## EXTENSION_TO_CONTENT_TYPE dict() -\> new empty dictionary `EXTENSION_TO_CONTENT_TYPE: dict[str, str] = {` `    ``"txt": ``"text/plain"``,` `    ``"htm"``: ``"text/html"``,` `    ``"html"``: ``"text/html"``,` `    ``"css"``: ``"text/css"``,` `    ``"csv"``: ``"text/csv"``,` `    ``"tsv"``: ``"text/tab-separated-values"``,` `    ``"js"``: ``"text/javascript"``,` `    ``"mjs"``: ``"text/javascript"``,` `    ``"json"``: ``"application/json"``,` `    ``"map"``: ``"application/json"``,` `    ``"xml"``: ``"application/xml"``,` `    ``"jpg"``: ``"image/jpeg"``,` `    ``"jpeg"``: ``"image/jpeg"``,` `    ``"png"``: ``"image/png"``,` `    ``"gif"``: ``"image/gif"``,` `    ``"bmp"``: ``"image/bmp"``,` `    ``"webp"``: ``"image/webp"``,` `    ``"avif"``: ``"image/avif"``,` `    ``"ico"``: ``"image/vnd.microsoft.icon"``,` `    ``"svg"``: ``"image/svg+xml"``,` `    ``"tif"``: ``"image/tiff"``,` `    ``"tiff"``: ``"image/tiff"``,` `    ``"heic"``: ``"image/heic"``,` `    ``"heif"``: ``"image/heif"``,` `    ``"jpe"``: ``"image/jpeg"``,` `    ``"ief"``: ``"image/ief"``,` `    ``"ras"``: ``"image/x-cmu-raster"``,` `    ``"pnm"``: ``"image/x-portable-anymap"``,` `    ``"pbm"``: ``"image/x-portable-bitmap"``,` `    ``"pgm"``: ``"image/x-portable-graymap"``,` `    ``"ppm"``: ``"image/x-portable-pixmap"``,` `    ``"rgb"``: ``"image/x-rgb"``,` `    ``"xbm"``: ``"image/x-xbitmap"``,` `    ``"xpm"``: ``"image/x-xpixmap"``,` `    ``"xwd"``: ``"image/x-xwindowdump"``,` `    ``"cr2"``: ``"image/x-canon-cr2"``,` `    ``"cr3"``: ``"image/x-canon-cr3"``,` `    ``"nef"``: ``"image/x-nikon-nef"``,` `    ``"nrw"``: ``"image/x-nikon-nrw"``,` `    ``"arw"``: ``"image/x-sony-arw"``,` `    ``"srf"``: ``"image/x-sony-srf"``,` `    ``"sr2"``: ``"image/x-sony-sr2"``,` `    ``"dng"``: ``"image/x-adobe-dng"``,` `    ``"orf"``: ``"image/x-olympus-orf"``,` `    ``"rw2"``: ``"image/x-panasonic-rw2"``,` `    ``"pef"``: ``"image/x-pentax-pef"``,` `    ``"raf"``: ``"image/x-fuji-raf"``,` `    ``"raw"``: ``"image/x-raw"``,` `    ``"mp3"``: ``"audio/mpeg"``,` `    ``"ogg"``: ``"audio/ogg"``,` `    ``"wav"``: ``"audio/wav"``,` `    ``"aac"``: ``"audio/aac"``,` `    ``"flac"``: ``"audio/flac"``,` `    ``"m4a"``: ``"audio/mp4"``,` `    ``"weba"``: ``"audio/webm"``,` `    ``"adts"``: ``"audio/aac"``,` `    ``"loas"``: ``"audio/aac"``,` `    ``"mp2"``: ``"audio/mpeg"``,` `    ``"opus"``: ``"audio/opus"``,` `    ``"aif"``: ``"audio/x-aiff"``,` `    ``"aifc"``: ``"audio/x-aiff"``,` `    ``"aiff"``: ``"audio/x-aiff"``,` `    ``"au"``: ``"audio/basic"``,` `    ``"snd"``: ``"audio/basic"``,` `    ``"ra"``: ``"audio/x-pn-realaudio"``,` `    ``"midi"``: ``"audio/midi"``,` `    ``"mid"``: ``"audio/midi"``,` `    ``"ape"``: ``"audio/x-ape"``,` `    ``"wma"``: ``"audio/x-ms-wma"``,` `    ``"alac"``: ``"audio/x-alac"``,` `    ``"dsd"``: ``"audio/dsd"``,` `    ``"dsf"``: ``"audio/x-dsf"``,` `    ``"mp4"``: ``"video/mp4"``,` `    ``"m4v"``: ``"video/mp4"``,` `    ``"mov"``: ``"video/quicktime"``,` `    ``"avi"``: ``"video/x-msvideo"``,` `    ``"wmv"``: ``"video/x-ms-wmv"``,` `    ``"mpg"``: ``"video/mpeg"``,` `    ``"mpeg"``: ``"video/mpeg"``,` `    ``"ogv"``: ``"video/ogg"``,` `    ``"webm"``: ``"video/webm"``,` `    ``"m1v"``: ``"video/mpeg"``,` `    ``"mpa"``: ``"video/mpeg"``,` `    ``"mpe"``: ``"video/mpeg"``,` `    ``"qt"``: ``"video/quicktime"``,` `    ``"movie"``: ``"video/x-sgi-movie"``,` `    ``"mkv"``: ``"video/x-matroska"``,` `    ``"flv"``: ``"video/x-flv"``,` `    ``"m2ts"``: ``"video/mp2t"``,` `    ``"mts"``: ``"video/mp2t"``,` `    ``"vob"``: ``"video/mpeg"``,` `    ``"f4v"``: ``"video/x-f4v"``,` `    ``"3gp"``: ``"audio/3gpp"``,` `    ``"3gpp"``: ``"audio/3gpp"``,` `    ``"3g2"``: ``"audio/3gpp2"``,` `    ``"3gpp2"``: ``"audio/3gpp2"``,` `    ``"pdf"``: ``"application/pdf"``,` `    ``"zip"``: ``"application/zip"``,` `    ``"gz"``: ``"application/gzip"``,` `    ``"tgz"``: ``"application/gzip"``,` `    ``"tar"``: ``"application/x-tar"``,` `    ``"7z"``: ``"application/x-7z-compressed"``,` `    ``"rar"``: ``"application/vnd.rar"``,` `    ``"bz2"``: ``"application/x-bzip2"``,` `    ``"tbz"``: ``"application/x-bzip2"``,` `    ``"tbz2"``: ``"application/x-bzip2"``,` `    ``"xz"``: ``"application/x-xz"``,` `    ``"txz"``: ``"application/x-xz"``,` `    ``"lz"``: ``"application/x-lzip"``,` `    ``"lzma"``: ``"application/x-lzma"``,` `    ``"zst"``: ``"application/zstd"``,` `    ``"zstd"``: ``"application/zstd"``,` `    ``"br"``: ``"application/x-br"``,` `    ``"iso"``: ``"application/x-iso9660-image"``,` `    ``"dmg"``: ``"application/x-apple-diskimage"``,` `    ``"img"``: ``"application/x-raw-disk-image"``,` `    ``"cab"``: ``"application/vnd.ms-cab-compressed"``,` `    ``"msi"``: ``"application/x-msi"``,` `    ``"bin"``: ``"application/octet-stream"``,` `    ``"a"``: ``"application/octet-stream"``,` `    ``"so"``: ``"application/octet-stream"``,` `    ``"o"``: ``"application/octet-stream"``,` `    ``"obj"``: ``"model/obj"``,` `    ``"dll"``: ``"application/x-msdownload"``,` `    ``"exe"``: ``"application/x-msdownload"``,` `    ``"bcpio"``: ``"application/x-bcpio"``,` `    ``"cpio"``: ``"application/x-cpio"``,` `    ``"shar"``: ``"application/x-shar"``,` `    ``"sv4cpio"``: ``"application/x-sv4cpio"``,` `    ``"sv4crc"``: ``"application/x-sv4crc"``,` `    ``"ustar"``: ``"application/x-ustar"``,` `    ``"src"``: ``"application/x-wais-source"``,` `    ``"doc"``: ``"application/msword"``,` `    ``"xls"``: ``"application/vnd.ms-excel"``,` `    ``"ppt"``: ``"application/vnd.ms-powerpoint"``,` `    ``"docx"``: ``"application/vnd.openxmlformats-officedocument.wordprocessingml.document"``,` `    ``"xlsx"``: ``"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"``,` `    ``"pptx"``: ``"application/vnd.openxmlformats-officedocument.presentationml.presentation"``,` `    ``"dot"``: ``"application/msword"``,` `    ``"wiz"``: ``"application/msword"``,` `    ``"xlb"``: ``"application/vnd.ms-excel"``,` `    ``"pot"``: ``"application/vnd.ms-powerpoint"``,` `    ``"ppa"``: ``"application/vnd.ms-powerpoint"``,` `    ``"pps"``: ``"application/vnd.ms-powerpoint"``,` `    ``"pwz"``: ``"application/vnd.ms-powerpoint"``,` `    ``"webmanifest"``: ``"application/manifest+json"``,` `    ``"nq"``: ``"application/n-quads"``,` `    ``"nt"``: ``"application/n-triples"``,` `    ``"oda"``: ``"application/oda"``,` `    ``"p7c"``: ``"application/pkcs7-mime"``,` `    ``"ps"``: ``"application/postscript"``,` `    ``"ai"``: ``"application/postscript"``,` `    ``"eps"``: ``"application/postscript"``,` `    ``"trig"``: ``"application/trig"``,` `    ``"m3u"``: ``"application/vnd.apple.mpegurl"``,` `    ``"m3u8"``: ``"application/vnd.apple.mpegurl"``,` `    ``"wasm"``: ``"application/wasm"``,` `    ``"csh"``: ``"application/x-csh"``,` `    ``"dvi"``: ``"application/x-dvi"``,` `    ``"gtar"``: ``"application/x-gtar"``,` `    ``"hdf"``: ``"application/x-hdf"``,` `    ``"h5"``: ``"application/x-hdf5"``,` `    ``"latex"``: ``"application/x-latex"``,` `    ``"mif"``: ``"application/x-mif"``,` `    ``"cdf"``: ``"application/x-netcdf"``,` `    ``"nc"``: ``"application/x-netcdf"``,` `    ``"p12"``: ``"application/x-pkcs12"``,` `    ``"pfx"``: ``"application/x-pkcs12"``,` `    ``"ram"``: ``"application/x-pn-realaudio"``,` `    ``"pyc"``: ``"application/x-python-code"``,` `    ``"pyo"``: ``"application/x-python-code"``,` `    ``"swf"``: ``"application/x-shockwave-flash"``,` `    ``"tcl"``: ``"application/x-tcl"``,` `    ``"tex"``: ``"application/x-tex"``,` `    ``"texi"``: ``"application/x-texinfo"``,` `    ``"texinfo"``: ``"application/x-texinfo"``,` `    ``"roff"``: ``"application/x-troff"``,` `    ``"t"``: ``"application/x-troff"``,` `    ``"tr"``: ``"application/x-troff"``,` `    ``"man"``: ``"application/x-troff-man"``,` `    ``"me"``: ``"application/x-troff-me"``,` `    ``"ms"``: ``"application/x-troff-ms"``,` `    ``"xsl"``: ``"application/xml"``,` `    ``"rdf"``: ``"application/xml"``,` `    ``"wsdl"``: ``"application/xml"``,` `    ``"xpdl"``: ``"application/xml"``,` `    ``"odt"``: ``"application/vnd.oasis.opendocument.text"``,` `    ``"ods"``: ``"application/vnd.oasis.opendocument.spreadsheet"``,` `    ``"odp"``: ``"application/vnd.oasis.opendocument.presentation"``,` `    ``"odg"``: ``"application/vnd.oasis.opendocument.graphics"``,` `    ``"otf"``: ``"font/otf"``,` `    ``"ttf"``: ``"font/ttf"``,` `    ``"woff"``: ``"font/woff"``,` `    ``"woff2"``: ``"font/woff2"``,` `    ``"gltf"``: ``"model/gltf+json"``,` `    ``"glb"``: ``"model/gltf-binary"``,` `    ``"stl"``: ``"model/stl"``,` `    ``"sh"``: ``"application/x-sh"``,` `    ``"php"``: ``"application/x-httpd-php"``,` `    ``"py"``: ``"text/x-python"``,` `    ``"c"``: ``"text/plain"``,` `    ``"h"``: ``"text/plain"``,` `    ``"ksh"``: ``"text/plain"``,` `    ``"pl"``: ``"text/plain"``,` `    ``"bat"``: ``"text/plain"``,` `    ``"rs"``: ``"text/x-rust"``,` `    ``"go"``: ``"text/x-go"``,` `    ``"swift"``: ``"text/x-swift"``,` `    ``"kt"``: ``"text/x-kotlin"``,` `    ``"kts"``: ``"text/x-kotlin"``,` `    ``"java"``: ``"text/x-java-source"``,` `    ``"scala"``: ``"text/x-scala"``,` `    ``"rb"``: ``"text/x-ruby"``,` `    ``"ts"``: ``"text/typescript"``,` `    ``"tsx"``: ``"text/tsx"``,` `    ``"jsx"``: ``"text/jsx"``,` `    ``"vue"``: ``"text/x-vue"``,` `    ``"dart"``: ``"text/x-dart"``,` `    ``"lua"``: ``"text/x-lua"``,` `    ``"r"``: ``"text/x-r"``,` `    ``"jl"``: ``"text/x-julia"``,` `    ``"f90"``: ``"text/x-fortran"``,` `    ``"f95"``: ``"text/x-fortran"``,` `    ``"f03"``: ``"text/x-fortran"``,` `    ``"m"``: ``"text/x-objcsrc"``,` `    ``"cs"``: ``"text/x-csharp"``,` `    ``"cpp"``: ``"text/x-c++src"``,` `    ``"cxx"``: ``"text/x-c++src"``,` `    ``"cc"``: ``"text/x-c++src"``,` `    ``"hpp"``: ``"text/x-c++hdr"``,` `    ``"hxx"``: ``"text/x-c++hdr"``,` `    ``"hh"``: ``"text/x-c++hdr"``,` `    ``"asm"``: ``"text/x-asm"``,` `    ``"s"``: ``"text/x-asm"``,` `    ``"apk"``: ``"application/vnd.android.package-archive"``,` `    ``"deb"``: ``"application/x-debian-package"``,` `    ``"rpm"``: ``"application/x-rpm"``,` `    ``"eml"``: ``"message/rfc822"``,` `    ``"mht"``: ``"message/rfc822"``,` `    ``"mhtml"``: ``"message/rfc822"``,` `    ``"nws"``: ``"message/rfc822"``,` `    ``"md"``: ``"text/markdown"``,` `    ``"markdown"``: ``"text/markdown"``,` `    ``"n3"``: ``"text/n3"``,` `    ``"rtx"``: ``"text/richtext"``,` `    ``"rtf"``: ``"text/rtf"``,` `    ``"srt"``: ``"text/plain"``,` `    ``"vtt"``: ``"text/vtt"``,` `    ``"etx"``: ``"text/x-setext"``,` `    ``"sgm"``: ``"text/x-sgml"``,` `    ``"sgml"``: ``"text/x-sgml"``,` `    ``"vcf"``: ``"text/x-vcard"``,` `    ``"epub"``: ``"application/epub+zip"``,` `    ``"ini"``: ``"text/plain"``,` `    ``"conf"``: ``"text/plain"``,` `    ``"cfg"``: ``"text/plain"``,` `    ``"config"``: ``"text/plain"``,` `    ``"properties"``: ``"text/plain"``,` `    ``"env"``: ``"text/plain"``,` `    ``"editorconfig"``: ``"text/plain"``,` `    ``"gitignore"``: ``"text/plain"``,` `    ``"gitattributes"``: ``"text/plain"``,` `    ``"dockerignore"``: ``"text/plain"``,` `    ``"npmrc"``: ``"text/plain"``,` `    ``"yarnrc"``: ``"text/plain"``,` `    ``"babelrc"``: ``"application/json"``,` `    ``"eslintrc"``: ``"application/json"``,` `    ``"prettierrc"``: ``"application/json"``,` `    ``"parquet"``: ``"application/vnd.apache.parquet"``,` `    ``"ipynb"``: ``"application/x-ipynb+json"``,` `    ``"pkl"``: ``"application/octet-stream"``,` `    ``"pickle"``: ``"application/octet-stream"``,` `    ``"npy"``: ``"application/octet-stream"``,` `    ``"npz"``: ``"application/zip"``,` `    ``"arrow"``: ``"application/vnd.apache.arrow.file"``,` `    ``"feather"``: ``"application/vnd.apache.arrow.file"``,` `    ``"hdf5"``: ``"application/x-hdf5"``,` `    ``"yaml"``: ``"application/yaml"``,` `    ``"yml"``: ``"application/yaml"``,` `    ``"toml"``: ``"application/toml"``,` `    ``"proto"``: ``"text/plain"``,` `    ``"pb"``: ``"application/octet-stream"``,` `    ``"avro"``: ``"application/avro"``,` `    ``"rda"``: ``"application/octet-stream"``,` `    ``"rdata"``: ``"application/octet-stream"``,` `    ``"rds"``: ``"application/octet-stream"``,` `    ``"dta"``: ``"application/x-stata-dta"``,` `    ``"sas"``: ``"text/x-sas"``,` `    ``"sas7bdat"``: ``"application/x-sas-data"``,` `    ``"sql"``: ``"application/sql"``,` `    ``"sav"``: ``"application/x-spss-sav"``,` `    ``"mat"``: ``"application/x-matlab-data"``,` `    ``"sqlite"``: ``"application/vnd.sqlite3"``,` `    ``"sqlite3"``: ``"application/vnd.sqlite3"``,` `    ``"db"``: ``"application/vnd.sqlite3"``,` `    ``"parq"``: ``"application/vnd.apache.parquet"``,` `    ``"dockerfile"``: ``"text/plain"``,` `    ``"tf"``: ``"text/plain"``,` `    ``"tfvars"``: ``"text/plain"``,` `    ``"nomad"``: ``"text/plain"``,` `    ``"hcl"``: ``"text/plain"``,` `    ``"kubeconfig"``: ``"application/yaml"``,` `    ``"gradle"``: ``"text/plain"``,` `    ``"nuspec"``: ``"application/xml"``,` `    ``"gemspec"``: ``"text/x-ruby"``,` `    ``"podspec"``: ``"text/x-ruby"``,` `    ``"whl"``: ``"application/zip"``,` `    ``"egg"``: ``"application/zip"``,` `    ``"adoc"``: ``"text/asciidoc"``,` `    ``"asciidoc"``: ``"text/asciidoc"``,` `    ``"org"``: ``"text/org"``,` `    ``"bib"``: ``"text/x-bibtex"``,` `    ``"wiki"``: ``"text/plain"``,` `    ``"rst"``: ``"text/x-rst"``,` `    ``"sol"``: ``"text/x-solidity"``,` `    ``"vy"``: ``"text/x-vyper"``,` `    ``"psd"``: ``"image/vnd.adobe.photoshop"``,` `    ``"psb"``: ``"image/vnd.adobe.photoshop"``,` `    ``"indd"``: ``"application/x-indesign"``,` `    ``"idml"``: ``"application/x-indesign"``,` `    ``"prproj"``: ``"application/x-premiere"``,` `    ``"aep"``: ``"application/x-aftereffects"``,` `    ``"xd"``: ``"application/x-xd"``,` `    ``"dwg"``: ``"application/acad"``,` `    ``"dxf"``: ``"application/dxf"``,` `    ``"skp"``: ``"application/vnd.sketchup.skp"``,` `    ``"blend"``: ``"application/x-blender"``,` `    ``"fbx"``: ``"application/octet-stream"``,` `    ``"step"``: ``"application/step"``,` `    ``"stp"``: ``"application/step"``,` `    ``"iges"``: ``"application/iges"``,` `    ``"igs"``: ``"application/iges"``,` `    ``"3ds"``: ``"application/x-3ds"``,` `    ``"max"``: ``"application/x-3dsmax"``,` `    ``"c4d"``: ``"application/x-cinema4d"``,` `    ``"accdb"``: ``"application/msaccess"``,` `    ``"mdb"``: ``"application/msaccess"``,` `    ``"odb"``: ``"application/vnd.oasis.opendocument.database"``,` `    ``"frm"``: ``"application/octet-stream"``,` `    ``"myd"``: ``"application/octet-stream"``,` `    ``"myi"``: ``"application/octet-stream"``,` `    ``"ibd"``: ``"application/octet-stream"``,` `    ``"unity"``: ``"text/plain"``,` `    ``"unitypackage"``: ``"application/gzip"``,` `    ``"uasset"``: ``"application/octet-stream"``,` `    ``"pak"``: ``"application/octet-stream"``,` `    ``"bsp"``: ``"application/octet-stream"``,` `    ``"log"``: ``"text/plain"``,` `    ``"out"``: ``"text/plain"``,` `    ``"tmp"``: ``"application/octet-stream"``,` `    ``"bak"``: ``"application/octet-stream"``,` `    ``"backup"``: ``"application/octet-stream"``,` `    ``"cache"``: ``"application/octet-stream"``,` `    ``"pid"``: ``"text/plain"``,` `    ``"lock"``: ``"text/plain"``,` `    ``"fits"``: ``"application/fits"``,` `    ``"fit"``: ``"application/fits"``,` `    ``"nii"``: ``"application/x-nifti"``,` `    ``"dcm"``: ``"application/dicom"``,` `    ``"pdb"``: ``"chemical/x-pdb"``,` `    ``"ssa"``: ``"text/x-ssa"``,` `    ``"ass"``: ``"text/x-ssa"``,` `    ``"sub"``: ``"text/x-microdvd"``,` `    ``"idx"``: ``"application/octet-stream"``,` `}` dict(mapping) -\> new dictionary initialized from a mapping object's (key, value) pairs dict(iterable) -\> new dictionary initialized as if via: d = {} for k, v in iterable: d\[k\] = v dict(\*\*kwargs) -\> new dictionary initialized with the name=value pairs in the keyword argument list. For example: dict(one=1, two=2)