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transpose_rows

Your mission

Implement transpose_rows, which returns the columns of a text grid as a list of strings.

See it in action

transpose_rows(["cat", "owl"]): ['co', 'aw', 'tl']
transpose_rows(["7", "4", "1"]): ['741']
transpose_rows(["", "", ""]): []

Your checklist

rows holds zero or more strings of printable characters, all of the same length. Each string is one row of the grid, top row first, and each character is one cell, spaces included.
Return a list with one string per column of the grid, leftmost column first.
The string of a column holds its cells from the top row down to the bottom row.
An empty rows, or rows of length 0, give [].
Do not modify rows.

Constraints

Expected file: transpose_rows.py
Allowed functions: None. Write every helper yourself.

Run the tests to grade your code

17 tests

One row gives one-character columns
One column gives one string
Square grid
Grid wider than tall
Grid taller than wide
Two by two grid
One-cell grid
Columns read from the top row down
Spaces are cells like any other
A grid of spaces
Digit cells
Non-ASCII characters are cells too
No rows gives []
One row of length 0 gives []
Several rows of length 0 give []
Larger 6 by 9 grid
rows is left unchanged

Python

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transpose_rows

Your mission

Implement transpose_rows, which returns the columns of a text grid as a list of strings.

See it in action

transpose_rows(["cat", "owl"]): ['co', 'aw', 'tl']
transpose_rows(["7", "4", "1"]): ['741']
transpose_rows(["", "", ""]): []

Your checklist

rows holds zero or more strings of printable characters, all of the same length. Each string is one row of the grid, top row first, and each character is one cell, spaces included.
Return a list with one string per column of the grid, leftmost column first.
The string of a column holds its cells from the top row down to the bottom row.
An empty rows, or rows of length 0, give [].
Do not modify rows.

Constraints

Expected file: transpose_rows.py
Allowed functions: None. Write every helper yourself.

Run the tests to grade your code

17 tests

One row gives one-character columns
One column gives one string
Square grid
Grid wider than tall
Grid taller than wide
Two by two grid
One-cell grid
Columns read from the top row down
Spaces are cells like any other
A grid of spaces
Digit cells
Non-ASCII characters are cells too
No rows gives []
One row of length 0 gives []
Several rows of length 0 give []
Larger 6 by 9 grid
rows is left unchanged

Variables will appear here

Python