[Tutor] Converting a numerical variable into a string variable

[Sander Sweers]

On Thu, Feb 12, 2009 at 21:06, Andres Sanchez <telmo_andres at yahoo.com> wrote:
> Please, give me a hand with this. Say I have a vector defined as
> x=[1,2,3,4,...,9]. I need to write string variables with the names
> G1BF...G9BF. Thus, the first string variable would be 'G'+'1'+'BF', being
> the number 1 equal to x[0]. Now, using a for loop, I want to do something
> like: y[i]='G'+x[i-1]+'BF' , to create my string variables. Yes, the problem
> is that I am mixing numerical and string variables and Python reports an
> error when I try to do this. So, the question is: how do I do to convert the
> numerical variable x[0]=1 into a string variable '1', so I can do my
> 'G'+'1'+BF' thing?

>>> x = 100
>>> x
100
>>> str(x)
'100'

You can use str() to convert the numbers to strings. To print what you
are looking for do something like this.

>>> x = [x for x in range(1,10)]
>>> x
[1, 2, 3, 4, 5, 6, 7, 8, 9]

>>> for var in x:
	print 'G' + str(var) + 'BF'

	
G1BF
G2BF
G3BF
G4BF
G5BF
G6BF
G7BF
G8BF
G9BF

Or:

>>> for var in x:
	print 'G%sBF' % var

	
G1BF
G2BF
G3BF
G4BF
G5BF
G6BF
G7BF
G8BF
G9BF

> By the way, 'G'+'x[0]'+'BF' reports 'Gx[0]BF'  :)

Correct, 'x[0]' is a string not the number you are looking for. See
above on how you can do this.

Greets
Sander

PS: personally I like the second one better :-)