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Learn Viewing the Data | Analyzing the Data
Pandas First Steps

bookViewing the Data

To view the first few rows of a dataset, use the head() method. This method accepts an integer argument that specifies how many rows to display (by default, it shows the first 5 rows). Display the first 10 rows of the dataset:

df = pd.read_csv('file.csv')
# Extracting the first 10 rows
first_lines = df.head(10)

To see the last few rows of a DataFrame, use the tail() method. It works the same way as the head() method:

df = pd.read_csv('file.csv')
# Extracting the last 10 rows
last_lines = df.tail(10)

Another useful method for exploring DataFrames is sample(). This method fetches random records from a DataFrame. By default, it retrieves a single random record unless specified otherwise.

df = pd.read_csv('file.csv')
# Extracting 10 random rows
random_lines = df.sample(10)
Task

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You are given a DataFrame named wine_data.

  • Extract the first 10 rows from this DataFrame and store the result in the first_lines variable.
  • Retrieve the last 15 rows from this DataFrame and store the result in the last_lines variable.
  • Select a random sample of 12 rows from this DataFrame and store the result in the random_rows variable.

Solution

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SectionΒ 3. ChapterΒ 1
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bookViewing the Data

Swipe to show menu

To view the first few rows of a dataset, use the head() method. This method accepts an integer argument that specifies how many rows to display (by default, it shows the first 5 rows). Display the first 10 rows of the dataset:

df = pd.read_csv('file.csv')
# Extracting the first 10 rows
first_lines = df.head(10)

To see the last few rows of a DataFrame, use the tail() method. It works the same way as the head() method:

df = pd.read_csv('file.csv')
# Extracting the last 10 rows
last_lines = df.tail(10)

Another useful method for exploring DataFrames is sample(). This method fetches random records from a DataFrame. By default, it retrieves a single random record unless specified otherwise.

df = pd.read_csv('file.csv')
# Extracting 10 random rows
random_lines = df.sample(10)
Task

Swipe to start coding

You are given a DataFrame named wine_data.

  • Extract the first 10 rows from this DataFrame and store the result in the first_lines variable.
  • Retrieve the last 15 rows from this DataFrame and store the result in the last_lines variable.
  • Select a random sample of 12 rows from this DataFrame and store the result in the random_rows variable.

Solution

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Everything was clear?

How can we improve it?

Thanks for your feedback!

SectionΒ 3. ChapterΒ 1
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