.

notes.py

@@ -30,8 +30,9 @@ def note2freq(name):
     return A*rel**(fullnum + 3)
 
 if __name__ == '__main__':
+    test_fmt = '{:3} gave {: 9.2f} Hz\nexpected {: 9.2f} Hz'
     def test(name, expected):
-        print('{:3} gave {: 9.2f} Hz\nexpected {: 9.2f} Hz'.format(name, note2freq(name), expected))
+        print(test_fmt.format(name, note2freq(name), expected))
 
     test('C2' ,  65.41)
     test('Ab4', 415.30)

strings.py

@@ -16,8 +16,8 @@ def uw2tension(uw, freq, SL):
 def tension2uw(t, freq, SL):
     return (t*uw_const)/(2*SL*freq)**2
 
-outfmt = '{:<8} at {:> 5.2f} lbs ({:>+4.2f})'
-finalfmt = 'total:     {:>7.2f} lbs ({:>+5.2f})'
+outfmt = '{:<8} at {:> 5.2f} lb ({:>+4.2f})'
+finalfmt = 'total:     {:>7.2f} lb ({:>+5.2f})'
 def print_ideal_stock(strings, scale_length=25.512):
     SL = scale_length
     total_tension = 0