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                ### 導航 - [索引](../genindex.xhtml "總目錄") - [模塊](../py-modindex.xhtml "Python 模塊索引") | - [下一頁](winsound.xhtml "winsound --- Sound-playing interface for Windows") | - [上一頁](msvcrt.xhtml "msvcrt --- Useful routines from the MS VC++ runtime") | - ![](https://box.kancloud.cn/a721fc7ec672275e257bbbfde49a4d4e_16x16.png) - [Python](https://www.python.org/) ? - zh\_CN 3.7.3 [文檔](../index.xhtml) ? - [Python 標準庫](index.xhtml) ? - [Windows系統相關模塊](windows.xhtml) ? - $('.inline-search').show(0); | # [`winreg`](#module-winreg "winreg: Routines and objects for manipulating the Windows registry. (Windows)") --- Windows 注冊表訪問 - - - - - - 這些函數將 Windows 注冊表 API 暴露給 Python。為了確保即便程序員忽略了顯式關閉句柄,該句柄依然能夠正確關閉,它使用了一個 [handle 對象](#handle-object) 而不是整數來作為注冊表句柄。 在 3.3 版更改: 該模塊中的幾個函數被用于引發 [`WindowsError`](exceptions.xhtml#WindowsError "WindowsError"),該異常現在是 [`OSError`](exceptions.xhtml#OSError "OSError") 的別名。 ## 函數 該模塊提供了下列函數: `winreg.``CloseKey`(*hkey*)關閉之前打開的注冊表鍵。參數 *hkey* 指之前打開的鍵。 注解 如果沒有使用該方法關閉 *hkey* (或者通過 [`hkey.Close()`](#winreg.PyHKEY.Close "winreg.PyHKEY.Close")),在對象 *hkey* 被 Python 銷毀時會將其關閉。 `winreg.``ConnectRegistry`(*computer\_name*, *key*)建立到另一臺計算上上的預定義注冊表句柄的連接,并返回一個 [handle 對象](#handle-object). *computer\_name* 是遠程計算機的名稱,以 `r"\\computername"` 的形式。如果是 `None` ,將會使用本地計算機。 *key* 是所連接到的預定義句柄。 返回值是所開打鍵的句柄。如果函數失敗,則引發一個 [`OSError`](exceptions.xhtml#OSError "OSError") 異常。 在 3.3 版更改: 參考 [上文](#exception-changed)。 `winreg.``CreateKey`(*key*, *sub\_key*)創建或打開特定的鍵,返回一個 [handle 對象](#handle-object)。 *key* 為某個已經打開的鍵,或者預定義的 [HKEY\_\* 常量](#hkey-constants) 之一。 *sub\_key* 是用于命名該方法所打開或創建的鍵的字符串。 如果 *key* 是預定義鍵之一,*sub\_key* 可能會是 `None`。該情況下,返回的句柄就是傳入函數的句柄。 如果鍵已經存在,則該函數打開已經存在的該鍵。 返回值是所開打鍵的句柄。如果函數失敗,則引發一個 [`OSError`](exceptions.xhtml#OSError "OSError") 異常。 在 3.3 版更改: 參考 [上文](#exception-changed)。 `winreg.``CreateKeyEx`(*key*, *sub\_key*, *reserved=0*, *access=KEY\_WRITE*)創建或打開特定的鍵,返回一個 [handle 對象](#handle-object)。 *key* 為某個已經打開的鍵,或者預定義的 [HKEY\_\* 常量](#hkey-constants) 之一。 *sub\_key* 是用于命名該方法所打開或創建的鍵的字符串。 *reserved* 是一個保留的證書,必須是零。默認值為零。 *access* 為一個整數,用于給鍵的預期安全訪問指定訪問掩碼。默認值為 [`KEY_WRITE`](#winreg.KEY_WRITE "winreg.KEY_WRITE")。 參閱 [Access Rights](#access-rights) 了解其它允許值。 如果 *key* 是預定義鍵之一,*sub\_key* 可能會是 `None`。該情況下,返回的句柄就是傳入函數的句柄。 如果鍵已經存在,則該函數打開已經存在的該鍵。 返回值是所開打鍵的句柄。如果函數失敗,則引發一個 [`OSError`](exceptions.xhtml#OSError "OSError") 異常。 3\.2 新版功能. 在 3.3 版更改: 參考 [上文](#exception-changed)。 `winreg.``DeleteKey`(*key*, *sub\_key*)刪除指定的鍵。 *key* 為某個已經打開的鍵,或者預定義的 [HKEY\_\* 常量](#hkey-constants) 之一。 *sub\_key* 這個字符串必須是由 *key* 參數所指定鍵的一個子項。該值項不可以是 `None`,同時鍵也不可以有子項。 *該方法不能刪除帶有子項的鍵。* 如果方法成功,則整個鍵,包括其所有值項都會被移除。如果方法失敗,則引發一個 [`OSError`](exceptions.xhtml#OSError "OSError") 異常。 在 3.3 版更改: 參考 [上文](#exception-changed)。 `winreg.``DeleteKeyEx`(*key*, *sub\_key*, *access=KEY\_WOW64\_64KEY*, *reserved=0*)刪除指定的鍵。 注解 函數 [`DeleteKeyEx()`](#winreg.DeleteKeyEx "winreg.DeleteKeyEx") 通過 RegDeleteKeyEx 這個 Windows API 函數實現,該函數為 Windows 的64位版本專屬。 參閱 [RegDeleteKeyEx 文檔](https://msdn.microsoft.com/en-us/library/ms724847%28VS.85%29.aspx) \[https://msdn.microsoft.com/en-us/library/ms724847%28VS.85%29.aspx\]。 *key* 為某個已經打開的鍵,或者預定義的 [HKEY\_\* 常量](#hkey-constants) 之一。 *sub\_key* 這個字符串必須是由 *key* 參數所指定鍵的一個子項。該值項不可以是 `None`,同時鍵也不可以有子項。 *reserved* 是一個保留的證書,必須是零。默認值為零。 *access* 為一個整數,用于給鍵的預期安全訪問指定訪問掩碼。默認值為常量 `_WOW64_64KEY` 。參閱 [Access Rights](#access-rights) 了解其它允許值。 *該方法不能刪除帶有子項的鍵。* 如果方法成功,則整個鍵,包括其所有值項都會被移除。如果方法失敗,則引發一個 [`OSError`](exceptions.xhtml#OSError "OSError") 異常。 在不支持的 Windows 版本之上,將會引發 [`NotImplementedError`](exceptions.xhtml#NotImplementedError "NotImplementedError") 異常。 3\.2 新版功能. 在 3.3 版更改: 參考 [上文](#exception-changed)。 `winreg.``DeleteValue`(*key*, *value*)從某個注冊鍵中刪除一個命名值項。 *key* 為某個已經打開的鍵,或者預定義的 [HKEY\_\* 常量](#hkey-constants) 之一。 *value* 為標識所要刪除值項的字符串。 `winreg.``EnumKey`(*key*, *index*)列舉某個已經打開注冊表鍵的子項,并返回一個字符串。 *key* 為某個已經打開的鍵,或者預定義的 [HKEY\_\* 常量](#hkey-constants) 之一。 *index* 為一個整數,用于標識所獲取鍵的索引。 每次調用該函數都會獲取一個子項的名字。通常它會被反復調用,直到引發 [`OSError`](exceptions.xhtml#OSError "OSError") 異常,這說明已經沒有更多的可用值了。 在 3.3 版更改: 參考 [上文](#exception-changed)。 `winreg.``EnumValue`(*key*, *index*)列舉某個已經打開注冊表鍵的值項,并返回一個元組。 *key* 為某個已經打開的鍵,或者預定義的 [HKEY\_\* 常量](#hkey-constants) 之一。 *index* 為一個整數,用于標識要獲取值項的索引。 每次調用該函數都會獲取一個子項的名字。通常它會被反復調用,直到引發 [`OSError`](exceptions.xhtml#OSError "OSError") 異常,這說明已經沒有更多的可用值了。 結果為3元素的元組。 索引 意義 `0` 用于標識值項名稱的字符串。 `1` 保存值項數據的對象,其類型取決于背后的注冊表類型。 `2` 標識值項數據類型的整數。(請查閱 [`SetValueEx()`](#winreg.SetValueEx "winreg.SetValueEx") 文檔中的表格) 在 3.3 版更改: 參考 [上文](#exception-changed)。 `winreg.``ExpandEnvironmentStrings`(*str*)Expands environment variable placeholders `%NAME%` in strings like [`REG_EXPAND_SZ`](#winreg.REG_EXPAND_SZ "winreg.REG_EXPAND_SZ"): ``` >>> ExpandEnvironmentStrings('%windir%') 'C:\\Windows' ``` `winreg.``FlushKey`(*key*)將某個鍵的所有屬性寫入注冊表。 *key* 為某個已經打開的鍵,或者預定義的 [HKEY\_\* 常量](#hkey-constants) 之一。 It is not necessary to call [`FlushKey()`](#winreg.FlushKey "winreg.FlushKey") to change a key. Registry changes are flushed to disk by the registry using its lazy flusher. Registry changes are also flushed to disk at system shutdown. Unlike [`CloseKey()`](#winreg.CloseKey "winreg.CloseKey"), the [`FlushKey()`](#winreg.FlushKey "winreg.FlushKey") method returns only when all the data has been written to the registry. An application should only call [`FlushKey()`](#winreg.FlushKey "winreg.FlushKey") if it requires absolute certainty that registry changes are on disk. 注解 If you don't know whether a [`FlushKey()`](#winreg.FlushKey "winreg.FlushKey") call is required, it probably isn't. `winreg.``LoadKey`(*key*, *sub\_key*, *file\_name*)Creates a subkey under the specified key and stores registration information from a specified file into that subkey. *key* is a handle returned by [`ConnectRegistry()`](#winreg.ConnectRegistry "winreg.ConnectRegistry") or one of the constants [`HKEY_USERS`](#winreg.HKEY_USERS "winreg.HKEY_USERS") or [`HKEY_LOCAL_MACHINE`](#winreg.HKEY_LOCAL_MACHINE "winreg.HKEY_LOCAL_MACHINE"). *sub\_key* is a string that identifies the subkey to load. *file\_name* is the name of the file to load registry data from. This file must have been created with the [`SaveKey()`](#winreg.SaveKey "winreg.SaveKey") function. Under the file allocation table (FAT) file system, the filename may not have an extension. A call to [`LoadKey()`](#winreg.LoadKey "winreg.LoadKey") fails if the calling process does not have the `SE_RESTORE_PRIVILEGE` privilege. Note that privileges are different from permissions -- see the [RegLoadKey documentation](https://msdn.microsoft.com/en-us/library/ms724889%28v=VS.85%29.aspx) \[https://msdn.microsoft.com/en-us/library/ms724889%28v=VS.85%29.aspx\] for more details. If *key* is a handle returned by [`ConnectRegistry()`](#winreg.ConnectRegistry "winreg.ConnectRegistry"), then the path specified in *file\_name* is relative to the remote computer. `winreg.``OpenKey`(*key*, *sub\_key*, *reserved=0*, *access=KEY\_READ*)`winreg.``OpenKeyEx`(*key*, *sub\_key*, *reserved=0*, *access=KEY\_READ*)Opens the specified key, returning a [handle object](#handle-object). *key* 為某個已經打開的鍵,或者預定義的 [HKEY\_\* 常量](#hkey-constants) 之一。 *sub\_key* is a string that identifies the sub\_key to open. *reserved* is a reserved integer, and must be zero. The default is zero. *access* is an integer that specifies an access mask that describes the desired security access for the key. Default is [`KEY_READ`](#winreg.KEY_READ "winreg.KEY_READ"). See [Access Rights](#access-rights) for other allowed values. The result is a new handle to the specified key. If the function fails, [`OSError`](exceptions.xhtml#OSError "OSError") is raised. 在 3.2 版更改: Allow the use of named arguments. 在 3.3 版更改: 參考 [上文](#exception-changed)。 `winreg.``QueryInfoKey`(*key*)Returns information about a key, as a tuple. *key* 為某個已經打開的鍵,或者預定義的 [HKEY\_\* 常量](#hkey-constants) 之一。 結果為3元素的元組。 索引 意義 `0` An integer giving the number of sub keys this key has. `1` An integer giving the number of values this key has. `2` An integer giving when the key was last modified (if available) as 100's of nanoseconds since Jan 1, 1601. `winreg.``QueryValue`(*key*, *sub\_key*)Retrieves the unnamed value for a key, as a string. *key* 為某個已經打開的鍵,或者預定義的 [HKEY\_\* 常量](#hkey-constants) 之一。 *sub\_key* is a string that holds the name of the subkey with which the value is associated. If this parameter is `None` or empty, the function retrieves the value set by the [`SetValue()`](#winreg.SetValue "winreg.SetValue") method for the key identified by *key*. Values in the registry have name, type, and data components. This method retrieves the data for a key's first value that has a NULL name. But the underlying API call doesn't return the type, so always use [`QueryValueEx()`](#winreg.QueryValueEx "winreg.QueryValueEx") if possible. `winreg.``QueryValueEx`(*key*, *value\_name*)Retrieves the type and data for a specified value name associated with an open registry key. *key* 為某個已經打開的鍵,或者預定義的 [HKEY\_\* 常量](#hkey-constants) 之一。 *value\_name* is a string indicating the value to query. The result is a tuple of 2 items: 索引 意義 `0` The value of the registry item. `1` An integer giving the registry type for this value (see table in docs for [`SetValueEx()`](#winreg.SetValueEx "winreg.SetValueEx")) `winreg.