DB.AutoMigrate(&Org{}, &EmbeddedAddress{}, &Country{})

	org := Org{
		PostalAddress:   EmbeddedAddress{Name: "a1", Country: &Country{Name: "c1"}},
		VisitingAddress: EmbeddedAddress{Name: "a2", Country: &Country{Name: "c2"}},
		Address:         &EmbeddedAddress{Name: "a3", Country: &Country{Name: "c3"}},
		NestedAddress: NestedAddress{
			EmbeddedAddress: EmbeddedAddress{Name: "a4", Country: &Country{Name: "c4"}},

```

</div>

////

當學習[虛擬環境](virtual-environments.md)時，這些資訊將會很有用。

## 結論

透過這個教學，你應該對**環境變數**是什麼以及如何在 Python 中使用它們有了基本的了解。

你也可以在<a href="https://zh.wikipedia.org/wiki/%E7%8E%AF%E5%A2%83%E5%8F%98%E9%87%8F" class="external-link" target="_blank">環境變數 - 維基百科</a> (<a href="https://en.wikipedia.org/wiki/Environment_variable" class="external-link" target="_blank">Wikipedia for Environment Variable</a>) 中了解更多關於它們的資訊。

	register["T1"] = riscv.REG_T1
	register["T2"] = riscv.REG_T2
	register["S0"] = riscv.REG_S0
	register["S1"] = riscv.REG_S1
	register["A0"] = riscv.REG_A0
	register["A1"] = riscv.REG_A1
	register["A2"] = riscv.REG_A2
	register["A3"] = riscv.REG_A3
	register["A4"] = riscv.REG_A4
	register["A5"] = riscv.REG_A5
	register["A6"] = riscv.REG_A6
	register["A7"] = riscv.REG_A7
	register["S2"] = riscv.REG_S2

0000210 85 e2 48 ad c3 d5 60 6f 7e 22 dd ef 09 49 7c 7f
0000220 3a 45 c3 71 b7 df f3 4c 63 fb b5 d9 31 5f 6e d6
0000230 24 1d a4 4a fe 32 a7 5c 16 48 5c 3e 08 6b 8a d3
0000240 25 1d a2 12 a5 59 24 ea 20 5f 52 6d ad 94 db 6b
0000250 94 b9 5d eb 4b a7 5c 44 bb 1e f2 3c 6b cf 52 c9
0000260 e9 e5 ba 06 b9 c4 e5 0a d0 00 0d d0 00 0d d0 00
0000270 0d d0 00 0d d0 00 0d d0 00 0d d0 00 0d d0 00 0d

</p>

<pre>
type (
	A1 = string
	A2 = A1
)

type (
	B1 string
	B2 B1
	B3 []B1
	B4 B3
)

func f[P any](x P) { … }
</pre>

<p>
The underlying type of <code>string</code>, <code>A1</code>, <code>A2</code>, <code>B1</code>,
and <code>B2</code> is <code>string</code>.

   *
   * {@snippet :
   * PeekingIterator<String> peekingIterator =
   *     Iterators.peekingIterator(Iterators.forArray("a", "b"));
   * String a1 = peekingIterator.peek(); // returns "a"
   * String a2 = peekingIterator.peek(); // also returns "a"
   * String a3 = peekingIterator.next(); // also returns "a"
   * }
   *
   * <p>Any structural changes to the underlying iteration (aside from those performed by the

, quickCheckConfig(1024)); err != nil { t.Error(err) } } func TestFeMul(t *testing.T) { asmLikeGeneric := func(a, b Element) bool { a1 := a a2 := a b1 := b b2 := b feMulGeneric(&a1, &a1, &b1) feMul(&a2, &a2, &b2) if a1 != a2 || b1 != b2 { t.Logf("got: %#v,\nexpected: %#v", a1, a2) t.Logf("got: %#v,\nexpected: %#v", b1, b2) } return a1 == a2 && isInBounds(&a2) && b1 == b2 && isInBounds(&b2) } if err := quick.Check(asmLikeGeneric, quickCheckConfig(1024)); err != nil { t.Error(err) } } func decodeHex(s...

, quickCheckConfig(1024)); err != nil { t.Error(err) } } func TestFeMul(t *testing.T) { asmLikeGeneric := func(a, b Element) bool { a1 := a a2 := a b1 := b b2 := b feMulGeneric(&a1, &a1, &b1) feMul(&a2, &a2, &b2) if a1 != a2 || b1 != b2 { t.Logf("got: %#v,\nexpected: %#v", a1, a2) t.Logf("got: %#v,\nexpected: %#v", b1, b2) } return a1 == a2 && isInBounds(&a2) && b1 == b2 && isInBounds(&b2) } if err := quick.Check(asmLikeGeneric, quickCheckConfig(1024)); err != nil { t.Error(err) } } func decodeHex(s...

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 ok1,ok2,ok3 "a word",b" invalid-crlfquoted.csv header1,header2,header3 ok1,ok2,ok3 "foo"bar" invalid-csv.csv header1,header2,header3 ok1,ok2,ok3 a""b,c invalid-oddquote.csv header1,header2,header3 ok1,ok2,ok3 """"""",b,c endswithhalfsep.csv a,b,c%!a2,b2,c2%...