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Print the Length of DataFrames at a Specified Location

Explore how to print the length of pandas DataFrames at specified locations by using different slicing methods like loc, iloc, and slice notation. Understand half-open and closed range slicing, and learn to avoid common off-by-one errors in pandas indexing.

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Try it yourself

Try executing the code below to see the result.

Python 3.8
import pandas as pd
df = pd.DataFrame([
  [1, 1, 1],
  [2, 2, 2],
  [3, 3, 3],
  [4, 4, 4],
  [5, 5, 5],
])
print(len(df.loc[1:3]))

Explanation

Slices in Python are half-open rangesA half-open range includes the first element but excludes the last one.. We get values from ...