python: how to avoid spaces ?

Sergei Steshenko · 10-01-2010, 01:48 PM

Quote:

Originally Posted by ghostdog74

You are hopelessly misguided. These are not different ways to use a syntax. Not like Perl. So many for loop syntax, so many open() syntax. etc

Of course, not.

In http://www.linuxquestions.org/questi...6/#post4114764 I see:

Code:

for i in range (1, 10):

; in http://www.linuxquestions.org/questi...6/#post4115001 I see:

Code:

for (f1, f2, f3,...fn) in cur:

- quite a different syntax.

marozsas · 10-01-2010, 02:11 PM

Quote:

Originally Posted by GrapefruiTgirl

I got the hint from here: http://bytes.com/topic/python/answer...t-ending-comma

YES ! Thanks Celine ! Your reference has the answer !

Code:

import sys

x= "123.45"
print "row title",
for i in range (1, 10):
  sys.stdout.softspace = 0
  print ";%s" % x,
print

GrapefruiTgirl · 10-01-2010, 02:14 PM

Cool, I'm glad that you found something useful there.

Now if I'm not mistaken, without running that code, it looks to me like it will print a semi-colon at the very beginning of the output. Is this correct? And if so, is that OK?

marozsas · 10-01-2010, 03:40 PM

Yes, it is correct. it will print:

Code:

row title;123,45;123,45;123,45;123,45;123,45;123,45;123,45;123,45;123,45

and this, when loaded in a spreadsheet will draw the "row title" in the column A, the first data in the column B and so on....

ghostdog74 · 10-01-2010, 06:32 PM

Quote:

Originally Posted by Sergei Steshenko

Of course, not.

Code:

for i in range (1, 10):

for (f1, f2, f3,...fn) in cur:[/CODE]

- quite a different syntax.

That syntax is

Code:

for [target list]  in  [expression list]

This is consistent throughout.

Code:

#iterate a list
for i in range(10)

# iterate a file
for n,line in enumerate(open("file"))

There are no other inbuilt syntax for a for loop in Python. you do not see foreach, for var (@something), for(i=0;i<MAX;i++) etc syntaxes as in Perl.

ghostdog74 · 10-01-2010, 06:35 PM

Quote:

Originally Posted by marozsas

I can't use the way you suggested because "x" is not a constant. Just to clarify:
...
(you see now why I reduced the problem in the first place ? If I am using a database, or how the "x" is evaluated it is not important - just "print x," printing a extra space is the problem.)

so why don't you show a sample of the sql output, and how you want to format it?