Sorting numbers in each row of a table – Python code

Reading – sorting – writing to a file (Python code)

# SortByRow.py
import numpy as np

inf = "infile.txt"      # input file name
outf = "outfile.txt"    # output file name
de = "\t"               #delimiter used in infile.txt (tab)
de2 = ", "              #delimiter used in outfile.txt 

# read the first row as dummy row for use with vstack
f = open(inf, "rt")
str1 = f.readline().strip()
if str1 != '':
   str2 = str1.split(de)
   row = np.array(str2)
   irow = row.astype(int)
   imat = irow
   omat = irow 
f.close()

f = open(inf, "rt")
while True:
    str1 = f.readline().strip()
    if str1 == '':
        break
    else:
        str2 = str1.split(de)
        row = np.array(str2)
        irow = row.astype(int)
        imat = np.vstack((imat,irow))   
f.close()
    
imat = imat[1:,:] #remove dummy row

'''
sorting each row in imat in ascending order
results stored in omat
'''
for x in imat:
    omat = np.vstack((omat,np.sort(x)))

omat = omat[1:,:] # remove dummy row

# write sorted row to a new output file, numbers separated by a comma 

f2 = open(outf,"w")
for x in omat:
    for a in x[0:-1]:
       f2.write("%s" % a+de2)
    f2.write("%s\n" % x[-1])
f2.close()