Teaching EMRS PGT Mock Test 2023 Programming With Python Python Libraries

How do you rename a column in a DataFrame?

1
df.rename(columns={"old_name": "new_name"})
2
df.columns["old_name"].rename("new_name")
3
df.columns.rename("old_name", "new_name")
4
df.columns['old_name'].replace("new_name")
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