I have a misunderstanding of the use of r
in print function to remove escape characters. Very basic example of what is not working for me below and one of several efforts I have made to remedy the situation:
print(r"I am trying to keep the backslash in the link using r \www.home.com\")
SyntaxError: unterminated string literal (detected at line 19)
This is the error that is presented to me when I try to print to console. I have attempted different ways to end the string literal. Can someone help me to understand what is happening here and the logic.
I have attempted various fixes like:
print("\\www.home.com\\")
This does work, but in my head using r
before the ""
should work too.
Example of what works:
print(r"This string would print normally if I remove the last back slash \www.home.com")
"... I have a misunderstanding of the use of r in print function to remove escape characters. ..."
This is called a raw string.
Here are some excerpts, from the Python Documentation.
The Python Language Reference – 2.4.1. String and Bytes literals
"... Both string and bytes literals may optionally be prefixed with a letter
'r'
or'R'
; such strings are called raw strings and treat backslashes as literal characters. ..."
The Python Tutorial – 3.1.2. Text
"... If you don’t want characters prefaced by
\
to be interpreted as special characters, you can use raw strings by adding anr
before the first quote ...
... There is one subtle aspect to raw strings: a raw string may not end in an odd number of\
characters; see the FAQ entry for more information and workarounds. ..."
The reason your code doesn't work is because Python is interpreting the escape sequence as a literal value.
The \
is essentially capturing the subsequent character.
Thus, the ending \"
is considered literal.
Here is a similar question and answer.
Why can't Python's raw string literals end with a single backslash?
In this case, just use a regular string literal.
print("I am trying to keep the backslash in the link using r \www.home.com\\")