[issue27947] Trailing backslash in raw string format causes EOL

2016-09-02 Thread cfgbd 

cfgbd added the comment:

Thanks for comment. Here I got my answer from string docs.

Even in a raw literal, quotes can be escaped with a backslash, but the 
backslash remains in the result; for example, r"\"" is a valid string literal 
consisting of two characters: a backslash and a double quote; r"\" is not a 
valid string literal (even a raw string cannot end in an odd number of 
backslashes). Specifically, a raw literal cannot end in a single backslash 
(since the backslash would escape the following quote character). Note also 
that a single backslash followed by a newline is interpreted as those two 
characters as part of the literal, not as a line continuation.

--

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[issue27947] Bug of python interpreter

2016-09-02 Thread cfgbd 

New submission from cfgbd:

In python shell, I typed words and got result as follows. It seems that the use 
of 'r' before a literal string may cause an error that the an odd '\' at the 
end of literal string blocked the quote.

>>> rb'abc\\\'
SyntaxError: EOL while scanning string literal
>>> rb'abc\\'
b'abc'
>>> br'abc\\\ '
b'abc\\ '
>>> br'abc\\\'
SyntaxError: EOL while scanning string literal
>>> r'\\'
''
>>> r'\\\'
SyntaxError: EOL while scanning string literal

--
messages: 274282
nosy: cfgbd
priority: normal
severity: normal
status: open
title: Bug of python interpreter
type: behavior
versions: Python 3.4

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