From 9e2b17a6b9f48bfeefe752b21afd97d1d5f5353c Mon Sep 17 00:00:00 2001
From: Markus Elfring <elfring@users.sourceforge.net>
Date: Wed, 3 Nov 2021 21:05:45 +0100
Subject: [PATCH] Issue #85: Convert 12 statements to the usage of augmented
 assignments

Augmented assignment statements became available with Python 2.
https://docs.python.org/3/whatsnew/2.0.html#augmented-assignment

Thus improve 12 source code places accordingly.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---
 mingus/core/chords.py                        | 4 ++--
 mingus/core/intervals.py                     | 4 ++--
 mingus/core/progressions.py                  | 2 +-
 mingus/extra/fft.py                          | 4 ++--
 mingus/midi/midi_track.py                    | 2 +-
 mingus_examples/pygame-piano/pygame-piano.py | 4 ++--
 scripts/api_doc_generator.py                 | 4 ++--
 7 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/mingus/core/chords.py b/mingus/core/chords.py
index 62d6fbf5..5f204574 100644
--- a/mingus/core/chords.py
+++ b/mingus/core/chords.py
@@ -1051,7 +1051,7 @@ def add_result(short, poly=False):
 
         # Recognizing polychords
         if tries == 1 and not no_polychords:
-            polychords = polychords + determine_polychords(seventh, shorthand)
+            polychords += determine_polychords(seventh, shorthand)
 
         # Recognizing sevenths
         for triad in triads:
@@ -1333,7 +1333,7 @@ def determine_polychords(chord, shorthand=False):
                     polychords.append("%s|%s" % (chord1, chord2))
     if shorthand:
         for p in polychords:
-            p = p + " polychord"
+            p += " polychord"
     return polychords
 
 
diff --git a/mingus/core/intervals.py b/mingus/core/intervals.py
index 41920969..35b8ad06 100644
--- a/mingus/core/intervals.py
+++ b/mingus/core/intervals.py
@@ -292,10 +292,10 @@ def augment_or_diminish_until_the_interval_is_right(note1, note2, interval):
     # These are some checks to see if we have generated too much #'s or too much
     # b's. In these cases we need to convert #'s to b's and vice versa.
     if val > 6:
-        val = val % 12
+        val %= 12
         val = -12 + val
     elif val < -6:
-        val = val % -12
+        val %= -12
         val = 12 + val
 
     # Rebuild the note
diff --git a/mingus/core/progressions.py b/mingus/core/progressions.py
index b1137550..8ab9d8fc 100644
--- a/mingus/core/progressions.py
+++ b/mingus/core/progressions.py
@@ -245,7 +245,7 @@ def tuple_to_string(prog_tuple):
     if acc > 6:
         acc = 0 - acc % 6
     elif acc < -6:
-        acc = acc % 6
+        acc %= 6
     while acc < 0:
         roman = "b" + roman
         acc += 1
diff --git a/mingus/extra/fft.py b/mingus/extra/fft.py
index 5e785424..ed024460 100644
--- a/mingus/extra/fft.py
+++ b/mingus/extra/fft.py
@@ -102,9 +102,9 @@ def find_frequencies(data, freq=44100, bits=16):
 
     # Scale by the length (n) and square the value to get the amplitude
     p = [(abs(x) / float(n)) ** 2 * 2 for x in p[0:uniquePts]]
-    p[0] = p[0] / 2
+    p[0] /= 2
     if n % 2 == 0:
-        p[-1] = p[-1] / 2
+        p[-1] /= 2
 
     # Generate the frequencies and zip with the amplitudes
     s = freq / float(n)
diff --git a/mingus/midi/midi_track.py b/mingus/midi/midi_track.py
index f3fa6900..6d8392c2 100644
--- a/mingus/midi/midi_track.py
+++ b/mingus/midi/midi_track.py
@@ -281,5 +281,5 @@ def int_to_varbyte(self, value):
 
         # Set the first bit on every one but the last bit.
         for i in range(len(bytes) - 1):
-            bytes[i] = bytes[i] | 0x80
+            bytes[i] |= 0x80
         return pack("%sB" % len(bytes), *bytes)
diff --git a/mingus_examples/pygame-piano/pygame-piano.py b/mingus_examples/pygame-piano/pygame-piano.py
index d4019d36..1538ffab 100755
--- a/mingus_examples/pygame-piano/pygame-piano.py
+++ b/mingus_examples/pygame-piano/pygame-piano.py
@@ -124,7 +124,7 @@ def play_note(note):
         # Getting the x coordinate of a white key can be done automatically
 
         w = WHITE_KEYS.index(note.name) * white_key_width
-        w = w + octave_offset
+        w += octave_offset
 
         # Add a list containing the x coordinate, the tick at the current time
         # and of course the note itself to playing_w
@@ -145,7 +145,7 @@ def play_note(note):
             w = 151
         else:
             w = 187
-        w = w + octave_offset
+        w += octave_offset
         playing_b.append([w, tick, note])
 
     # To find out what sort of chord is being played we have to look at both the
diff --git a/scripts/api_doc_generator.py b/scripts/api_doc_generator.py
index e02b350d..248e97ee 100755
--- a/scripts/api_doc_generator.py
+++ b/scripts/api_doc_generator.py
@@ -157,11 +157,11 @@ def generate_callable_wikidocs(self, module_string, element_string, evaled, is_c
                 self.classes.append(docs)
         elif _is_class(type(evaled)):
             self.classes.append('\n.. class:: ' + element_string + '\n\n')
-            module_string = module_string + "." + element_string
+            module_string += "." + element_string
             self.process_element_recursively(module_string, evaled, True)
         elif hasattr(evaled, '__module__') and evaled.__module__ is not None and evaled.__module__.startswith(module_string):
             self.classes.append('\n.. class:: ' + element_string + '\n\n')
-            module_string = module_string + "." + element_string
+            module_string += "." + element_string
             self.process_element_recursively(module_string, evaled, True)
         else:
             pass