Help with Printing Matrix Grid

[okcomputer24]

I am wanting to print a matrix grid which is derived from a list of lists. The grid should look as follows:

Col 0 Col 1 Col 2

Row 0 1 2 3
Row 1 4 5 6
Row 2 7 8 9

However, I can't figure out how to print the lists without the [ ] around them. My code so far is as shown:

lol = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]

for i in range(0,len(lol )):
print " "*5 +"Col", i,
print "\n"
for i in range(0,len(lol )):
print "Row",i,lol[i]

Any suggestions or advice would be greatly appreciated. Thanks!

[elcron]

I am wanting to print a matrix grid which is derived from a list of lists. The grid should look as follows:

Col 0 Col 1 Col 2

Row 0 1 2 3
Row 1 4 5 6
Row 2 7 8 9

However, I can't figure out how to print the lists without the [ ] around them. My code so far is as shown:
[code=python]
lol = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]

for i in range(0,len(lol )):
print " "*5 +"Col", i,
print "\n"
for i in range(0,len(lol )):
print "Row",i,lol[i]
[/code]
Any suggestions or advice would be greatly appreciated. Thanks!

You can access nested lists the same you could try something like li[i][j] but the following is more scalable
[code=python]
if True:
lol = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]

print "Columns %s"%( " ".join([str(j) for j in range(len(lol[0])]) )
for i in range(0,len(lol )):
print " Row %s: %s"%(i, " ".join( [str(j) for j in lol[i]]))
[/code]

[bvdet]

The following uses a neat function that I picked up on this site from a tip by Bartonc. I haven't seen Bartonc in a while.[code=Python]
def columnize(word, width, align='Left'):
nSpaces = width - len(word)
if nSpaces < 0:
nSpaces = 0
if align == 'Left':
return word + (" " * nSpaces)
if align == 'Right':
return (" " * nSpaces) + word
return (" " * (nSpaces/2)) + word + (" " * (nSpaces-nSpaces/2))

num = int(raw_input(' Gimme a starting int: '))
n = int(raw_input(' Matrix size: '))

listofLists = [[i+j for i in range(num,num+n )] for j in range(0,n*n,n)]

column = 7

print
print '%s%s' % (columnize('Row/Column |', column*2, 'Right'), \
'|'.join([columnize('Col %d' % i, column, 'Center') \
for i in range(len(listo fLists[0]))]))
spaces = sum([column+1 for i in range(len(listo fLists[0]))])+column*2
print '='*spaces
for i, item in enumerate(listo fLists):
print '%s%s' % (columnize('Row %d |' % i, column*2, 'Right'), \
'|'.join([columnize(str(n um), column, 'Center') \
for num in item]))[/code]

Output:
[code=Python]
>>>
Row/Column | Col 0 | Col 1 | Col 2
=============== =============== ========
Row 0 | 1 | 2 | 3
Row 1 | 4 | 5 | 6
Row 2 | 7 | 8 | 9 [/code]

[okcomputer24]

Being a new user of Python I never considered joining a for loop. Thanks for your help.