Pandas._config.config.optionerror: ‘pattern matched multiple keys’

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pandas._config.config.optionerror: ‘pattern matched multiple keys’

An OptionError in pandas arises when a given configuration option pattern matches multiple keys. This error typically occurs when there is ambiguity in the configuration option names or patterns, making it impossible for pandas to determine which option needs to be set or retrieved.

Let’s understand this error with an example:

import pandas as pd

# Create a DataFrame
df = pd.DataFrame({'A': [1, 2, 3], 'AA': [4, 5, 6], 'BB': [7, 8, 9]})

# Set the option to match multiple keys
pd.set_option('display', 10)

# This will raise an OptionError
df

In the above example, we are trying to set the ‘display’ option to 10. However, pandas raises an OptionError because there are multiple keys that match the given pattern ‘display’ (i.e., ‘display.max_rows’, ‘display.max_columns’, ‘display.width’, etc.).

To resolve this error, you need to provide a more specific or unique configuration option key. For example:

# Set the display.max_rows option to 10
pd.set_option('display.max_rows', 10)

# Now you can display the DataFrame without errors
df

In this modified example, we specifically set the ‘display.max_rows’ option to 10, eliminating ambiguity and resolving the OptionError.

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