golden hour

/usr/lib/python3.8/encodings

File/Folder	Size	Actions
__init__.py	5.46 KB
__pycache__	-
aliases.py	15.33 KB
ascii.py	1.22 KB
base64_codec.py	1.5 KB
big5.py	1019 B
big5hkscs.py	1.01 KB
bz2_codec.py	2.2 KB
charmap.py	2.04 KB
cp037.py	12.81 KB
cp1006.py	13.25 KB
cp1026.py	12.81 KB
cp1125.py	33.79 KB
cp1140.py	12.8 KB
cp1250.py	13.37 KB
cp1251.py	13.05 KB
cp1252.py	13.19 KB
cp1253.py	12.79 KB
cp1254.py	13.19 KB
cp1255.py	12.17 KB
cp1256.py	12.51 KB
cp1257.py	13.06 KB
cp1258.py	13.05 KB
cp273.py	13.8 KB
cp424.py	11.77 KB
cp437.py	33.75 KB
cp500.py	12.81 KB
cp720.py	13.37 KB
cp737.py	33.87 KB
cp775.py	33.67 KB
cp850.py	33.31 KB
cp852.py	34.18 KB
cp855.py	33.06 KB
cp856.py	12.13 KB
cp857.py	33.11 KB
cp858.py	33.22 KB
cp860.py	33.87 KB
cp861.py	33.82 KB
cp862.py	32.59 KB
cp863.py	33.45 KB
cp864.py	32.87 KB
cp865.py	33.81 KB
cp866.py	33.59 KB
cp869.py	32.19 KB
cp874.py	12.3 KB
cp875.py	12.55 KB
cp932.py	1023 B
cp949.py	1023 B
cp950.py	1023 B
euc_jis_2004.py	1.03 KB
euc_jisx0213.py	1.03 KB
euc_jp.py	1 KB
euc_kr.py	1 KB
gb18030.py	1.01 KB
gb2312.py	1 KB
gbk.py	1015 B
hex_codec.py	1.47 KB
hp_roman8.py	13.16 KB
hz.py	1011 B
idna.py	8.96 KB
iso2022_jp.py	1.03 KB
iso2022_jp_1.py	1.04 KB
iso2022_jp_2.py	1.04 KB
iso2022_jp_2004.py	1.05 KB
iso2022_jp_3.py	1.04 KB
iso2022_jp_ext.py	1.04 KB
iso2022_kr.py	1.03 KB
iso8859_1.py	12.87 KB
iso8859_10.py	13.27 KB
iso8859_11.py	12.05 KB
iso8859_13.py	12.96 KB
iso8859_14.py	13.33 KB
iso8859_15.py	12.9 KB
iso8859_16.py	13.24 KB
iso8859_2.py	13.09 KB
iso8859_3.py	12.78 KB
iso8859_4.py	13.06 KB
iso8859_5.py	12.71 KB
iso8859_6.py	10.58 KB
iso8859_7.py	12.54 KB
iso8859_8.py	10.78 KB
iso8859_9.py	12.85 KB
johab.py	1023 B
koi8_r.py	13.46 KB
koi8_t.py	12.88 KB
koi8_u.py	13.44 KB
kz1048.py	13.4 KB
latin_1.py	1.23 KB
mac_arabic.py	35.61 KB
mac_centeuro.py	13.77 KB
mac_croatian.py	13.31 KB
mac_cyrillic.py	13.14 KB
mac_farsi.py	14.81 KB
mac_greek.py	13.4 KB
mac_iceland.py	13.18 KB
mac_latin2.py	13.79 KB
mac_roman.py	13.16 KB
mac_romanian.py	13.34 KB
mac_turkish.py	13.2 KB
mbcs.py	1.18 KB
oem.py	1019 B
palmos.py	13.2 KB
ptcp154.py	13.69 KB
punycode.py	6.72 KB
quopri_codec.py	1.49 KB
raw_unicode_escape.py	1.18 KB
rot_13.py	2.39 KB
shift_jis.py	1.01 KB
shift_jis_2004.py	1.03 KB
shift_jisx0213.py	1.03 KB
tis_620.py	12.01 KB
undefined.py	1.27 KB
unicode_escape.py	1.16 KB
utf_16.py	5.11 KB
utf_16_be.py	1.01 KB
utf_16_le.py	1.01 KB
utf_32.py	5.01 KB
utf_32_be.py	930 B
utf_32_le.py	930 B
utf_7.py	946 B
utf_8.py	1005 B
utf_8_sig.py	4.04 KB
uu_codec.py	2.78 KB
zlib_codec.py	2.15 KB

