A Concatenate Two Pandas DataFrames Vertically?
Code Explanation:
● Data Creation: Two DataFrames (df1 and df2) are created, but only df1 is used.
● Concatenation: pd.concat([df1, df1], axis=0) combines df1 with itself vertically (row-wise).
● Index: The original indices are retained. So, you get repeated indices (0,1,0,1).
● Output Display: The new DataFrame df4 is printed, showing duplicated rows from df1.
Program:
import pandas as pd
df1 = pd.DataFrame({'ID': [1, 2], 'Name': ['Alice', 'Bob']})
df2 = pd.DataFrame({'ID': [1, 2], 'Score': [90, 95]})
df4 = pd.concat([df1, df1], axis=0)
print(df4)
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