python - Attempting to transpose a matrix using python3 -

i know missing pieces produce matrix cannot seem find mistakes start.

i have 3 tasks.

1) show empty matrix like. 2) show original matrix(4x3). 3) transpose matrix 3x4.

import sys scanner import *  def creatematrix(size):     if size == 0: return []     else:         return [0] + creatematrix(size -1)  def printgrid(gridlist):     row in gridlist:         print (str(row)+"\n")  def nrows(g):     return len(g)  def ncols(g):     return len(g[0])  def printmatrix(g):     in range(0,nrows,1):         j in range(0,ncols,1):             print("the original matrix is:",g[i][j])         print('')     print('')  def printmatrixtranspose(g):     j in range(0,ncols,1):         in range(0,nrows,1):             print("the transposed matrix is:",g[i][j])         print('')     print('')  def readinput(filename,grid):     s = scanner(filename)     r = s.readtoken()     while r != "":         r = int(r)         c = s.readint()         v = s.readint()         grid[r][c]=v         r = s.readtoken()     s.close()  def main():     grid = creatematrix(5)     in range(4):         grid[i] = creatematrix(5)     readinput(sys.argv[1],grid)     printmatrixtranspose(g)  main() 

i keep getting error, not sure how fix it.

  traceback (most recent call last):   file "transpose.py", line 51, in <module>     main()   file "transpose.py", line 48, in main     readinput(sys.argv[1],grid)   file "transpose.py", line 37, in readinput     r = int(r) typeerror: int() argument must string or number, not 'method'   

if managing matrix list of lists, transposing quite simplying using list argument zip() function, so:

x = [[1,2,3],[4,5,6],[7,8,9],[10,11,12]]  print x print map(list,zip(*x)) 

we map() list() function across output of zip zip returns list of tuples, not list of lists.

the above prints:

[[1, 2, 3], [4, 5, 6], [7, 8, 9], [10, 11, 12]] [[1, 4, 7, 10], [2, 5, 8, 11], [3, 6, 9, 12]] 

edit: error suggests code you've added doesn't match running. check file saved, , verify there brackets () after each call readtoken.