Anita Kean wrote:
1) Everywhere in the old and new documentation, the
string of characters "::=" is used in "explaining" things - but
I can nowhere find any stated meaning of this string.
Read Reference manual introductin notation:
The descriptions of lexical analysis and syntax use a modified BNF
grammar notation. This uses the following style of definition:
name ::= lc_letter (lc_letter | "_")*
lc_letter ::= "a"..."z"
The first line says that a name is an lc_letter followed by a sequence
of zero or more lc_letters and underscores. An lc_letter in turn is any
of the single characters 'a' through 'z'. (This rule is actually adhered
to for the names defined in lexical and grammar rules in this document.)
...
I'm guessing something like "if and only if" is implicated here?
yes
But for example, if I import the sys module and perform the following three
commands,
print sys.path
sys.path.__str__()
str(sys.path)
the first two give me the python path, and the last reports an error:
str(sys.path)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/lib/python2.5/locale.py", line 244, in str
return format("%.12g", val)
File "/usr/lib/python2.5/locale.py", line 147, in format
formatted = percent % value
TypeError: float argument required
What is it I'm not understanding here?
You should include the data that gives you such puzzling output ;-).
What did print sys.path produce?
Just typing sys.path at >>> should have the same effect as str(sys.path).
--
http://mail.python.org/mailman/listinfo/python-list
