Checkpoint 8.9.1.
Q-3: The
repr function takes an object as an argument and returns what type of representation of the object?
Section 8.9 Debugging
When you are reading and writing files, you might run into problems with whitespace. These errors can be hard to debug because spaces, tabs, and newlines are normally invisible:
The built-in function
repr can help. It takes any object as an argument and returns a string representation of the object. For strings, it represents whitespace characters with backslash sequences:This can be helpful for debugging.
One other problem you might run into is that different systems use different characters to indicate the end of a line. Some systems use a newline, represented
\n. Others use a return character, represented \r. Some use both. If you move files between different systems, these inconsistencies might cause problems.Checkpoint 8.9.2.
- \n
- This is the symbol for a newline.
- \t
- This is the symbol for a tab.
- \r
- This is the symbol for the return character.
- \'
- This is the symbol for the ' character in a string.
Q-4: Which of the following symbols create newlines, or returns, in files? Select all that apply.
For most systems, there are applications to convert from one format to another. You can find them (and read more about this issue) at wikipedia.org/wiki/Newline 1 . Or, of course, you could write one yourself.
wikipedia.org/wiki/Newline
