Por exemplo, você poderia declarar que algo pode ser `str` ou `None`:

```python
from typing import Union


def say_hi(name: Union[str, None]):
        print(f"Hi {name}!")
```

O `typing` também tem um atalho para declarar que algo pode ser `None`, com `Optional`.

Aqui vai uma dica do meu ponto de vista bem subjetivo:

* 🚨 Evite usar `Optional[SomeType]`

et: eesti
eu: euskara
fa: فارسی
ff: Fulfulde
fi: suomi
fj: Vakaviti
fo: føroyskt
fr: français
fy: Frysk
ga: Gaeilge
gd: Gàidhlig
gl: galego
gu: ગુજરાતી
gv: Gaelg
ha: هَوُسَ
he: עברית
hi: हिन्दी
ho: Hiri Motu
hr: Hrvatski
ht: Kreyòl ayisyen
hu: magyar
hy: Հայերեն
hz: Otjiherero
ia: Interlingua
id: Bahasa Indonesia
ie: Interlingue
ig: Asụsụ Igbo
ii: ꆈꌠ꒿ Nuosuhxop
ik: Iñupiaq

		// to the Go version except the Go version sets a negative Devminor
		// just to force the GNU format.
		file: "testdata/gnu-not-utf8.tar",
		headers: []*Header{{
			Name:     "hi\x80\x81\x82\x83bye",
			Mode:     0644,
			Uid:      1000,
			Gid:      1000,
			ModTime:  time.Unix(0, 0),
			Typeflag: '0',
			Uname:    "rawr",
			Gname:    "dsnet",
			Format:   FormatGNU,
		}},

     * en_IE=en-ie<br>
     * es=es<br>
     * et=et<br>
     * eu=eu<br>
     * fa=fa<br>
     * fi=fi<br>
     * fr=fr<br>
     * gl=gl<br>
     * gu=gu<br>
     * he=he<br>
     * hi=hi<br>
     * hr=hr<br>
     * hu=hu<br>
     * hy=hy<br>
     * id=id<br>
     * it=it<br>
     * ja=ja<br>
     * ko=ko<br>
     * lt=lt<br>
     * lv=lv<br>
     * mk=mk<br>

com.cn
edu.cn
gov.cn
net.cn
org.cn
mil.cn
公司.cn
网络.cn
網絡.cn
// cn geographic names
ah.cn
bj.cn
cq.cn
fj.cn
gd.cn
gs.cn
gz.cn
gx.cn
ha.cn
hb.cn
he.cn
hi.cn
hl.cn
hn.cn
jl.cn
js.cn
jx.cn
ln.cn
nm.cn
nx.cn
qh.cn
sc.cn
sd.cn
sh.cn
sn.cn
sx.cn
tj.cn
xj.cn
xz.cn
yn.cn
zj.cn
hk.cn
mo.cn
tw.cn

hermes
herokuapp.com
herokussl.com
heroy.more-og-romsdal.no
heroy.nordland.no
herøy.møre-og-romsdal.no
herøy.nordland.no
heteml.net
heyflow.page
heyflow.site
hf.space
hi.cn
hi.us
hicam.net
hichiso.gifu.jp
hida.gifu.jp
hidaka.hokkaido.jp
hidaka.kochi.jp
hidaka.saitama.jp
hidaka.wakayama.jp
higashi.fukuoka.jp
higashi.fukushima.jp
higashi.okinawa.jp

const h = "foo" > "bar"    // h == true  (untyped boolean constant)
const j = true             // j == true  (untyped boolean constant)
const k = 'w' + 1          // k == 'x'   (untyped rune constant)
const l = "hi"             // l == "hi"  (untyped string constant)
const m = string(k)        // m == "x"   (type string)
const Σ = 1 - 0.707i       //            (untyped complex constant)

32E9          ; mapped                 ; 30CF          # 1.1  CIRCLED KATAKANA HA
32EA          ; mapped                 ; 30D2          # 1.1  CIRCLED KATAKANA HI
32EB          ; mapped                 ; 30D5          # 1.1  CIRCLED KATAKANA HU
32EC          ; mapped                 ; 30D8          # 1.1  CIRCLED KATAKANA HE

hermes
herokuapp.com
herokussl.com
heroy.more-og-romsdal.no
heroy.nordland.no
herøy.møre-og-romsdal.no
herøy.nordland.no
heteml.net
heyflow.page
heyflow.site
hf.space
hi.cn
hi.us
hicam.net
hichiso.gifu.jp
hida.gifu.jp
hidaka.hokkaido.jp
hidaka.kochi.jp
hidaka.saitama.jp
hidaka.wakayama.jp
higashi.fukuoka.jp
higashi.fukushima.jp
higashi.okinawa.jp

bfirebaseapp\u0010firewall-gateway\u0005fldrv\u000bforgeblocks\u000cframercanvas\nfreebox-os\u0009freeboxos\u0008freemyip\u0007from-ak\u0007from-al\u0007from-ar\u0007from-ca\u0007from-ct\u0007from-dc\u0007from-de\u0007from-fl\u0007from-ga\u0007from-hi\u0007from-ia\u0007from-id\u0007from-il\u0007from-in\u0007from-ks\u0007from-ky\u0007from-ma\u0007from-md\u0007from-mi\u0007from-mn\u0007from-mo\u0007from-ms\u0007from-mt\u0007from-nc\u0007from-nd\u0007from-ne\u0007from-nh\u0007from-nj\u0007from-nm\u...