN, 'Cat','Parrot', None],
'name': ['Dolly', None, 'Erin', 'Kelly', None, 'Odie']}
animal = pd.DataFrame(dataset)
# Find missing values
missing_value = animal.isna()
print(missing_value)
copy

The second method is isnull(). It behaves identically to the previous one, with no discernible difference between them. Let's examine its application. Running the accompanying code will show if the resulting DataFrame matches the one from the prior example.


              
123456789

            
import pandas as pd
import numpy as np

dataset = {'animal': [np.NaN, 'Dog', np.NaN, 'Cat','Parrot', None],
'name': ['Dolly', None, 'Erin', 'Kelly', None, 'Odie']}
animal = pd.DataFrame(dataset)
# Find missing values
missing_value = animal.isnull()
print(missing_value)
copy

Tarefa

Your objective is to pinpoint the missing values in a given dataframe named data_frame.

Switch to desktopMude para o desktop para praticar no mundo realContinue de onde você está usando uma das opções abaixo
Tudo estava claro?

Como podemos melhorá-lo?

Obrigado pelo seu feedback!

Seção 3. Capítulo 6
toggle bottom row

bookFinding Null Values

Dataframes often contain missing values, represented as None or np.NaN. When working with dataframes, it's essential to identify these missing values. For this purpose, pandas offers specific methods.

The first of these is isna(), which returns a boolean dataframe. In this context, a True value indicates a missing value within the dataframe, while a False value suggests the value is present.

For clarity, let's review an example. Run the code provided to see a dataframe filled with True and False values, offering a clearer understanding.


              
123456789

            
import pandas as pd
import numpy as np

dataset = {'animal': [np.NaN, 'Dog', np.NaN, 'Cat','Parrot', None],
'name': ['Dolly', None, 'Erin', 'Kelly', None, 'Odie']}
animal = pd.DataFrame(dataset)
# Find missing values
missing_value = animal.isna()
print(missing_value)
copy

The second method is isnull(). It behaves identically to the previous one, with no discernible difference between them. Let's examine its application. Running the accompanying code will show if the resulting DataFrame matches the one from the prior example.


              
123456789

            
import pandas as pd
import numpy as np

dataset = {'animal': [np.NaN, 'Dog', np.NaN, 'Cat','Parrot', None],
'name': ['Dolly', None, 'Erin', 'Kelly', None, 'Odie']}
animal = pd.DataFrame(dataset)
# Find missing values
missing_value = animal.isnull()
print(missing_value)
copy

Tarefa

Your objective is to pinpoint the missing values in a given dataframe named data_frame.

Switch to desktopMude para o desktop para praticar no mundo realContinue de onde você está usando uma das opções abaixo
Tudo estava claro?

Como podemos melhorá-lo?

Obrigado pelo seu feedback!

Seção 3. Capítulo 6
toggle bottom row

bookFinding Null Values

Dataframes often contain missing values, represented as None or np.NaN. When working with dataframes, it's essential to identify these missing values. For this purpose, pandas offers specific methods.

The first of these is isna(), which returns a boolean dataframe. In this context, a True value indicates a missing value within the dataframe, while a False value suggests the value is present.

For clarity, let's review an example. Run the code provided to see a dataframe filled with True and False values, offering a clearer understanding.


              
123456789

            
import pandas as pd
import numpy as np

dataset = {'animal': [np.NaN, 'Dog', np.NaN, 'Cat','Parrot', None],
'name': ['Dolly', None, 'Erin', 'Kelly', None, 'Odie']}
animal = pd.DataFrame(dataset)
# Find missing values
missing_value = animal.isna()
print(missing_value)
copy

The second method is isnull(). It behaves identically to the previous one, with no discernible difference between them. Let's examine its application. Running the accompanying code will show if the resulting DataFrame matches the one from the prior example.


              
123456789

            
import pandas as pd
import numpy as np

dataset = {'animal': [np.NaN, 'Dog', np.NaN, 'Cat','Parrot', None],
'name': ['Dolly', None, 'Erin', 'Kelly', None, 'Odie']}
animal = pd.DataFrame(dataset)
# Find missing values
missing_value = animal.isnull()
print(missing_value)
copy

Tarefa

Your objective is to pinpoint the missing values in a given dataframe named data_frame.

Switch to desktopMude para o desktop para praticar no mundo realContinue de onde você está usando uma das opções abaixo
Tudo estava claro?

Como podemos melhorá-lo?

Obrigado pelo seu feedback!

Dataframes often contain missing values, represented as None or np.NaN. When working with dataframes, it's essential to identify these missing values. For this purpose, pandas offers specific methods.

The first of these is isna(), which returns a boolean dataframe. In this context, a True value indicates a missing value within the dataframe, while a False value suggests the value is present.

For clarity, let's review an example. Run the code provided to see a dataframe filled with True and False values, offering a clearer understanding.


              
123456789

            
import pandas as pd
import numpy as np

dataset = {'animal': [np.NaN, 'Dog', np.NaN, 'Cat','Parrot', None],
'name': ['Dolly', None, 'Erin', 'Kelly', None, 'Odie']}
animal = pd.DataFrame(dataset)
# Find missing values
missing_value = animal.isna()
print(missing_value)
copy

The second method is isnull(). It behaves identically to the previous one, with no discernible difference between them. Let's examine its application. Running the accompanying code will show if the resulting DataFrame matches the one from the prior example.


              
123456789

            
import pandas as pd
import numpy as np

dataset = {'animal': [np.NaN, 'Dog', np.NaN, 'Cat','Parrot', None],
'name': ['Dolly', None, 'Erin', 'Kelly', None, 'Odie']}
animal = pd.DataFrame(dataset)
# Find missing values
missing_value = animal.isnull()
print(missing_value)
copy

Tarefa

Your objective is to pinpoint the missing values in a given dataframe named data_frame.

Switch to desktopMude para o desktop para praticar no mundo realContinue de onde você está usando uma das opções abaixo
Seção 3. Capítulo 6
Switch to desktopMude para o desktop para praticar no mundo realContinue de onde você está usando uma das opções abaixo
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