String double quoted fatal problem

[cliffdover88]

BPO	4164
Nosy	@amauryfa

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2008-10-21.21:05:19.495>
created_at = <Date 2008-10-21.20:10:24.689>
labels = ['invalid', 'build', 'library']
title = 'String double quoted fatal problem'
updated_at = <Date 2008-10-21.21:05:19.440>
user = 'https://bugs.python.org/cliffdover88'

bugs.python.org fields:

activity = <Date 2008-10-21.21:05:19.440>
actor = 'amaury.forgeotdarc'
assignee = 'none'
closed = True
closed_date = <Date 2008-10-21.21:05:19.495>
closer = 'amaury.forgeotdarc'
components = ['Library (Lib)']
creation = <Date 2008-10-21.20:10:24.689>
creator = 'cliffdover88'
dependencies = []
files = []
hgrepos = []
issue_num = 4164
keywords = []
message_count = 2.0
messages = ['75038', '75047']
nosy_count = 2.0
nosy_names = ['amaury.forgeotdarc', 'cliffdover88']
pr_nums = []
priority = 'normal'
resolution = 'not a bug'
stage = None
status = 'closed'
superseder = None
type = 'compile error'
url = 'https://bugs.python.org/issue4164'
versions = ['Python 2.6']

[cliffdover88]

Hi

I have a problem with python 2.6, when i try to process strings with
triple-quoted string literal i get an error:

a='a''a' #1 double quoted Ok

a='a''''a' # 2 Ok

a= 'a''''''a' # 3 doble quoted -- SyntaxError: EOF while scanning
triple-quoted string literal

a= 'a''''''''a' # 4 ok

a='a''''''''''a' # 5 same error impair doble quoted

a='a''''''''''''a' # 6 Ok...............

a... #7 error..................

[amauryfa]

All your samples explain easily if you consider that two adjacent string
literals are joined together. (You seem to consider that "double quote"
is a way to insert a quote character. It's not; Python is not Pascal or
SQL)

Your first two examples become:
a='a''a' two adjacent strings == 'aa'
a='a''''a' three adjacent strings ('a' + '' + 'a') == 'aa'

The third is an error:
a='a''''''a' one string ('a') followed by the beginning of a "triple
quoted string" (''') which content starts with the characters (''a') but
does not have a matching (''') to finish the string, hence the Syntax
error.

... and so on. Please have a look at http://docs.python.org/reference/lexical_analysis.html#string-literals