python.vim

" For version 5.x: Clear all syntax items
" For versions greater than 6.x: Quit when a syntax file was already loaded
if v:version < 600
    syntax clear
elseif exists('b:current_syntax')
    finish
endif

"
" Commands
"
command! -buffer Python2Syntax let b:python_version_2 = 1 | let &syntax=&syntax
command! -buffer Python3Syntax let b:python_version_2 = 0 | let &syntax=&syntax

" Enable option if it's not defined
function! s:EnableByDefault(name)
    if !exists(a:name)
        let {a:name} = 1
    endif
endfunction

" Check if option is enabled
function! s:Enabled(name)
    return exists(a:name) && {a:name}
endfunction

" Is it Python 2 syntax?
function! s:Python2Syntax()
    if exists('b:python_version_2')
        return b:python_version_2
    endif
    return s:Enabled('g:python_version_2')
endfunction

"
" Default options
"

call s:EnableByDefault('g:python_slow_sync')
call s:EnableByDefault('g:python_highlight_builtin_funcs_kwarg')

if s:Enabled('g:python_highlight_all')
    call s:EnableByDefault('g:python_highlight_builtins')
    call s:EnableByDefault('g:python_highlight_exceptions')
    call s:EnableByDefault('g:python_highlight_string_formatting')
    call s:EnableByDefault('g:python_highlight_string_format')
    call s:EnableByDefault('g:python_highlight_string_templates')
    call s:EnableByDefault('g:python_highlight_indent_errors')
    call s:EnableByDefault('g:python_highlight_space_errors')
    call s:EnableByDefault('g:python_highlight_doctests')
    call s:EnableByDefault('g:python_print_as_function')
    call s:EnableByDefault('g:python_highlight_func_calls')
    call s:EnableByDefault('g:python_highlight_class_vars')
    call s:EnableByDefault('g:python_highlight_operators')
endif

if s:Enabled('g:python_highlight_builtins')
    call s:EnableByDefault('g:python_highlight_builtin_objs')
    call s:EnableByDefault('g:python_highlight_builtin_types')
    call s:EnableByDefault('g:python_highlight_builtin_funcs')
endif

"
" Function calls
"

if s:Enabled('g:python_highlight_func_calls')
    syn match pythonFunctionCall '\%([^[:cntrl:][:space:][:punct:][:digit:]]\|_\)\%([^[:cntrl:][:punct:][:space:]]\|_\)*\ze\%(\s*(\)'
endif

"
" Keywords
"

syn keyword pythonStatement     break continue del return pass yield global assert lambda with
syn keyword pythonStatement     raise nextgroup=pythonExClass skipwhite
syn keyword pythonStatement     def class nextgroup=pythonFunction skipwhite
if s:Enabled('g:python_highlight_class_vars')
    syn keyword pythonClassVar    self cls
endif
syn keyword pythonRepeat        for while
syn keyword pythonConditional   if elif else
syn keyword pythonException     try except finally
" The standard pyrex.vim unconditionally removes the pythonInclude group, so
" we provide a dummy group here to avoid crashing pyrex.vim.
syn keyword pythonInclude       import
syn keyword pythonImport        import
syn match pythonRaiseFromStatement      '\<from\>'
syn match pythonImport          '^\s*\zsfrom\>'


if s:Python2Syntax()
    if !s:Enabled('g:python_print_as_function')
        syn keyword pythonStatement  print
    endif
    syn keyword pythonStatement   exec
    syn keyword pythonImport      as
    syn match   pythonFunction    '[a-zA-Z_][a-zA-Z0-9_]*' display contained
else
    syn keyword pythonStatement   as nonlocal
    syn match   pythonStatement   '\v\.@<!<await>'
    syn match   pythonFunction    '\%([^[:cntrl:][:space:][:punct:][:digit:]]\|_\)\%([^[:cntrl:][:punct:][:space:]]\|_\)*' display contained
    syn match   pythonStatement   '\<async\s\+def\>' nextgroup=pythonFunction skipwhite
    syn match   pythonStatement   '\<async\s\+with\>'
    syn match   pythonStatement   '\<async\s\+for\>'
    syn cluster pythonExpression contains=pythonStatement,pythonRepeat,pythonConditional,pythonOperator,pythonNumber,pythonHexNumber,pythonOctNumber,pythonBinNumber,pythonFloat,pythonString,pythonBytes,pythonBoolean,pythonNone,pythonSingleton,pythonBuiltinObj,pythonBuiltinFunc,pythonBuiltinType
endif


