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#1
November 7th, 2003, 05:12 PM
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join()
How do i use the string.join class with multydimentional arrays?
Code:
import string matrix = [[1,2,3],[4,5,6],[7,8,9]] join = string.join(matrix) print join
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#2
November 7th, 2003, 10:26 PM
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join only operates on strings
http://www.python.org/doc/current/l...ng-methods.html If you are trying to convert it to display the matrix as a string, try something like this Code:
output = ""
for row in matrix:
for element in row:
output += str(element) + ' '
if len(row) > 0: output = output[:-1]
output += '\n'
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#3
November 8th, 2003, 02:34 AM
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For small lists of data this wouldn't be much of a problem but with HUGE lists this could be slow; because strings in Python are imutable the Python interpreter has to make copies of the strings when consinating them (string + string) and etc.
This should work better: Code:
#!/usr/bin/env python l = [[1,2,3],[4,5,6],[7,8,9]] j = [] for s in l: for e in s: j.append(str(e)) print ''.join(j) it only joins the data and doesnt display it in a matrix style like yogis does but you can do this is say.. one more line by appending a '\n' in there. Mark.
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