Reference library

Lists & loops

Iterate, transform, and combine sequences with readable loop patterns.

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Lists & loops easy

How to Transpose a Matrix in Python (List of Lists)

Swap rows and columns of a 2D list using nested loops to produce a transposed matrix.

matrix transpose 2d-list
Python 
def transpose(matrix):
    # Number of rows and columns in the original matrix
    rows = len(matrix)
    cols = len(matrix[0]) if rows > 0 else 0
    
    # Create a new matrix with dimensions swapped
    result = []
    for j in range(cols):
        new_row = []
        for i in range(rows):
            new_row.appe…
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