COMPUTER SCIENCE AND ENGINEERING
DATA STRUCTURES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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df ____ grades.column
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df ____ grades.columns
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df ____ grades ____ columns
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df ____ grades.columnnames
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Detailed explanation-1: -Use list(df) to Get Column Names from DataFrame. Use list(df) to get the column header from pandas DataFrame. You can also use list(df. columns) to get column names.
Detailed explanation-2: -A header necessarily stores the names or headings for each of the columns. It basically helps the user to identify the role of the respective column in the data frame. The top row containing column names is called the header row of the data frame.
Detailed explanation-3: -DataFrame-head() function The head() function is used to get the first n rows. This function returns the first n rows for the object based on position. It is useful for quickly testing if your object has the right type of data in it.
Detailed explanation-4: -Count the number of rows and columns of Dataframe using len() function. The len() function returns the length rows of the Dataframe, we can filter a number of columns using the df. columns to get the count of columns.