Edit: idna.py

# This module implements the RFCs 3490 (IDNA) and 3491 (Nameprep)

import stringprep, re, codecs
from unicodedata import ucd_3_2_0 as unicodedata

# IDNA section 3.1
dots = re.compile("[\u002E\u3002\uFF0E\uFF61]")

# IDNA section 5
ace_prefix = b"xn--"
sace_prefix = "xn--"

# This assumes query strings, so AllowUnassigned is true
def nameprep(label):
    # Map
    newlabel = []
    for c in label:
        if stringprep.in_table_b1(c):
            # Map to nothing
            continue
        newlabel.append(stringprep.map_table_b2(c))
    label = "".join(newlabel)

# Normalize
    label = unicodedata.normalize("NFKC", label)

# Prohibit
    for c in label:
        if stringprep.in_table_c12(c) or \
           stringprep.in_table_c22(c) or \
           stringprep.in_table_c3(c) or \
           stringprep.in_table_c4(c) or \
           stringprep.in_table_c5(c) or \
           stringprep.in_table_c6(c) or \
           stringprep.in_table_c7(c) or \
           stringprep.in_table_c8(c) or \
           stringprep.in_table_c9(c):
            raise UnicodeError("Invalid character %r" % c)

# Check bidi
    RandAL = [stringprep.in_table_d1(x) for x in label]
    for c in RandAL:
        if c:
            # There is a RandAL char in the string. Must perform further
            # tests:
            # 1) The characters in section 5.8 MUST be prohibited.
            # This is table C.8, which was already checked
            # 2) If a string contains any RandALCat character, the string
            # MUST NOT contain any LCat character.
            if any(stringprep.in_table_d2(x) for x in label):
                raise UnicodeError("Violation of BIDI requirement 2")

# 3) If a string contains any RandALCat character, a
            # RandALCat character MUST be the first character of the
            # string, and a RandALCat character MUST be the last
            # character of the string.
            if not RandAL[0] or not RandAL[-1]:
                raise UnicodeError("Violation of BIDI requirement 3")

return label

def ToASCII(label):
    try:
        # Step 1: try ASCII
        label = label.encode("ascii")
    except UnicodeError:
        pass
    else:
        # Skip to step 3: UseSTD3ASCIIRules is false, so
        # Skip to step 8.
        if 0 < len(label) < 64:
            return label
        raise UnicodeError("label empty or too long")

# Step 2: nameprep
    label = nameprep(label)

# Step 3: UseSTD3ASCIIRules is false
    # Step 4: try ASCII
    try:
        label = label.encode("ascii")
    except UnicodeError:
        pass
    else:
        # Skip to step 8.
        if 0 < len(label) < 64:
            return label
        raise UnicodeError("label empty or too long")

# Step 5: Check ACE prefix
    if label.startswith(sace_prefix):
        raise UnicodeError("Label starts with ACE prefix")

# Step 6: Encode with PUNYCODE
    label = label.encode("punycode")

# Step 7: Prepend ACE prefix
    label = ace_prefix + label

# Step 8: Check size
    if 0 < len(label) < 64:
        return label
    raise UnicodeError("label empty or too long")

def ToUnicode(label):
    # Step 1: Check for ASCII
    if isinstance(label, bytes):
        pure_ascii = True
    else:
        try:
            label = label.encode("ascii")
            pure_ascii = True
        except UnicodeError:
            pure_ascii = False
    if not pure_ascii:
        # Step 2: Perform nameprep
        label = nameprep(label)
        # It doesn't say this, but apparently, it should be ASCII now
        try:
            label = label.encode("ascii")
        except UnicodeError:
            raise UnicodeError("Invalid character in IDN label")
    # Step 3: Check for ACE prefix
    if not label.startswith(ace_prefix):
        return str(label, "ascii")

# Step 4: Remove ACE prefix
    label1 = label[len(ace_prefix):]

# Step 5: Decode using PUNYCODE
    result = label1.decode("punycode")

# Step 6: Apply ToASCII
    label2 = ToASCII(result)

# Step 7: Compare the result of step 6 with the one of step 3
    # label2 will already be in lower case.
    if str(label, "ascii").lower() != str(label2, "ascii"):
        raise UnicodeError("IDNA does not round-trip", label, label2)

