User:Contribution/Ups & downs notation in Python: Difference between revisions

(3 intermediate revisions by the same user not shown)

Line 2:

def upsdowns(degree: int, steps_per_octave: int, steps_per_fifth: int, steps_per_degree: int = 1):

sharpness = 7 * steps_per_fifth - 4 * steps_per_octave

POS_ALTS, NEG_ALTS = ({(-~~1) ** (~~i ~~+ 1~~) * i for i in range(1, 6)}, {(-1) ** i * i for i in range(1, 6)})

POS_ALTS, NEG_ALTS = ({(i if i % 2 else -i) for i in range(1, 6)}, {(-i if i % 2 else i) for i in range(1, 6)})

naturals = []

for a in range(-5, 6):

pos = (a * steps_per_fifth) % steps_per_octave

oadj = -1 if (pos < steps_per_octave ~~/ 2~~ and a in POS_ALTS) else (1 if (pos > steps_per_octave ~~/ 2~~ and a in NEG_ALTS) else 0)

oadj = -1 if (2 * pos < steps_per_octave and a in POS_ALTS) else (1 if (2 * pos > steps_per_octave and a in NEG_ALTS) else 0)

naturals.append([pos, [0, a, oadj]])

naturals.sort(key=lambda x: (x[0], -x[1][1], x[1][2]))

Line 50:

return f"{letter}{int((fi * 4) % 7 + 1)}"

def octave_str(o~~: int~~) ~~-> str~~:

def octave_str(o):

return "" if o == 0 else f" {'+' if o > 0 else '-'}{abs(o)}"

@@ Line 2: / Line 2: @@
 def upsdowns(degree: int, steps_per_octave: int, steps_per_fifth: int, steps_per_degree: int = 1):
      sharpness = 7 * steps_per_fifth - 4 * steps_per_octave
-     POS_ALTS, NEG_ALTS = ({(-1) ** (i + 1) * i for i in range(1, 6)}, {(-1) ** i * i for i in range(1, 6)})
+     POS_ALTS, NEG_ALTS = ({(i if i % 2 else -i) for i in range(1, 6)}, {(-i if i % 2 else i) for i in range(1, 6)})
      naturals = []
      for a in range(-5, 6):
          pos = (a * steps_per_fifth) % steps_per_octave
-         oadj = -1 if (pos < steps_per_octave / 2 and a in POS_ALTS) else (1 if (pos > steps_per_octave / 2 and a in NEG_ALTS) else 0)
+         oadj = -1 if (2 * pos < steps_per_octave and a in POS_ALTS) else (1 if (2 * pos > steps_per_octave and a in NEG_ALTS) else 0)
          naturals.append([pos, [0, a, oadj]])
      naturals.sort(key=lambda x: (x[0], -x[1][1], x[1][2]))
@@ Line 50: / Line 50: @@
          return f"{letter}{int((fi * 4) % 7 + 1)}"
-     def octave_str(o: int) -> str:
+     def octave_str(o):
          return "" if o == 0 else f" {'+' if o > 0 else '-'}{abs(o)}"