Typeerror: merge() missing 1 required positional argument: ‘right’

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TypeError: merge() missing 1 required positional argument: ‘right’

A TypeError occurs when the merge() function is called without providing the required positional argument 'right'. This means that the merge() function expects to be passed two DataFrames, where the second one is denoted as 'right'.

Example:

# Import pandas library
import pandas as pd

# Create two DataFrames
df1 = pd.DataFrame({'A': [1, 2, 3],
                    'B': [4, 5, 6]})

df2 = pd.DataFrame({'C': [7, 8, 9],
                    'D': [10, 11, 12]})

# Merge the DataFrames without providing 'right' argument
result = pd.merge(df1)  # TypeError occurs here

# The line above will raise the following error message:
# TypeError: merge() missing 1 required positional argument: 'right'

In the example above, we try to merge df1 and df2 using the merge() function. However, we forget to pass the right DataFrame as a parameter to the merge() function, resulting in a TypeError.

To resolve this error, make sure to pass both DataFrames to the merge() function:

# Import pandas library
import pandas as pd

# Create two DataFrames
df1 = pd.DataFrame({'A': [1, 2, 3],
                    'B': [4, 5, 6]})

df2 = pd.DataFrame({'C': [7, 8, 9],
                    'D': [10, 11, 12]})

# Merge the DataFrames with 'right' argument
result = pd.merge(df1, df2)  # Now no TypeError occurs

By passing both df1 and df2 as arguments to the merge() function, the TypeError will be resolved and the merging of the DataFrames will be performed successfully.

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