``SaveKey`(*key*, *file\_name*)Saves the specified key, and all its subkeys to the specified file. *key* 為某個已經打開的鍵,或者預定義的 [HKEY\_\* 常量](#hkey-constants) 之一。 *file\_name* is the name of the file to save registry data to. This file cannot already exist. If this filename includes an extension, it cannot be used on file allocation table (FAT) file systems by the [`LoadKey()`](#winreg.LoadKey "winreg.LoadKey")method. If *key* represents a key on a remote computer, the path described by *file\_name* is relative to the remote computer. The caller of this method must possess the `SeBackupPrivilege` security privilege. Note that privileges are different than permissions -- see the [Conflicts Between User Rights and Permissions documentation](https://msdn.microsoft.com/en-us/library/ms724878%28v=VS.85%29.aspx) \[https://msdn.microsoft.com/en-us/library/ms724878%28v=VS.85%29.aspx\]for more details. This function passes NULL for *security\_attributes* to the API. `winreg.``SetValue`(*key*, *sub\_key*, *type*, *value*)Associates a value with a specified key. *key* 為某個已經打開的鍵,或者預定義的 [HKEY\_\* 常量](#hkey-constants) 之一。 *sub\_key* is a string that names the subkey with which the value is associated. *type* is an integer that specifies the type of the data. Currently this must be [`REG_SZ`](#winreg.REG_SZ "winreg.REG_SZ"), meaning only strings are supported. Use the [`SetValueEx()`](#winreg.SetValueEx "winreg.SetValueEx")function for support for other data types. *value* is a string that specifies the new value. If the key specified by the *sub\_key* parameter does not exist, the SetValue function creates it. Value lengths are limited by available memory. Long values (more than 2048 bytes) should be stored as files with the filenames stored in the configuration registry. This helps the registry perform efficiently. The key identified by the *key* parameter must have been opened with [`KEY_SET_VALUE`](#winreg.KEY_SET_VALUE "winreg.KEY_SET_VALUE") access. `winreg.``SetValueEx`(*key*, *value\_name*, *reserved*, *type*, *value*)Stores data in the value field of an open registry key. *key* 為某個已經打開的鍵,或者預定義的 [HKEY\_\* 常量](#hkey-constants) 之一。 *value\_name* is a string that names the subkey with which the value is associated. *reserved* can be anything -- zero is always passed to the API. *type* is an integer that specifies the type of the data. See [Value Types](#value-types) for the available types. *value* is a string that specifies the new value. This method can also set additional value and type information for the specified key. The key identified by the key parameter must have been opened with [`KEY_SET_VALUE`](#winreg.KEY_SET_VALUE "winreg.KEY_SET_VALUE") access. To open the key, use the [`CreateKey()`](#winreg.CreateKey "winreg.CreateKey") or [`OpenKey()`](#winreg.OpenKey "winreg.OpenKey") methods. Value lengths are limited by available memory. Long values (more than 2048 bytes) should be stored as files with the filenames stored in the configuration registry. This helps the registry perform efficiently. `winreg.