如此一來，當你在終端機輸入 `python` 時，系統會在 `/opt/custompython/bin` 中找到 Python 程式（最後一個目錄）並使用它。

////

//// tab | Windows

假設你安裝了 Python，並將其安裝在目錄 `C:\opt\custompython\bin` 中。

如果你選擇更新 `PATH` 環境變數（在 Python 安裝程式中，這個選項是名為 `Add Python x.xx to PATH` 的勾選框——譯者註），那麼安裝程式會將 `C:\opt\custompython\bin` 加入到 `PATH` 環境變數中。

```plaintext
C:\Program Files\Python312\Scripts;C:\Program Files\Python312;C:\Windows\System32;C:\opt\custompython\bin
```

    String decimal = "(?:\\d+#(?:\\.\\d*#)?|\\.\\d+#)";
    String completeDec = decimal + "(?:[eE][+-]?\\d+#)?[fFdD]?";
    String hex = "(?:[0-9a-fA-F]+#(?:\\.[0-9a-fA-F]*#)?|\\.[0-9a-fA-F]+#)";
    String completeHex = "0[xX]" + hex + "[pP][+-]?\\d+#[fFdD]?";
    String fpPattern = "[+-]?(?:NaN|Infinity|" + completeDec + "|" + completeHex + ")";
    fpPattern =
        fpPattern.replace(
            "#",
            "+"
            );

   * returned URI may be semantically different from this URL:
   *
   *  * Characters forbidden by URI like `[` and `|` will be escaped.
   *
   *  * Invalid percent-encoded sequences like `%xx` will be encoded like `%25xx`.
   *
   *  * Whitespace and control characters in the fragment will be stripped.
   *
   * These differences may have a significant consequence when the URI is interpreted by a

			t.Errorf("FieldsFunc(%q, unicode.IsSpace) = %v; want %v", tt.s, a, tt.a)
			continue
		}
	}
	pred := func(c rune) bool { return c == 'X' }
	var fieldsFuncTests = []FieldsTest{
		{"", []string{}},
		{"XX", []string{}},
		{"XXhiXXX", []string{"hi"}},
		{"aXXbXXXcX", []string{"a", "b", "c"}},
	}
	for _, tt := range fieldsFuncTests {
		b := []byte(tt.s)
		a := FieldsFunc(b, pred)

(as opposed to the three characters <code>...</code>) is not a token of the Go
language.
</p>

<p>
A link of the form [<a href="#Language_versions">Go 1.xx</a>] indicates that a described
language feature (or some aspect of it) was changed or added with language version 1.xx and
thus requires at minimum that language version to build.
For details, see the <a href="#Language_versions">linked section</a>
in the <a href="#Appendix">appendix</a>.

4?5?6?7?8?9?a?b?c?d?e?f?g?h?i?j?k?l?m?n?o?p?q?r?s?t?u?v?w?x?y!srab,?z???c!b?za9a0cbgm--nx??e!.&ca?em!an??gro?ics?lim?moc?nue?ofni?t&en?rops??ude?v&og?t???a??g!.&gro?hsadtob,lenap:.nomead,,oc?saak,t&en?ikcats,???i&a?v??k!.&gro?lim?moc?su,ten?ude?vog?xx,??m!.&drp?gro?lim?mo&c?n??oc?ude?vog??pk??n!.&clp,dtl,eman?gro?hcs?i!bom??l&im?oc,?m&oc?rif,?neg,ogn,ten?ude?vog?zib:.&gl,ld,no,o&c,g,??,?aw?i!b!mulp??car?d&art?dew??h&sif?tolc??k&iv?oo&b?c???ls?n&aelc?iart??p!pohs??re&enigne?tac??t&ad?ekram?hgil?l...

dy² + 1 vv := new(field.Element).Multiply(y2, d) vv = vv.Add(vv, feOne) // x = +√(u/v) xx, wasSquare := new(field.Element).SqrtRatio(u, vv) if wasSquare == 0 { return nil, errors.New("edwards25519: invalid point encoding") } // Select the negative square root if the sign bit is set. xxNeg := new(field.Element).Negate(xx) xx = xx.Select(xxNeg, xx, int(x[31]>>7)) v.x.Set(xx) v.y.Set(y) v.z.One() v.t.Multiply(xx, y) // xy = T / Z return v, nil } func copyFieldElement(buf *[32]byte, v *field.Element)...