"
" Operators
"
syn keyword pythonOperator      and in is not or
if s:Enabled('g:python_highlight_operators')
    syn match pythonOperator        '\V=\|-\|+\|*\|@\|/\|%\|&\||\|^\|~\|<\|>\|!='
endif
syn match pythonError           '[$?]\|\([-+@%&|^~]\)\1\{1,}\|\([=*/<>]\)\2\{2,}\|\([+@/%&|^~<>]\)\3\@![-+*@/%&|^~<>]\|\*\*[*@/%&|^<>]\|=[*@/%&|^<>]\|-[+*@/%&|^~<]\|[<!>]\+=\{2,}\|!\{2,}=\+' display

"
" Decorators (new in Python 2.4)
"

syn match   pythonDecorator    '^\s*\zs@' display nextgroup=pythonDottedName skipwhite
if s:Python2Syntax()
    syn match   pythonDottedName '[a-zA-Z_][a-zA-Z0-9_]*\%(\.[a-zA-Z_][a-zA-Z0-9_]*\)*' display contained
else
    syn match   pythonDottedName '\%([^[:cntrl:][:space:][:punct:][:digit:]]\|_\)\%([^[:cntrl:][:punct:][:space:]]\|_\)*\%(\.\%([^[:cntrl:][:space:][:punct:][:digit:]]\|_\)\%([^[:cntrl:][:punct:][:space:]]\|_\)*\)*' display contained
endif
syn match   pythonDot        '\.' display containedin=pythonDottedName

"
" Comments
"

syn match   pythonComment       '#.*$' display contains=pythonTodo,@Spell
if !s:Enabled('g:python_highlight_file_headers_as_comments')
    syn match   pythonRun         '\%^#!.*$'
    syn match   pythonCoding      '\%^.*\%(\n.*\)\?#.*coding[:=]\s*[0-9A-Za-z-_.]\+.*$'
endif
syn keyword pythonTodo          TODO FIXME XXX contained

"
" Errors
"

syn match pythonError           '\<\d\+[^0-9[:space:]]\+\>' display

" Mixing spaces and tabs also may be used for pretty formatting multiline
" statements
if s:Enabled('g:python_highlight_indent_errors')
    syn match pythonIndentError   '^\s*\%( \t\|\t \)\s*\S'me=e-1 display
endif

" Trailing space errors
if s:Enabled('g:python_highlight_space_errors')
    syn match pythonSpaceError    '\s\+$' display
endif

"
" Strings
"

if s:Python2Syntax()
    " Python 2 strings
    syn region pythonString   start=+[bB]\='+ skip=+\\\\\|\\'\|\\$+ excludenl end=+'+ end=+$+ keepend contains=pythonBytesEscape,pythonBytesEscapeError,pythonUniEscape,pythonUniEscapeError,@Spell
    syn region pythonString   start=+[bB]\="+ skip=+\\\\\|\\"\|\\$+ excludenl end=+"+ end=+$+ keepend contains=pythonBytesEscape,pythonBytesEscapeError,pythonUniEscape,pythonUniEscapeError,@Spell
    syn region pythonString   start=+[bB]\="""+ skip=+\\"+ end=+"""+ keepend contains=pythonBytesEscape,pythonBytesEscapeError,pythonUniEscape,pythonUniEscapeError,pythonDocTest2,pythonSpaceError,@Spell
    syn region pythonString   start=+[bB]\='''+ skip=+\\'+ end=+'''+ keepend contains=pythonBytesEscape,pythonBytesEscapeError,pythonUniEscape,pythonUniEscapeError,pythonDocTest,pythonSpaceError,@Spell
else
    " Python 3 byte strings
    syn region pythonBytes    start=+[bB]'+ skip=+\\\\\|\\'\|\\$+ excludenl end=+'+ end=+$+ keepend contains=pythonBytesError,pythonBytesContent,@Spell
    syn region pythonBytes    start=+[bB]"+ skip=+\\\\\|\\"\|\\$+ excludenl end=+"+ end=+$+ keepend contains=pythonBytesError,pythonBytesContent,@Spell
    syn region pythonBytes    start=+[bB]'''+ skip=+\\'+ end=+'''+ keepend contains=pythonBytesError,pythonBytesContent,pythonDocTest,pythonSpaceError,@Spell
    syn region pythonBytes    start=+[bB]"""+ skip=+\\"+ end=+"""+ keepend contains=pythonBytesError,pythonBytesContent,pythonDocTest2,pythonSpaceError,@Spell

