Python string formatting

[Kolmogorov]

Hi,

I'm trying to do a nicely formatted table for the following (simple) program:


# chaos.py

def main():
# Introduction
print "This program illustrates a chaotic function."
print

# Get user input
x,y = input("Enter two numbers between 0 and 1 (a,b): ")
n = input("Enter the number of iterations: ")
print

# Create table labels
print "%5s\t%.2f\t%.2f" % ("index",x,y)
print "-" * 35

# Create the table
for i in range(1,n + 1):
x = 3.9 * x * (1 - x)
y = 3.9 * y * (1 - y)
print "%5d\t%.6f\t%.6f" % (i,x,y)

print

main()

* This is actually a problem from the book : "Python Programming: An introduction to computer science" by John Zelle (chapter 4, problem 12).

I want the labels be centered with the values of the table...is there any suggestions ?

Thanks ;)

Kolmogorov

[Wybiral]

Can you use [ code ] tags so I can read it better?

If you're trying to center a string with spaces as padding:


>>> "Hello world".center(25)
' Hello world '

[ghostdog74]

you can use rjust, ljust.

[Def13b]

Another option is to give the elements of your string conversion a width.

Used before the '.'


print "%5s\t%8.2f\t%8.2f" % ("index",x,y)
^ ^

adjusted to suit your needs obviously, not sure how well this would work if your table width changes though.