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+# http://python.org
+# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
+
+# Detection
+# ‾‾‾‾‾‾‾‾‾
+
+hook global BufCreate .*[.](py) %{
+    set-option buffer filetype python
+}
+
+# Initialization
+# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾
+
+hook global WinSetOption filetype=python %{
+    require-module python
+
+    set-option window static_words %opt{python_static_words}
+
+    hook window InsertChar \n -group python-insert python-insert-on-new-line
+    hook window InsertChar \n -group python-indent python-indent-on-new-line
+    # cleanup trailing whitespaces on current line insert end
+    hook window ModeChange pop:insert:.* -group python-trim-indent %{ try %{ execute-keys -draft <semicolon> x s ^\h+$ <ret> d } }
+    hook -once -always window WinSetOption filetype=.* %{ remove-hooks window python-.+ }
+}
+
+hook -group python-highlight global WinSetOption filetype=python %{
+    add-highlighter window/python ref python
+    hook -once -always window WinSetOption filetype=.* %{ remove-highlighter window/python }
+}
+
+provide-module python %§
+
+# Highlighters & Completion
+# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
+
+add-highlighter shared/python regions
+add-highlighter shared/python/code default-region group
+add-highlighter shared/python/docstring     region -match-capture ^\h*("""|''') (?<!\\)(?:\\\\)*("""|''') regions
+
+add-highlighter shared/python/documentation region '##'  '$'              fill documentation
+add-highlighter shared/python/comment       region '#'   '$'              fill comment
+
+# String interpolation
+add-highlighter shared/python/f_triple_string region -match-capture [fF]("""|''') (?<!\\)(?:\\\\)*("""|''') group
+add-highlighter shared/python/f_triple_string/ fill string
+add-highlighter shared/python/f_triple_string/ regex \{.*?\} 0:value
+
+add-highlighter shared/python/f_double_string region '[fF]"'   (?<!\\)(\\\\)*" group
+add-highlighter shared/python/f_double_string/ fill string
+add-highlighter shared/python/f_double_string/ regex \{.*?\} 0:value
+
+add-highlighter shared/python/f_single_string region "[fF]'"   (?<!\\)(\\\\)*' group
+add-highlighter shared/python/f_single_string/ fill string
+add-highlighter shared/python/f_single_string/ regex \{.*?\} 0:value
+
+
+# Regular string
+add-highlighter shared/python/triple_string region -match-capture ("""|''') (?<!\\)(?:\\\\)*("""|''') fill string
+add-highlighter shared/python/double_string region '"'   (?<!\\)(\\\\)*" fill string
+add-highlighter shared/python/single_string region "'"   (?<!\\)(\\\\)*' fill string
+
+# Integer formats
+add-highlighter shared/python/code/ regex '(?i)\b0b[01]+l?\b' 0:value
+add-highlighter shared/python/code/ regex '(?i)\b0x[\da-f]+l?\b' 0:value
+add-highlighter shared/python/code/ regex '(?i)\b0o?[0-7]+l?\b' 0:value
+add-highlighter shared/python/code/ regex '(?i)\b([1-9]\d*|0)l?\b' 0:value
+# Float formats
+add-highlighter shared/python/code/ regex '\b\d+[eE][+-]?\d+\b' 0:value
+add-highlighter shared/python/code/ regex '(\b\d+)?\.\d+\b' 0:value
+add-highlighter shared/python/code/ regex '\b\d+\.' 0:value
+# Imaginary formats
+add-highlighter shared/python/code/ regex '\b\d+\+\d+[jJ]\b' 0:value
+
+add-highlighter shared/python/docstring/ default-region fill documentation
+add-highlighter shared/python/docstring/ region '(>>>|\.\.\.) \K'    (?=''')|(?=""") ref python
+
+evaluate-commands %sh{
+    # Grammar
+    values="True False None self inf"
+    meta="import from"
+
+    # attributes and methods list based on https://docs.python.org/3/reference/datamodel.html
+    attributes="__annotations__ __closure__ __code__ __defaults__ __dict__ __doc__
+                __globals__ __kwdefaults__ __module__ __name__ __qualname__"
+    methods="__abs__ __add__ __aenter__ __aexit__ __aiter__ __and__ __anext__
+             __await__ __bool__ __bytes__ __call__ __complex__ __contains__
+             __del__ __delattr__ __delete__ __delitem__ __dir__ __divmod__
+             __enter__ __eq__ __exit__ __float__ __floordiv__ __format__
+             __ge__ __get__ __getattr__ __getattribute__ __getitem__
+             __gt__ __hash__ __iadd__ __iand__ __ifloordiv__ __ilshift__
+             __imatmul__ __imod__ __imul__ __index__ __init__
+             __init_subclass__ __int__ __invert__ __ior__ __ipow__
+             __irshift__ __isub__ __iter__ __itruediv__ __ixor__ __le__
+             __len__ __length_hint__ __lshift__ __lt__ __matmul__
+             __missing__ __mod__ __mul__ __ne__ __neg__ __new__ __or__
+             __pos__ __pow__ __radd__ __rand__ __rdivmod__ __repr__
+             __reversed__ __rfloordiv__ __rlshift__ __rmatmul__ __rmod__
+             __rmul__ __ror__ __round__ __rpow__ __rrshift__ __rshift__
+             __rsub__ __rtruediv__ __rxor__ __set__ __setattr__
+             __setitem__ __set_name__ __slots__ __str__ __sub__
+             __truediv__ __xor__"
+
+    # built-in exceptions https://docs.python.org/3/library/exceptions.html
+    exceptions="ArithmeticError AssertionError AttributeError BaseException BlockingIOError
