[Tutor] making a table

Alan G alan.gauld at freenet.co.uk
Fri Sep 9 12:26:36 CEST 2005

>I would like to construct a table for my program but it does not seem 
>to be
> coming out evenly. Could someone please let me know what to do so 
> that
> everything will work out correctly?

The best way to build a table is to use a format string with every
field width specified explicitly. Thus in your example:

def main(min,max,step):
    """This program prints a table of Celsius temperatures
       and their Fahrenheit equivalents """
    fmt = "%4s    %4s"
    print fmt % ('C','F')
    for i in range(min, max, step):
        fahrenheit = (9.0/5.0) * i + 32
        print fmt % (i,farenheit)


By applying the same format to the headings you ensure consistency and
by specifying the widths you get guaranteed text line-up. If you want
to print an HTML table you only need to add the tags to the format
string (although in that case you might want a different format
for the header)

I also parameterised the function so you can specify the range of
temperatures and the step size just for fun. :-)

Alan G 

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