# Step 8: return the result of step 5
    return result

### Codec APIs

class Codec(codecs.Codec):
    def encode(self, input, errors='strict'):

if errors != 'strict':
            # IDNA is quite clear that implementations must be strict
            raise UnicodeError("unsupported error handling "+errors)

if not input:
            return b'', 0

try:
            result = input.encode('ascii')
        except UnicodeEncodeError:
            pass
        else:
            # ASCII name: fast path
            labels = result.split(b'.')
            for label in labels[:-1]:
                if not (0 < len(label) < 64):
                    raise UnicodeError("label empty or too long")
            if len(labels[-1]) >= 64:
                raise UnicodeError("label too long")
            return result, len(input)

result = bytearray()
        labels = dots.split(input)
        if labels and not labels[-1]:
            trailing_dot = b'.'
            del labels[-1]
        else:
            trailing_dot = b''
        for label in labels:
            if result:
                # Join with U+002E
                result.extend(b'.')
            result.extend(ToASCII(label))
        return bytes(result+trailing_dot), len(input)

def decode(self, input, errors='strict'):

if errors != 'strict':
            raise UnicodeError("Unsupported error handling "+errors)

if not input:
            return "", 0

# IDNA allows decoding to operate on Unicode strings, too.
        if not isinstance(input, bytes):
            # XXX obviously wrong, see #3232
            input = bytes(input)

if ace_prefix not in input:
            # Fast path
            try:
                return input.decode('ascii'), len(input)
            except UnicodeDecodeError:
                pass

labels = input.split(b".")

if labels and len(labels[-1]) == 0:
            trailing_dot = '.'
            del labels[-1]
        else:
            trailing_dot = ''

result = []
        for label in labels:
            result.append(ToUnicode(label))

return ".".join(result)+trailing_dot, len(input)

class IncrementalEncoder(codecs.BufferedIncrementalEncoder):
    def _buffer_encode(self, input, errors, final):
        if errors != 'strict':
            # IDNA is quite clear that implementations must be strict
            raise UnicodeError("unsupported error handling "+errors)

if not input:
            return (b'', 0)

labels = dots.split(input)
        trailing_dot = b''
        if labels:
            if not labels[-1]:
                trailing_dot = b'.'
                del labels[-1]
            elif not final:
                # Keep potentially unfinished label until the next call
                del labels[-1]
                if labels:
                    trailing_dot = b'.'

result = bytearray()
        size = 0
        for label in labels:
            if size:
                # Join with U+002E
                result.extend(b'.')
                size += 1
            result.extend(ToASCII(label))
            size += len(label)

result += trailing_dot
        size += len(trailing_dot)
        return (bytes(result), size)

class IncrementalDecoder(codecs.BufferedIncrementalDecoder):
    def _buffer_decode(self, input, errors, final):
        if errors != 'strict':
            raise UnicodeError("Unsupported error handling "+errors)

if not input:
            return ("", 0)

# IDNA allows decoding to operate on Unicode strings, too.
        if isinstance(input, str):
            labels = dots.split(input)
        else:
            # Must be ASCII string
            input = str(input, "ascii")
            labels = input.split(".")

trailing_dot = ''
        if labels:
            if not labels[-1]:
                trailing_dot = '.'
                del labels[-1]
            elif not final:
                # Keep potentially unfinished label until the next call
                del labels[-1]
                if labels:
                    trailing_dot = '.'

result = []
        size = 0
        for label in labels:
            result.append(ToUnicode(label))
            if size:
                size += 1
            size += len(label)

result = ".".join(result) + trailing_dot
        size += len(trailing_dot)
        return (result, size)

class StreamWriter(Codec,codecs.StreamWriter):
    pass

class StreamReader(Codec,codecs.StreamReader):
    pass

### encodings module API

def getregentry():
    return codecs.CodecInfo(
        name='idna',
        encode=Codec().encode,
        decode=Codec().decode,
        incrementalencoder=IncrementalEncoder,
        incrementaldecoder=IncrementalDecoder,
        streamwriter=StreamWriter,
        streamreader=StreamReader,
    )