``DisableReflectionKey`(*key*)Disables registry reflection for 32-bit processes running on a 64-bit operating system. *key* 為某個已經打開的鍵,或者預定義的 [HKEY\_\* 常量](#hkey-constants) 之一。 Will generally raise [`NotImplemented`](constants.xhtml#NotImplemented "NotImplemented") if executed on a 32-bit operating system. If the key is not on the reflection list, the function succeeds but has no effect. Disabling reflection for a key does not affect reflection of any subkeys. `winreg.``EnableReflectionKey`(*key*)Restores registry reflection for the specified disabled key. *key* 為某個已經打開的鍵,或者預定義的 [HKEY\_\* 常量](#hkey-constants) 之一。 Will generally raise [`NotImplemented`](constants.xhtml#NotImplemented "NotImplemented") if executed on a 32-bit operating system. Restoring reflection for a key does not affect reflection of any subkeys. `winreg.``QueryReflectionKey`(*key*)Determines the reflection state for the specified key. *key* 為某個已經打開的鍵,或者預定義的 [HKEY\_\* 常量](#hkey-constants) 之一。 Returns `True` if reflection is disabled. Will generally raise [`NotImplemented`](constants.xhtml#NotImplemented "NotImplemented") if executed on a 32-bit operating system. ## 常數 The following constants are defined for use in many `_winreg` functions. ### HKEY\_\* Constants `winreg.``HKEY_CLASSES_ROOT`Registry entries subordinate to this key define types (or classes) of documents and the properties associated with those types. Shell and COM applications use the information stored under this key. `winreg.``HKEY_CURRENT_USER`Registry entries subordinate to this key define the preferences of the current user. These preferences include the settings of environment variables, data about program groups, colors, printers, network connections, and application preferences. `winreg.``HKEY_LOCAL_MACHINE`Registry entries subordinate to this key define the physical state of the computer, including data about the bus type, system memory, and installed hardware and software. `winreg.``HKEY_USERS`Registry entries subordinate to this key define the default user configuration for new users on the local computer and the user configuration for the current user. `winreg.``HKEY_PERFORMANCE_DATA`Registry entries subordinate to this key allow you to access performance data. The data is not actually stored in the registry; the registry functions cause the system to collect the data from its source. `winreg.``HKEY_CURRENT_CONFIG`Contains information about the current hardware profile of the local computer system. `winreg.``HKEY_DYN_DATA`This key is not used in versions of Windows after 98. ### Access Rights For more information, see [Registry Key Security and Access](https://msdn.microsoft.com/en-us/library/ms724878%28v=VS.85%29.aspx) \[https://msdn.microsoft.com/en-us/library/ms724878%28v=VS.85%29.aspx\]. `winreg.``KEY_ALL_ACCESS`Combines the STANDARD\_RIGHTS\_REQUIRED, [`KEY_QUERY_VALUE`](#winreg.KEY_QUERY_VALUE "winreg.KEY_QUERY_VALUE"), [`KEY_SET_VALUE`](#winreg.KEY_SET_VALUE "winreg.KEY_SET_VALUE"), [`KEY_CREATE_SUB_KEY`](#winreg.KEY_CREATE_SUB_KEY "winreg.KEY_CREATE_SUB_KEY"), [`KEY_ENUMERATE_SUB_KEYS`](#winreg.KEY_ENUMERATE_SUB_KEYS "winreg.KEY_ENUMERATE_SUB_KEYS"), [`KEY_NOTIFY`](#winreg.KEY_NOTIFY "winreg.KEY_NOTIFY"), and [`KEY_CREATE_LINK`](#winreg.KEY_CREATE_LINK "winreg.KEY_CREATE_LINK") access rights. `winreg.