    syn match pythonBytesError    '.\+' display contained
    syn match pythonBytesContent  '[\u0000-\u00ff]\+' display contained contains=pythonBytesEscape,pythonBytesEscapeError
endif

syn match pythonBytesEscape       +\\[abfnrtv'"\\]+ display contained
syn match pythonBytesEscape       '\\\o\o\=\o\=' display contained
syn match pythonBytesEscapeError  '\\\o\{,2}[89]' display contained
syn match pythonBytesEscape       '\\x\x\{2}' display contained
syn match pythonBytesEscapeError  '\\x\x\=\X' display contained
syn match pythonBytesEscape       '\\$'

syn match pythonUniEscape         '\\u\x\{4}' display contained
syn match pythonUniEscapeError    '\\u\x\{,3}\X' display contained
syn match pythonUniEscape         '\\U\x\{8}' display contained
syn match pythonUniEscapeError    '\\U\x\{,7}\X' display contained
syn match pythonUniEscape         '\\N{[A-Z ]\+}' display contained
syn match pythonUniEscapeError    '\\N{[^A-Z ]\+}' display contained

if s:Python2Syntax()
    " Python 2 Unicode strings
    syn region pythonUniString  start=+[uU]'+ skip=+\\\\\|\\'\|\\$+ excludenl end=+'+ end=+$+ keepend contains=pythonBytesEscape,pythonBytesEscapeError,pythonUniEscape,pythonUniEscapeError,@Spell
    syn region pythonUniString  start=+[uU]"+ skip=+\\\\\|\\"\|\\$+ excludenl end=+"+ end=+$+ keepend contains=pythonBytesEscape,pythonBytesEscapeError,pythonUniEscape,pythonUniEscapeError,@Spell
    syn region pythonUniString  start=+[uU]'''+ skip=+\\'+ end=+'''+ keepend contains=pythonBytesEscape,pythonBytesEscapeError,pythonUniEscape,pythonUniEscapeError,pythonDocTest,pythonSpaceError,@Spell
    syn region pythonUniString  start=+[uU]"""+ skip=+\\"+ end=+"""+ keepend contains=pythonBytesEscape,pythonBytesEscapeError,pythonUniEscape,pythonUniEscapeError,pythonDocTest2,pythonSpaceError,@Spell
else
    " Python 3 strings
    syn region pythonString   start=+'+ skip=+\\\\\|\\'\|\\$+ excludenl end=+'+ end=+$+ keepend contains=pythonBytesEscape,pythonBytesEscapeError,pythonUniEscape,pythonUniEscapeError,@Spell
    syn region pythonString   start=+"+ skip=+\\\\\|\\"\|\\$+ excludenl end=+"+ end=+$+ keepend contains=pythonBytesEscape,pythonBytesEscapeError,pythonUniEscape,pythonUniEscapeError,@Spell
    syn region pythonString   start=+'''+ skip=+\\'+ end=+'''+ keepend contains=pythonBytesEscape,pythonBytesEscapeError,pythonUniEscape,pythonUniEscapeError,pythonDocTest,pythonSpaceError,@Spell
    syn region pythonString   start=+"""+ skip=+\\"+ end=+"""+ keepend contains=pythonBytesEscape,pythonBytesEscapeError,pythonUniEscape,pythonUniEscapeError,pythonDocTest2,pythonSpaceError,@Spell

    syn region pythonFString   start=+[fF]'+ skip=+\\\\\|\\'\|\\$+ excludenl end=+'+ end=+$+ keepend contains=pythonBytesEscape,pythonBytesEscapeError,pythonUniEscape,pythonUniEscapeError,@Spell
    syn region pythonFString   start=+[fF]"+ skip=+\\\\\|\\"\|\\$+ excludenl end=+"+ end=+$+ keepend contains=pythonBytesEscape,pythonBytesEscapeError,pythonUniEscape,pythonUniEscapeError,@Spell
    syn region pythonFString   start=+[fF]'''+ skip=+\\'+ end=+'''+ keepend contains=pythonBytesEscape,pythonBytesEscapeError,pythonUniEscape,pythonUniEscapeError,pythonDocTest,pythonSpaceError,@Spell
    syn region pythonFString   start=+[fF]"""+ skip=+\\"+ end=+"""+ keepend contains=pythonBytesEscape,pythonBytesEscapeError,pythonUniEscape,pythonUniEscapeError,pythonDocTest2,pythonSpaceError,@Spell
endif

