data.setMethod("POST");
        data.setUrl("https://api.example.com/endpoint");
        data.setWeight(0.8f);

        // Verify all values
        assertEquals(Method.POST, data.getMethod());
        assertEquals("https://api.example.com/endpoint", data.getUrl());
        assertEquals(0.8f, data.getWeight(), 0.001f);

        // Change method
        data.setMethod(Method.HEAD);

        RequestData data = RequestDataBuilder.newRequestData().get().url("https://api.example.com/users/123").weight(0.8f).build();

        assertEquals(Method.GET, data.getMethod());
        assertEquals("https://api.example.com/users/123", data.getUrl());
        assertEquals(0.8f, data.getWeight(), 0.001f);
    }

    public void test_complexScenarioWithPost() {
        // Test complex scenario with POST method

00000b0 4f bb 3a 3f 75 f1 5d 7f 8f c2 68 67 77 8f 25 ff
00000c0 84 e2 93 2d ef a4 95 3d 71 4e 2c b9 b0 87 c3 be
00000d0 3d f8 a7 60 24 61 c5 ef ae 9e c8 6c 6d 4e 69 c8
00000e0 67 65 34 f8 37 76 2d 76 5c 54 f3 95 65 49 c7 0f
00000f0 18 71 4b 7e 5b 6a d1 79 47 61 41 b0 4e 2a 74 45
0000100 43 58 12 b2 5a a5 c6 7d 68 55 88 d4 98 75 18 6d
0000110 08 d1 1f 8f 5a 9e 96 ee 45 cf a4 84 4e 4b e8 50

eJgq8WLHxJZim9Ah93NlPyiqGPwtasub90qjZbkCgYEA35WK02o1wII3dvCNc7bM
M+3CoAglEdmXoF1uM/TdPUXKcbqoU3ymeXAGjYhOov3CMp/n0z0xqvLnMLPxmx+i
ny6DDYXyjlhO9WFogHYhwP636+mHJl8+PAsfDvqk0VRJZDmpdUDIv7DrSQGpRfRX
8f+2K4oIOlhv9RuRpI4wHwUCgYB8OjaMyn1NEsy4k2qBt4U+jhcdyEv1pbWqi/U1
qYm5FTgd44VvWVDHBGdQoMv9h28iFCJpzrU2Txv8B4y7v9Ujg+ZLIAFL7j0szt5K
wTZpWvO9Q0Qb98Q2VgL2lADRiyIlglrMJnoRfiisNfOfGKE6e+eGsxI5qUxmN5e5

</div>

////

当学习[虚拟环境](virtual-environments.md)时，这些信息将会很有用。

## 结论

通过这个教程，你应该对**环境变量**是什么以及如何在 Python 中使用它们有了基本的了解。

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">环境变量 - 维基百科</a> (<a href="https://en.wikipedia.org/wiki/Environment_variable" class="external-link" target="_blank">Wikipedia for Environment Variable</a>) 中了解更多关于它们的信息。

    assertEscaping(e, "%EF%BF%BF", '\uffff'); // xxx-1111,x-111111,x-11,1111
    assertUnicodeEscaping(e, "%F0%90%80%80", '\uD800', '\uDC00');
    assertUnicodeEscaping(e, "%F4%8F%BF%BF", '\uDBFF', '\uDFFF');

    // simple string tests
    assertEquals("", e.escape(""));
    assertEquals("safestring", e.escape("safestring"));
    assertEquals("embedded%00null", e.escape("embedded\0null"));

    // left-to-right mark
    assertThat(parse("http://h/\u200e").encodedPath).isEqualTo("/%E2%80%8E")
    // right-to-left mark
    assertThat(parse("http://h/\u200f").encodedPath).isEqualTo("/%E2%80%8F")
    // line separator
    assertThat(parse("http://h/\u2028").encodedPath).isEqualTo("/%E2%80%A8")
    // paragraph separator
    assertThat(parse("http://h/\u2029").encodedPath).isEqualTo("/%E2%80%A9")

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