backslash in python
In python a backslash is used a an escape character, if you want to
include a tab, newline, quote or any unicode character, you must use a
backslash.
''' - quote
'"' - double quote
'n' - newline
't' - tab
'r' - carriage return
'\' - backslash
'u...' - unicode character (replace ... with the corresponding 4-digit number)
'b' - backspace
'f' - form feed
'ooo...' octal value (replace ...)
'x..' hexadecimal value (replace .. with two characters)