if s:Python2Syntax()
    " Python 2 Unicode raw strings
    syn region pythonUniRawString start=+[uU][rR]'+ skip=+\\\\\|\\'\|\\$+ excludenl end=+'+ end=+$+ keepend contains=pythonRawEscape,pythonUniRawEscape,pythonUniRawEscapeError,@Spell
    syn region pythonUniRawString start=+[uU][rR]"+ skip=+\\\\\|\\"\|\\$+ excludenl end=+"+ end=+$+ keepend contains=pythonRawEscape,pythonUniRawEscape,pythonUniRawEscapeError,@Spell
    syn region pythonUniRawString start=+[uU][rR]'''+ skip=+\\'+ end=+'''+ keepend contains=pythonUniRawEscape,pythonUniRawEscapeError,pythonDocTest,pythonSpaceError,@Spell
    syn region pythonUniRawString start=+[uU][rR]"""+ skip=+\\"+ end=+"""+ keepend contains=pythonUniRawEscape,pythonUniRawEscapeError,pythonDocTest2,pythonSpaceError,@Spell

    syn match  pythonUniRawEscape       '\%([^\\]\%(\\\\\)*\)\@<=\\u\x\{4}' display contained
    syn match  pythonUniRawEscapeError  '\%([^\\]\%(\\\\\)*\)\@<=\\u\x\{,3}\X' display contained
endif

" Python 2/3 raw strings
if s:Python2Syntax()
    syn region pythonRawString  start=+[bB]\=[rR]'+ skip=+\\\\\|\\'\|\\$+ excludenl end=+'+ end=+$+ keepend contains=pythonRawEscape,@Spell
    syn region pythonRawString  start=+[bB]\=[rR]"+ skip=+\\\\\|\\"\|\\$+ excludenl end=+"+ end=+$+ keepend contains=pythonRawEscape,@Spell
    syn region pythonRawString  start=+[bB]\=[rR]'''+ skip=+\\'+ end=+'''+ keepend contains=pythonDocTest,pythonSpaceError,@Spell
    syn region pythonRawString  start=+[bB]\=[rR]"""+ skip=+\\"+ end=+"""+ keepend contains=pythonDocTest2,pythonSpaceError,@Spell
else
    syn region pythonRawString  start=+[rR]'+ skip=+\\\\\|\\'\|\\$+ excludenl end=+'+ end=+$+ keepend contains=pythonRawEscape,@Spell
    syn region pythonRawString  start=+[rR]"+ skip=+\\\\\|\\"\|\\$+ excludenl end=+"+ end=+$+ keepend contains=pythonRawEscape,@Spell
    syn region pythonRawString  start=+[rR]'''+ skip=+\\'+ end=+'''+ keepend contains=pythonDocTest,pythonSpaceError,@Spell
    syn region pythonRawString  start=+[rR]"""+ skip=+\\"+ end=+"""+ keepend contains=pythonDocTest2,pythonSpaceError,@Spell

    syn region pythonRawFString   start=+\%([fF][rR]\|[rR][fF]\)'+ skip=+\\\\\|\\'\|\\$+ excludenl end=+'+ end=+$+ keepend contains=pythonRawEscape,@Spell
    syn region pythonRawFString   start=+\%([fF][rR]\|[rR][fF]\)"+ skip=+\\\\\|\\"\|\\$+ excludenl end=+"+ end=+$+ keepend contains=pythonRawEscape,@Spell
    syn region pythonRawFString   start=+\%([fF][rR]\|[rR][fF]\)'''+ skip=+\\'+ end=+'''+ keepend contains=pythonDocTest,pythonSpaceError,@Spell
    syn region pythonRawFString   start=+\%([fF][rR]\|[rR][fF]\)"""+ skip=+\\"+ end=+"""+ keepend contains=pythonDocTest,pythonSpaceError,@Spell