+                BrokenPipeError BufferError BytesWarning ChildProcessError
+                ConnectionAbortedError ConnectionError ConnectionRefusedError
+                ConnectionResetError DeprecationWarning EOFError Exception
+                FileExistsError FileNotFoundError FloatingPointError FutureWarning
+                GeneratorExit ImportError ImportWarning IndentationError
+                IndexError InterruptedError IsADirectoryError KeyboardInterrupt
+                KeyError LookupError MemoryError ModuleNotFoundError NameError
+                NotADirectoryError NotImplementedError OSError OverflowError
+                PendingDeprecationWarning PermissionError ProcessLookupError
+                RecursionError ReferenceError ResourceWarning RuntimeError
+                RuntimeWarning StopAsyncIteration StopIteration SyntaxError
+                SyntaxWarning SystemError SystemExit TabError TimeoutError TypeError
+                UnboundLocalError UnicodeDecodeError UnicodeEncodeError UnicodeError
+                UnicodeTranslateError UnicodeWarning UserWarning ValueError Warning
+                ZeroDivisionError"
+
+    # Keyword list is collected using `keyword.kwlist` from `keyword`
+    keywords="and as assert async await break class continue def del elif else except exec
+              finally for global if in is lambda nonlocal not or pass print
+              raise return try while with yield"
+
+    # Collected from `keyword.softkwlist`
+    soft_keywords="_ case match"
+
+    types="bool buffer bytearray bytes complex dict file float frozenset int
+           list long memoryview object set str tuple unicode xrange"
+
+    functions="abs all any ascii bin breakpoint callable chr classmethod compile complex
+               delattr dict dir divmod enumerate eval exec filter
+               format frozenset getattr globals hasattr hash help
+               hex id __import__ input isinstance issubclass iter
+               len locals map max memoryview min next oct open ord
+               pow print property range repr reversed round
+               setattr slice sorted staticmethod sum super type vars zip"
+
+    join() { sep=$2; eval set -- $1; IFS="$sep"; echo "$*"; }
+
+    # Add the language's grammar to the static completion list
+    printf %s\\n "declare-option str-list python_static_words $(join "${values} ${meta} ${attributes} ${methods} ${exceptions} ${keywords} ${types} ${functions}" ' ')"
+
+    # Highlight keywords
+    printf %s "
+        add-highlighter shared/python/code/ regex '\b($(join "${values}" '|'))\b' 0:value
+        add-highlighter shared/python/code/ regex '\b($(join "${meta}" '|'))\b' 0:meta
+        add-highlighter shared/python/code/ regex '\b($(join "${attributes}" '|'))\b' 0:attribute
+        add-highlighter shared/python/code/ regex '\bdef\s+($(join "${methods}" '|'))\b' 1:function
+        add-highlighter shared/python/code/ regex '\b($(join "${exceptions}" '|'))\b' 0:function
+        add-highlighter shared/python/code/ regex '\b($(join "${keywords} ${soft_keywords}" '|'))\b' 0:keyword
+        add-highlighter shared/python/code/ regex '\b($(join "${functions}" '|'))\b\(' 1:builtin
+        add-highlighter shared/python/code/ regex '\b($(join "${types}" '|'))\b' 0:type
+        add-highlighter shared/python/code/ regex '^\h*(@[\w_.]+))' 1:attribute
+    "
+}
+
+add-highlighter shared/python/code/ regex (?<=[\w\s\d\)\]'"_])(<=|<<|>>|>=|<>?|>|!=|==|\||\^|&|\+|-|\*\*?|//?|%|~) 0:operator
+add-highlighter shared/python/code/ regex (?<=[\w\s\d'"_])((?<![=<>!]):?=(?![=])|[+*-]=) 0:builtin
+add-highlighter shared/python/code/ regex ^\h*(?:from|import)\h+(\S+) 1:module
+
+# Commands
+# ‾‾‾‾‾‾‾‾
+
+define-command -hidden python-insert-on-new-line %{ evaluate-commands -itersel -draft %{
+    execute-keys <semicolon>
+    try %{
+        evaluate-commands -draft -save-regs '/"' %{
+            # copy the commenting prefix
+            execute-keys -save-regs '' k x1s^\h*(#+\h*)<ret> y
+            try %{
+                # if the previous comment isn't empty, create a new one
+                execute-keys x<a-K>^\h*#+\h*$<ret> jxs^\h*<ret>P
+            } catch %{
+                # if there is no text in the previous comment, remove it completely
+                execute-keys d
+            }
+        }
+
+        # trim trailing whitespace on the previous line
+        try %{ execute-keys -draft k x s\h+$<ret> d }
+    }
+} }
+
+define-command -hidden python-indent-on-new-line %<
+    evaluate-commands -draft -itersel %<
+        # preserve previous line indent
+        try %{ execute-keys -draft <semicolon> K <a-&> }
+        # cleanup trailing whitespaces from previous line
+        try %{ execute-keys -draft k x s \h+$ <ret> d }
+        # indent after line ending with :
+        try %{ execute-keys -draft , k x <a-k> :$ <ret> <a-K> ^\h*# <ret> j <a-gt> }
+        # deindent closing brace/bracket when after cursor (for arrays and dictionaries)
+        try %< execute-keys -draft x <a-k> ^\h*[}\]] <ret> gh / [}\]] <ret> m <a-S> 1<a-&> >
+    >
+>
+
+§