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# Third-Party Modules

These modules implement various extra features, that may not be ready for prime time or that require optional third-party dependencies.

- Google App Engine
  - `AppEngineManager`
    - `AppEngineManager.urlopen()`
  - `AppEnginePlatformError`
  - `AppEnginePlatformWarning`
- NTLM Authentication
  - `NTLMConnectionPool`
    - `NTLMConnectionPool.scheme`
    - `NTLMConnectionPool.urlopen()`
- PyOpenSSL
  - `extract_from_urllib3()`
  - `inject_into_urllib3()`
- macOS SecureTransport
- SOCKS Proxies
  - `SOCKSConnection`
  - `SOCKSHTTPConnectionPool`
    - `SOCKSHTTPConnectionPool.ConnectionCls`
  - `SOCKSHTTPSConnection`
  - `SOCKSHTTPSConnectionPool`
    - `SOCKSHTTPSConnectionPool.ConnectionCls`
  - `SOCKSProxyManager`
    - `SOCKSProxyManager.pool_classes_by_scheme`