    syn region pythonRawBytes  start=+\%([bB][rR]\|[rR][bB]\)'+ skip=+\\\\\|\\'\|\\$+ excludenl end=+'+ end=+$+ keepend contains=pythonRawEscape,@Spell
    syn region pythonRawBytes  start=+\%([bB][rR]\|[rR][bB]\)"+ skip=+\\\\\|\\"\|\\$+ excludenl end=+"+ end=+$+ keepend contains=pythonRawEscape,@Spell
    syn region pythonRawBytes  start=+\%([bB][rR]\|[rR][bB]\)'''+ skip=+\\'+ end=+'''+ keepend contains=pythonDocTest,pythonSpaceError,@Spell
    syn region pythonRawBytes  start=+\%([bB][rR]\|[rR][bB]\)"""+ skip=+\\"+ end=+"""+ keepend contains=pythonDocTest2,pythonSpaceError,@Spell
endif

syn match pythonRawEscape +\\['"]+ display contained

if s:Enabled('g:python_highlight_string_formatting')
    " % operator string formatting
    if s:Python2Syntax()
        syn match pythonStrFormatting '%\%(([^)]\+)\)\=[-#0 +]*\d*\%(\.\d\+\)\=[hlL]\=[diouxXeEfFgGcrs%]' contained containedin=pythonString,pythonUniString,pythonUniRawString,pythonRawString,pythonBytesContent
        syn match pythonStrFormatting '%[-#0 +]*\%(\*\|\d\+\)\=\%(\.\%(\*\|\d\+\)\)\=[hlL]\=[diouxXeEfFgGcrs%]' contained containedin=pythonString,pythonUniString,pythonUniRawString,pythonRawString,pythonBytesContent
    else
        syn match pythonStrFormatting '%\%(([^)]\+)\)\=[-#0 +]*\d*\%(\.\d\+\)\=[hlL]\=[diouxXeEfFgGcrs%]' contained containedin=pythonString,pythonRawString,pythonBytesContent
        syn match pythonStrFormatting '%[-#0 +]*\%(\*\|\d\+\)\=\%(\.\%(\*\|\d\+\)\)\=[hlL]\=[diouxXeEfFgGcrs%]' contained containedin=pythonString,pythonRawString,pythonBytesContent
    endif
endif

if s:Enabled('g:python_highlight_string_format')
    " str.format syntax
    if s:Python2Syntax()
        syn match pythonStrFormat '{{\|}}' contained containedin=pythonString,pythonUniString,pythonUniRawString,pythonRawString
        syn match pythonStrFormat '{\%(\%([^[:cntrl:][:space:][:punct:][:digit:]]\|_\)\%([^[:cntrl:][:punct:][:space:]]\|_\)*\|\d\+\)\=\%(\.\%([^[:cntrl:][:space:][:punct:][:digit:]]\|_\)\%([^[:cntrl:][:punct:][:space:]]\|_\)*\|\[\%(\d\+\|[^!:\}]\+\)\]\)*\%(![rsa]\)\=\%(:\%({\%(\%([^[:cntrl:][:space:][:punct:][:digit:]]\|_\)\%([^[:cntrl:][:punct:][:space:]]\|_\)*\|\d\+\)}\|\%([^}]\=[<>=^]\)\=[ +-]\=#\=0\=\d*,\=\%(\.\d\+\)\=[bcdeEfFgGnosxX%]\=\)\=\)\=}' contained containedin=pythonString,pythonUniString,pythonUniRawString,pythonRawString
    else
        syn match pythonFormatString /['"].\{-}['"]\(.format\)\@=/ contains=pythonStrFormat
        syn match pythonStrFormat "{\%(\%([^[:cntrl:][:space:][:punct:][:digit:]]\|_\)\%([^[:cntrl:][:punct:][:space:]]\|_\)*\|\d\+\)\=\%(\.\%([^[:cntrl:][:space:][:punct:][:digit:]]\|_\)\%([^[:cntrl:][:punct:][:space:]]\|_\)*\|\[\%(\d\+\|[^!:\}]\+\)\]\)*\%(![rsa]\)\=\%(:\%({\%(\%([^[:cntrl:][:space:][:punct:][:digit:]]\|_\)\%([^[:cntrl:][:punct:][:space:]]\|_\)*\|\d\+\)}\|\%([^}]\=[<>=^]\)\=[ +-]\=#\=0\=\d*,\=\%(\.\d\+\)\=[bcdeEfFgGnosxX%]\=\)\=\)\=}" contained containedin=pythonFormatString,pythonRawString
        syn region pythonStrInterpRegion start="{"he=e+1,rs=e+1 end="\%(![rsa]\)\=\%(:\%({\%(\%([^[:cntrl:][:space:][:punct:][:digit:]]\|_\)\%([^[:cntrl:][:punct:][:space:]]\|_\)*\|\d\+\)}\|\%([^}]\=[<>=^]\)\=[ +-]\=#\=0\=\d*,\=\%(\.\d\+\)\=[bcdeEfFgGnosxX%]\=\)\=\)\=}"hs=s-1,re=s-1 extend contained containedin=pythonFString,pythonRawFString contains=pythonStrInterpRegion,@pythonExpression
        syn match pythonStrFormat "{{\|}}" contained containedin=pythonString,pythonRawString,pythonFString,pythonRawFString
    endif
endif