``KEY_WRITE`Combines the STANDARD\_RIGHTS\_WRITE, [`KEY_SET_VALUE`](#winreg.KEY_SET_VALUE "winreg.KEY_SET_VALUE"), and [`KEY_CREATE_SUB_KEY`](#winreg.KEY_CREATE_SUB_KEY "winreg.KEY_CREATE_SUB_KEY") access rights. `winreg.``KEY_READ`Combines the STANDARD\_RIGHTS\_READ, [`KEY_QUERY_VALUE`](#winreg.KEY_QUERY_VALUE "winreg.KEY_QUERY_VALUE"), [`KEY_ENUMERATE_SUB_KEYS`](#winreg.KEY_ENUMERATE_SUB_KEYS "winreg.KEY_ENUMERATE_SUB_KEYS"), and [`KEY_NOTIFY`](#winreg.KEY_NOTIFY "winreg.KEY_NOTIFY") values. `winreg.``KEY_EXECUTE`Equivalent to [`KEY_READ`](#winreg.KEY_READ "winreg.KEY_READ"). `winreg.``KEY_QUERY_VALUE`Required to query the values of a registry key. `winreg.``KEY_SET_VALUE`Required to create, delete, or set a registry value. `winreg.``KEY_CREATE_SUB_KEY`Required to create a subkey of a registry key. `winreg.``KEY_ENUMERATE_SUB_KEYS`Required to enumerate the subkeys of a registry key. `winreg.``KEY_NOTIFY`Required to request change notifications for a registry key or for subkeys of a registry key. `winreg.``KEY_CREATE_LINK`Reserved for system use. #### 64-bit Specific For more information, see [Accessing an Alternate Registry View](https://msdn.microsoft.com/en-us/library/aa384129(v=VS.85).aspx) \[https://msdn.microsoft.com/en-us/library/aa384129(v=VS.85).aspx\]. `winreg.``KEY_WOW64_64KEY`Indicates that an application on 64-bit Windows should operate on the 64-bit registry view. `winreg.``KEY_WOW64_32KEY`Indicates that an application on 64-bit Windows should operate on the 32-bit registry view. ### Value Types For more information, see [Registry Value Types](https://msdn.microsoft.com/en-us/library/ms724884%28v=VS.85%29.aspx) \[https://msdn.microsoft.com/en-us/library/ms724884%28v=VS.85%29.aspx\]. `winreg.``REG_BINARY`Binary data in any form. `winreg.``REG_DWORD`32-bit number. `winreg.``REG_DWORD_LITTLE_ENDIAN`A 32-bit number in little-endian format. Equivalent to [`REG_DWORD`](#winreg.REG_DWORD "winreg.REG_DWORD"). `winreg.``REG_DWORD_BIG_ENDIAN`A 32-bit number in big-endian format. `winreg.``REG_EXPAND_SZ`Null-terminated string containing references to environment variables (`%PATH%`). `winreg.``REG_LINK`A Unicode symbolic link. `winreg.``REG_MULTI_SZ`A sequence of null-terminated strings, terminated by two null characters. (Python handles this termination automatically.) `winreg.``REG_NONE`No defined value type. `winreg.``REG_QWORD`A 64-bit number. 3\.6 新版功能. `winreg.``REG_QWORD_LITTLE_ENDIAN`A 64-bit number in little-endian format. Equivalent to [`REG_QWORD`](#winreg.REG_QWORD "winreg.REG_QWORD"). 3\.6 新版功能. `winreg.``REG_RESOURCE_LIST`A device-driver resource list. `winreg.``REG_FULL_RESOURCE_DESCRIPTOR`A hardware setting. `winreg.``REG_RESOURCE_REQUIREMENTS_LIST`A hardware resource list. `winreg.