# Transpose Given an input text output it transposed. Roughly explained, the transpose of a matrix: ```text ABC DEF ``` is given by: ```text AD BE CF ``` Rows become columns and columns become rows. See . If the input has rows of different lengths, this is to be solved as follows: - Pad to the left with spaces. - Don't pad to the right. Therefore, transposing this matrix: ```text ABC DE ``` results in: ```text AD BE C ``` And transposing: ```text AB DEF ``` results in: ```text AD BE F ``` In general, all characters from the input should also be present in the transposed output. That means that if a column in the input text contains only spaces on its bottom-most row(s), the corresponding output row should contain the spaces in its right-most column(s). ## Exception messages Sometimes it is necessary to raise an exception. When you do this, you should include a meaningful error message to indicate what the source of the error is. This makes your code more readable and helps significantly with debugging. Not every exercise will require you to raise an exception, but for those that do, the tests will only pass if you include a message. To raise a message with an exception, just write it as an argument to the exception type. For example, instead of `raise Exception`, you shold write: ```python raise Exception("Meaningful message indicating the source of the error") ``` ## Submitting Exercises Note that, when trying to submit an exercise, make sure the solution is in the `exercism/python/` directory. For example, if you're submitting `bob.py` for the Bob exercise, the submit command would be something like `exercism submit /python/bob/bob.py`. For more detailed information about running tests, code style and linting, please see the [help page](http://exercism.io/languages/python). ## Source Reddit r/dailyprogrammer challenge #270 [Easy]. [https://www.reddit.com/r/dailyprogrammer/comments/4msu2x/challenge_270_easy_transpose_the_input_text](https://www.reddit.com/r/dailyprogrammer/comments/4msu2x/challenge_270_easy_transpose_the_input_text) ## Submitting Incomplete Solutions It's possible to submit an incomplete solution so you can see how others have completed the exercise.