Pandas - Stack and Unstack
• Stack converts column labels into row index levels (wide to long), while unstack does the reverse (long to wide), making them essential for reshaping hierarchical data structures
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How to Stack and Unstack in Pandas
Pandas provides two complementary methods for reshaping data: stack() and unstack(). These operations pivot data between ’long’ and ‘wide’ formats by moving index levels between the row and…