golden hour

/opt/saltstack/salt/lib/python3.10

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__future__.py	5.03 KB
__phello__.foo.py	64 B
__pycache__	-
_aix_support.py	3.19 KB
_bootsubprocess.py	2.61 KB
_collections_abc.py	31.53 KB
_compat_pickle.py	8.54 KB
_compression.py	5.55 KB
_markupbase.py	14.31 KB
_osx_support.py	21.28 KB
_py_abc.py	6.04 KB
_pydecimal.py	223.32 KB
_pyio.py	92.25 KB
_sitebuiltins.py	3.05 KB
_strptime.py	24.68 KB
_sysconfigdata__linux_x86_64-linux-gnu.py	31.51 KB
_threading_local.py	7.05 KB
_weakrefset.py	5.78 KB
abc.py	6.37 KB
aifc.py	31.84 KB
antigravity.py	500 B
argparse.py	96.23 KB
ast.py	58.5 KB
asynchat.py	11.25 KB
asyncio	-
asyncore.py	19.79 KB
base64.py	20.36 KB
bdb.py	31.64 KB
binhex.py	14.44 KB
bisect.py	3.06 KB
bz2.py	11.57 KB
cProfile.py	6.2 KB
calendar.py	24 KB
cgi.py	33.37 KB
cgitb.py	11.81 KB
chunk.py	5.31 KB
cmd.py	14.51 KB
code.py	10.37 KB
codecs.py	35.85 KB
codeop.py	5.48 KB
collections	-
colorsys.py	3.92 KB
compileall.py	19.78 KB
concurrent	-
config-3.10-x86_64-linux-gnu	-
configparser.py	53.33 KB
contextlib.py	25.28 KB
contextvars.py	129 B
copy.py	8.48 KB
copyreg.py	7.25 KB
crypt.py	3.76 KB
csv.py	15.65 KB
ctypes	-
curses	-
dataclasses.py	55.07 KB
datetime.py	86.02 KB
dbm	-
decimal.py	320 B
difflib.py	81.36 KB
dis.py	19.55 KB
distutils	-
doctest.py	102.68 KB
email	-
encodings	-
ensurepip	-
enum.py	38.9 KB
filecmp.py	9.94 KB
fileinput.py	16.06 KB
fnmatch.py	6.56 KB
fractions.py	27.58 KB
ftplib.py	34.66 KB
functools.py	37.18 KB
genericpath.py	4.86 KB
getopt.py	7.31 KB
getpass.py	5.85 KB
gettext.py	26.63 KB
glob.py	7.7 KB
graphlib.py	9.35 KB
gzip.py	21.34 KB
hashlib.py	9.99 KB
heapq.py	22.34 KB
hmac.py	7.54 KB
html	-
http	-
imaplib.py	53.58 KB
imghdr.py	3.72 KB
imp.py	10.34 KB
importlib	-
inspect.py	121.46 KB
io.py	4.1 KB
ipaddress.py	72.97 KB
json	-
keyword.py	1.04 KB
lib-dynload	-
lib2to3	-
linecache.py	5.56 KB
locale.py	76.29 KB
logging	-
lzma.py	12.97 KB
mailbox.py	76.95 KB
mailcap.py	8.9 KB
mimetypes.py	22.01 KB
modulefinder.py	23.83 KB
multiprocessing	-
netrc.py	5.61 KB
nntplib.py	40.06 KB
ntpath.py	28.79 KB
nturl2path.py	2.82 KB
numbers.py	10.11 KB
opcode.py	5.76 KB
operator.py	10.5 KB
optparse.py	58.95 KB
os.py	38.63 KB
pathlib.py	48.41 KB
pdb.py	61.74 KB
pickle.py	63.43 KB
pickletools.py	91.29 KB
pipes.py	8.71 KB
pkgutil.py	24 KB
platform.py	41.04 KB
plistlib.py	27.69 KB
poplib.py	14.84 KB
posixpath.py	15.87 KB
pprint.py	23.87 KB
profile.py	22.35 KB
pstats.py	28.64 KB
pty.py	5.09 KB
py_compile.py	7.65 KB
pyclbr.py	11.13 KB
pydoc.py	107.02 KB
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queue.py	11.23 KB
quopri.py	7.1 KB
random.py	32.44 KB
re.py	15.49 KB
reprlib.py	5.14 KB
rlcompleter.py	7.63 KB
runpy.py	12.8 KB
sched.py	6.2 KB
secrets.py	1.99 KB
selectors.py	19.08 KB
shelve.py	8.36 KB
shlex.py	13.18 KB
shutil.py	53.29 KB
signal.py	2.38 KB
site-packages	-
site.py	22.06 KB
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smtplib.py	44.35 KB
sndhdr.py	6.93 KB
socket.py	35.92 KB
socketserver.py	26.66 KB
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sre_compile.py	27.32 KB
sre_constants.py	7.01 KB
sre_parse.py	39.82 KB
ssl.py	52.63 KB
stat.py	5.36 KB
statistics.py	42.19 KB
string.py	10.32 KB
stringprep.py	12.61 KB
struct.py	257 B
subprocess.py	82.93 KB
sunau.py	17.73 KB
symtable.py	9.98 KB
sysconfig.py	26.96 KB
tabnanny.py	11.03 KB
tarfile.py	103.63 KB
telnetlib.py	22.71 KB
tempfile.py	28.5 KB
textwrap.py	19.31 KB
this.py	1003 B
threading.py	55.86 KB
timeit.py	13.18 KB
token.py	2.33 KB
tokenize.py	25.31 KB
trace.py	28.53 KB
traceback.py	25.61 KB
tracemalloc.py	17.62 KB
tty.py	879 B
turtle.py	140.39 KB
types.py	9.88 KB
typing.py	90.39 KB
unittest	-
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uuid.py	26.86 KB
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weakref.py	21.05 KB
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zipfile.py	87.34 KB
zipimport.py	30.17 KB
zoneinfo	-

Edit: colorsys.py

"""Conversion functions between RGB and other color systems.