if s:Enabled('g:python_highlight_string_templates')
    " string.Template format
    if s:Python2Syntax()
        syn match pythonStrTemplate '\$\$' contained containedin=pythonString,pythonUniString,pythonUniRawString,pythonRawString
        syn match pythonStrTemplate '\${[a-zA-Z_][a-zA-Z0-9_]*}' contained containedin=pythonString,pythonUniString,pythonUniRawString,pythonRawString
        syn match pythonStrTemplate '\$[a-zA-Z_][a-zA-Z0-9_]*' contained containedin=pythonString,pythonUniString,pythonUniRawString,pythonRawString
    else
        syn match pythonStrTemplate '\$\$' contained containedin=pythonString,pythonRawString
        syn match pythonStrTemplate '\${[a-zA-Z_][a-zA-Z0-9_]*}' contained containedin=pythonString,pythonRawString
        syn match pythonStrTemplate '\$[a-zA-Z_][a-zA-Z0-9_]*' contained containedin=pythonString,pythonRawString
    endif
endif

if s:Enabled('g:python_highlight_doctests')
    " DocTests
    syn region pythonDocTest   start='^\s*>>>' skip=+\\'+ end=+'''+he=s-1 end='^\s*$' contained
    syn region pythonDocTest2  start='^\s*>>>' skip=+\\"+ end=+"""+he=s-1 end='^\s*$' contained
endif

"
" Numbers (ints, longs, floats, complex)
"

if s:Python2Syntax()
    syn match   pythonHexError    '\<0[xX]\x*[g-zG-Z]\+\x*[lL]\=\>' display
    syn match   pythonOctError    '\<0[oO]\=\o*\D\+\d*[lL]\=\>' display
    syn match   pythonBinError    '\<0[bB][01]*\D\+\d*[lL]\=\>' display

    syn match   pythonHexNumber   '\<0[xX]\x\+[lL]\=\>' display
    syn match   pythonOctNumber   '\<0[oO]\o\+[lL]\=\>' display
    syn match   pythonBinNumber   '\<0[bB][01]\+[lL]\=\>' display

    syn match   pythonNumberError '\<\d\+\D[lL]\=\>' display
    syn match   pythonNumber      '\<\d[lL]\=\>' display
    syn match   pythonNumber      '\<[0-9]\d\+[lL]\=\>' display
    syn match   pythonNumber      '\<\d\+[lLjJ]\>' display

    syn match   pythonOctError    '\<0[oO]\=\o*[8-9]\d*[lL]\=\>' display
    syn match   pythonBinError    '\<0[bB][01]*[2-9]\d*[lL]\=\>' display

    syn match   pythonFloat       '\.\d\+\%([eE][+-]\=\d\+\)\=[jJ]\=\>' display
    syn match   pythonFloat       '\<\d\+[eE][+-]\=\d\+[jJ]\=\>' display
    syn match   pythonFloat       '\<\d\+\.\d*\%([eE][+-]\=\d\+\)\=[jJ]\=' display
else
    syn match   pythonOctError    '\<0[oO]\=\o*\D\+\d*\>' display
    " pythonHexError comes after pythonOctError so that 0xffffl is pythonHexError
    syn match   pythonHexError    '\<0[xX]\x*[g-zG-Z]\x*\>' display
    syn match   pythonBinError    '\<0[bB][01]*\D\+\d*\>' display