``REG_SZ`A null-terminated string. ## Registry Handle Objects This object wraps a Windows HKEY object, automatically closing it when the object is destroyed. To guarantee cleanup, you can call either the [`Close()`](#winreg.PyHKEY.Close "winreg.PyHKEY.Close") method on the object, or the [`CloseKey()`](#winreg.CloseKey "winreg.CloseKey") function. All registry functions in this module return one of these objects. All registry functions in this module which accept a handle object also accept an integer, however, use of the handle object is encouraged. Handle objects provide semantics for [`__bool__()`](../reference/datamodel.xhtml#object.__bool__ "object.__bool__") -- thus ``` if handle: print("Yes") ``` will print `Yes` if the handle is currently valid (has not been closed or detached). The object also support comparison semantics, so handle objects will compare true if they both reference the same underlying Windows handle value. Handle objects can be converted to an integer (e.g., using the built-in [`int()`](functions.xhtml#int "int") function), in which case the underlying Windows handle value is returned. You can also use the [`Detach()`](#winreg.PyHKEY.Detach "winreg.PyHKEY.Detach") method to return the integer handle, and also disconnect the Windows handle from the handle object. `PyHKEY.``Close`()Closes the underlying Windows handle. If the handle is already closed, no error is raised. `PyHKEY.``Detach`()Detaches the Windows handle from the handle object. The result is an integer that holds the value of the handle before it is detached. If the handle is already detached or closed, this will return zero. After calling this function, the handle is effectively invalidated, but the handle is not closed. You would call this function when you need the underlying Win32 handle to exist beyond the lifetime of the handle object. `PyHKEY.``__enter__`()`PyHKEY.``__exit__`(*\*exc\_info*)The HKEY object implements [`__enter__()`](../reference/datamodel.xhtml#object.__enter__ "object.__enter__") and [`__exit__()`](../reference/datamodel.xhtml#object.__exit__ "object.__exit__") and thus supports the context protocol for the [`with`](../reference/compound_stmts.xhtml#with) statement: ``` with OpenKey(HKEY_LOCAL_MACHINE, "foo") as key: ... # work with key ``` will automatically close *key* when control leaves the [`with`](../reference/compound_stmts.xhtml#with) block. ### 導航 - [索引](../genindex.xhtml "總目錄") - [模塊](../py-modindex.xhtml "Python 模塊索引") | - [下一頁](winsound.xhtml "winsound --- Sound-playing interface for Windows") | - [上一頁](msvcrt.xhtml "msvcrt --- Useful routines from the MS VC++ runtime") | - ![](https://box.kancloud.cn/a721fc7ec672275e257bbbfde49a4d4e_16x16.png) - [Python](https://www.python.org/) ? - zh\_CN 3.7.3 [文檔](../index.xhtml) ? - [Python 標準庫](index.xhtml) ? - [Windows系統相關模塊](windows.xhtml) ? - $('.inline-search').show(0); | ? [版權所有](../copyright.xhtml) 2001-2019, Python Software Foundation. Python 軟件基金會是一個非盈利組織。 [請捐助。](https://www.python.org/psf/donations/) 最后更新于 5月 21, 2019. [發現了問題](../bugs.xhtml)? 使用[Sphinx](http://sphinx.pocoo.org/)1.8.4 創建。
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