This modules provides two functions for each color system ABC:

rgb_to_abc(r, g, b) --> a, b, c
  abc_to_rgb(a, b, c) --> r, g, b

All inputs and outputs are triples of floats in the range [0.0...1.0]
(with the exception of I and Q, which covers a slightly larger range).
Inputs outside the valid range may cause exceptions or invalid outputs.

Supported color systems:
RGB: Red, Green, Blue components
YIQ: Luminance, Chrominance (used by composite video signals)
HLS: Hue, Luminance, Saturation
HSV: Hue, Saturation, Value
"""

# References:
# http://en.wikipedia.org/wiki/YIQ
# http://en.wikipedia.org/wiki/HLS_color_space
# http://en.wikipedia.org/wiki/HSV_color_space

__all__ = ["rgb_to_yiq","yiq_to_rgb","rgb_to_hls","hls_to_rgb",
           "rgb_to_hsv","hsv_to_rgb"]

# Some floating point constants

ONE_THIRD = 1.0/3.0
ONE_SIXTH = 1.0/6.0
TWO_THIRD = 2.0/3.0

# YIQ: used by composite video signals (linear combinations of RGB)
# Y: perceived grey level (0.0 == black, 1.0 == white)
# I, Q: color components
#
# There are a great many versions of the constants used in these formulae.
# The ones in this library uses constants from the FCC version of NTSC.

def rgb_to_yiq(r, g, b):
    y = 0.30*r + 0.59*g + 0.11*b
    i = 0.74*(r-y) - 0.27*(b-y)
    q = 0.48*(r-y) + 0.41*(b-y)
    return (y, i, q)

def yiq_to_rgb(y, i, q):
    # r = y + (0.27*q + 0.41*i) / (0.74*0.41 + 0.27*0.48)
    # b = y + (0.74*q - 0.48*i) / (0.74*0.41 + 0.27*0.48)
    # g = y - (0.30*(r-y) + 0.11*(b-y)) / 0.59

r = y + 0.9468822170900693*i + 0.6235565819861433*q
    g = y - 0.27478764629897834*i - 0.6356910791873801*q
    b = y - 1.1085450346420322*i + 1.7090069284064666*q

if r < 0.0:
        r = 0.0
    if g < 0.0:
        g = 0.0
    if b < 0.0:
        b = 0.0
    if r > 1.0:
        r = 1.0
    if g > 1.0:
        g = 1.0
    if b > 1.0:
        b = 1.0
    return (r, g, b)

# HLS: Hue, Luminance, Saturation
# H: position in the spectrum
# L: color lightness
# S: color saturation

def rgb_to_hls(r, g, b):
    maxc = max(r, g, b)
    minc = min(r, g, b)
    sumc = (maxc+minc)
    rangec = (maxc-minc)
    l = sumc/2.0
    if minc == maxc:
        return 0.0, l, 0.0
    if l <= 0.5:
        s = rangec / sumc
    else:
        s = rangec / (2.0-sumc)
    rc = (maxc-r) / rangec
    gc = (maxc-g) / rangec
    bc = (maxc-b) / rangec
    if r == maxc:
        h = bc-gc
    elif g == maxc:
        h = 2.0+rc-bc
    else:
        h = 4.0+gc-rc
    h = (h/6.0) % 1.0
    return h, l, s

def hls_to_rgb(h, l, s):
    if s == 0.0:
        return l, l, l
    if l <= 0.5:
        m2 = l * (1.0+s)
    else:
        m2 = l+s-(l*s)
    m1 = 2.0*l - m2
    return (_v(m1, m2, h+ONE_THIRD), _v(m1, m2, h), _v(m1, m2, h-ONE_THIRD))

def _v(m1, m2, hue):
    hue = hue % 1.0
    if hue < ONE_SIXTH:
        return m1 + (m2-m1)*hue*6.0
    if hue < 0.5:
        return m2
    if hue < TWO_THIRD:
        return m1 + (m2-m1)*(TWO_THIRD-hue)*6.0
    return m1

# HSV: Hue, Saturation, Value
# H: position in the spectrum
# S: color saturation ("purity")
# V: color brightness

def rgb_to_hsv(r, g, b):
    maxc = max(r, g, b)
    minc = min(r, g, b)
    v = maxc
    if minc == maxc:
        return 0.0, 0.0, v
    s = (maxc-minc) / maxc
    rc = (maxc-r) / (maxc-minc)
    gc = (maxc-g) / (maxc-minc)
    bc = (maxc-b) / (maxc-minc)
    if r == maxc:
        h = bc-gc
    elif g == maxc:
        h = 2.0+rc-bc
    else:
        h = 4.0+gc-rc
    h = (h/6.0) % 1.0
    return h, s, v

def hsv_to_rgb(h, s, v):
    if s == 0.0:
        return v, v, v
    i = int(h*6.0) # XXX assume int() truncates!
    f = (h*6.0) - i
    p = v*(1.0 - s)
    q = v*(1.0 - s*f)
    t = v*(1.0 - s*(1.0-f))
    i = i%6
    if i == 0:
        return v, t, p
    if i == 1:
        return q, v, p
    if i == 2:
        return p, v, t
    if i == 3:
        return p, q, v
    if i == 4:
        return t, p, v
    if i == 5:
        return v, p, q
    # Cannot get here