    syn match   pythonHexNumber   '\<0[xX][_0-9a-fA-F]*\x\>' display
    syn match   pythonOctNumber   '\<0[oO][_0-7]*\o\>' display
    syn match   pythonBinNumber   '\<0[bB][_01]*[01]\>' display

    syn match   pythonNumberError '\<\d[_0-9]*\D\>' display
    syn match   pythonNumberError '\<0[_0-9]\+\>' display
    syn match   pythonNumberError '\<0_x\S*\>' display
    syn match   pythonNumberError '\<0[bBxXoO][_0-9a-fA-F]*_\>' display
    syn match   pythonNumberError '\<\d[_0-9]*_\>' display
    syn match   pythonNumber      '\<\d\>' display
    syn match   pythonNumber      '\<[1-9][_0-9]*\d\>' display
    syn match   pythonNumber      '\<\d[jJ]\>' display
    syn match   pythonNumber      '\<[1-9][_0-9]*\d[jJ]\>' display

    syn match   pythonOctError    '\<0[oO]\=\o*[8-9]\d*\>' display
    syn match   pythonBinError    '\<0[bB][01]*[2-9]\d*\>' display

    syn match   pythonFloat       '\.\d\%([_0-9]*\d\)\=\%([eE][+-]\=\d\%([_0-9]*\d\)\=\)\=[jJ]\=\>' display
    syn match   pythonFloat       '\<\d\%([_0-9]*\d\)\=[eE][+-]\=\d\%([_0-9]*\d\)\=[jJ]\=\>' display
    syn match   pythonFloat       '\<\d\%([_0-9]*\d\)\=\.\d\=\%([_0-9]*\d\)\=\%([eE][+-]\=\d\%([_0-9]*\d\)\=\)\=[jJ]\=' display
endif

"
" Builtin objects
"

if s:Enabled('g:python_highlight_builtin_objs')
    syn keyword pythonNone        None
    syn keyword pythonBoolean     True False
    syn keyword pythonSingleton   Ellipsis NotImplemented
    syn keyword pythonBuiltinObj  __debug__ __doc__ __file__ __name__ __package__
    syn keyword pythonBuiltinObj  __loader__ __spec__ __path__ __cached__
endif

"
" Builtin functions
"

if s:Enabled('g:python_highlight_builtin_funcs')
    let s:funcs_re = '__import__|abs|all|any|bin|callable|chr|classmethod|compile|complex|delattr|dir|divmod|enumerate|eval|filter|format|getattr|globals|hasattr|hash|help|hex|id|input|isinstance|issubclass|iter|len|locals|map|max|memoryview|min|next|oct|open|ord|pow|property|range|repr|reversed|round|setattr|slice|sorted|staticmethod|sum|super|type|vars|zip'

    if s:Python2Syntax()
        let s:funcs_re .= '|apply|basestring|buffer|cmp|coerce|execfile|file|intern|long|raw_input|reduce|reload|unichr|unicode|xrange'
        if s:Enabled('g:python_print_as_function')
            let s:funcs_re .= '|print'
        endif
    else
        let s:funcs_re .= '|ascii|breakpoint|exec|print'
    endif

    let s:funcs_re = 'syn match pythonBuiltinFunc ''\v\.@<!\zs<%(' . s:funcs_re . ')>'

    if !s:Enabled('g:python_highlight_builtin_funcs_kwarg')
        let s:funcs_re .= '\=@!'
    endif

    execute s:funcs_re . ''''
    unlet s:funcs_re
endif

"
" Builtin types
"

if s:Enabled('g:python_highlight_builtin_types')
    syn match pythonBuiltinType    '\v\.@<!<%(object|bool|int|float|tuple|str|list|dict|set|frozenset|bytearray|bytes)>'
endif


