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Showing content from https://github.com/pandas-dev/pandas/issues/44354 below:

add suffixes argument to DataFrame.compare · Issue #44354 · pandas-dev/pandas · GitHub

It would be convenient to choose other suffixes in DataFrame.compare than self, other

Add argument suffixes so users can specify them.

None

df = pd.DataFrame(
    {"col1": ["a", "b", "c"], "col2": [1.0, 2.0, np.nan], "col3": [1.0, 2.0, 3.0]},
    columns=["col1", "col2", "col3"],
)
df2 = df.copy()
df2.loc[0, "col1"] = "c"
df2.loc[2, "col3"] = np.nan
diff = df.compare(df2, suffixes=["left", "right"])
print(diff)

  col1       col3      
  left right left right
0    a     c  NaN   NaN
2  NaN   NaN  3.0   NaN

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