In list of numbers, find each pair that equals 100

Yes I know this has no graceful error protection for user input, wanted the example code to focused on problem space.

#!/usr/bin/env python
import random
import sys
X=int(sys.argv[1]) # e.g. enter 100 on the command line
print "In list of numbers, find each pair that equals " + str(X)

myNumbers = []
matched = []
for i in range(1,X):
 myNumbers.append(random.randrange(0,X))

for i in myNumbers:
 A=myNumbers.pop()
 for j in myNumbers:
  if A != False:
   try:
    if ((A+myNumbers[j]) == X):
     B=myNumbers[j]
     del myNumbers[j]
     matched.append([A, B])
     A = False
   except:
    TypeError

for i, j  in enumerate(matched):
 if ((i>0) and (i % 5 == 0)):
  print j
 else:   print j,

print
print "length of remaining unmatched numbers list is " + str(len(myNumbers)) 
print "length of remaining matched numbers list is " + str(len(matched))