"
" Builtin exceptions and warnings
"

if s:Enabled('g:python_highlight_exceptions')
    let s:exs_re = 'BaseException|Exception|ArithmeticError|LookupError|EnvironmentError|AssertionError|AttributeError|BufferError|EOFError|FloatingPointError|GeneratorExit|IOError|ImportError|IndexError|KeyError|KeyboardInterrupt|MemoryError|NameError|NotImplementedError|OSError|OverflowError|ReferenceError|RuntimeError|StopIteration|SyntaxError|IndentationError|TabError|SystemError|SystemExit|TypeError|UnboundLocalError|UnicodeError|UnicodeEncodeError|UnicodeDecodeError|UnicodeTranslateError|ValueError|VMSError|WindowsError|ZeroDivisionError|Warning|UserWarning|BytesWarning|DeprecationWarning|PendingDeprecationWarning|SyntaxWarning|RuntimeWarning|FutureWarning|ImportWarning|UnicodeWarning'

    if s:Python2Syntax()
        let s:exs_re .= '|StandardError'
    else
        let s:exs_re .= '|BlockingIOError|ChildProcessError|ConnectionError|BrokenPipeError|ConnectionAbortedError|ConnectionRefusedError|ConnectionResetError|FileExistsError|FileNotFoundError|InterruptedError|IsADirectoryError|NotADirectoryError|PermissionError|ProcessLookupError|TimeoutError|StopAsyncIteration|ResourceWarning'
    endif

    execute 'syn match pythonExClass ''\v\.@<!\zs<%(' . s:exs_re . ')>'''
    unlet s:exs_re
endif

"
" Misc
"

if s:Enabled('g:python_slow_sync')
    syn sync minlines=2000
else
    " This is fast but code inside triple quoted strings screws it up. It
    " is impossible to fix because the only way to know if you are inside a
    " triple quoted string is to start from the beginning of the file.
    syn sync match pythonSync grouphere NONE '):$'
    syn sync maxlines=200
endif

if v:version >= 508 || !exists('did_python_syn_inits')
    if v:version <= 508
        let did_python_syn_inits = 1
        command -nargs=+ HiLink hi link <args>
    else
        command -nargs=+ HiLink hi def link <args>
    endif

    HiLink pythonStatement        Statement
    HiLink pythonRaiseFromStatement   Statement
    HiLink pythonImport           Include
    HiLink pythonFunction         Function
    HiLink pythonFunctionCall     Function
    HiLink pythonConditional      Conditional
    HiLink pythonRepeat           Repeat
    HiLink pythonException        Exception
    HiLink pythonOperator         Operator

    HiLink pythonDecorator        Define
    HiLink pythonDottedName       Function

    HiLink pythonComment          Comment
    if !s:Enabled('g:python_highlight_file_headers_as_comments')
        HiLink pythonCoding           Special
        HiLink pythonRun              Special
    endif
    HiLink pythonTodo             Todo

    HiLink pythonError            Error
    HiLink pythonIndentError      Error
    HiLink pythonSpaceError       Error

    HiLink pythonString           String
    HiLink pythonRawString        String
    HiLink pythonRawEscape        Special

    HiLink pythonUniEscape        Special
    HiLink pythonUniEscapeError   Error

    if s:Python2Syntax()
        HiLink pythonUniString          String
        HiLink pythonUniRawString       String
        HiLink pythonUniRawEscape       Special
        HiLink pythonUniRawEscapeError  Error
    else
        HiLink pythonBytes              String
        HiLink pythonRawBytes           String
        HiLink pythonBytesContent       String
        HiLink pythonBytesError         Error
        HiLink pythonBytesEscape        Special
        HiLink pythonBytesEscapeError   Error
        HiLink pythonFString            String
        HiLink pythonRawFString         String
        HiLink pythonStrInterpRegion    Special
    endif

    HiLink pythonStrFormatting    Special
    HiLink pythonStrFormat        Special
    HiLink pythonStrTemplate      Special

    HiLink pythonDocTest          Special
    HiLink pythonDocTest2         Special

    HiLink pythonNumber           Number
    HiLink pythonHexNumber        Number
    HiLink pythonOctNumber        Number
    HiLink pythonBinNumber        Number
    HiLink pythonFloat            Float
    HiLink pythonNumberError      Error
    HiLink pythonOctError         Error
    HiLink pythonHexError         Error
    HiLink pythonBinError         Error

    HiLink pythonBoolean          Boolean
    HiLink pythonNone             Constant
    HiLink pythonSingleton        Constant

    HiLink pythonBuiltinObj       Identifier
    HiLink pythonBuiltinFunc      Function
    HiLink pythonBuiltinType      Structure

    HiLink pythonExClass          Structure
    HiLink pythonClassVar         Identifier

    delcommand HiLink
endif

let b:current_syntax = 'python'