[newbie] problem with data (different behaviour between batch and interactive use)

[Cousin Stanley]

Jean Dupont wrote:

> I have some data which is presented 
> in the following format to me :
>
> +3.874693E-01,+9.999889E-03,+9.910000E+37,+1.876595E+04,+3.994000E+04
>
> I'm only interested in the first two fields i.e.
>
> +3.874693E-01,+9.999889E-03
> .... 

  The following program will read lines
  of comma-separated data from a text file 
  and add each line as a row in a list of lists .... 

  The first two items in each row
  could be accessed by their indexes .... 

# --------------------------------------------------

#!/usr/bin/env python

fsource = open( 'edata.txt' )

ltarget = [ ]

for this_line in fsource : 

    this_list = this_line.strip().split( ',' )

    that_list = [ float( x ) for x in this_list ]

    ltarget.append( that_list ) 


for this_row in ltarget : 

    print '  %e' % this_row[ 0 ] 
    print '  %e' % this_row[ 1 ]
    print

fsource.close()


# -----------------------------------------------------
# 
# edata.txt

+3.874693E01,+9.999889E03,+9.910000E+37,+1.876595E+04,+3.994000E+04
1e01,2e02,3e03,4e04,5e05
5e-05,4e-04,3e-03,2e-02,1e-01


-- 
Stanley C. Kitching
Human Being
Phoenix, Arizona