解決：pipenv shell報錯：AttributeError: 'module' object has no attribute 'run'

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利用pipenv shell切換到虛擬環境時，顯示報錯：AttributeError: ‘module‘ object has no attribute ‘run‘

可以看到是d:\program\python34\lib\site-packages\pipenv\shells.py檔案的第62行報錯了，提示模組沒有run的屬性，於是就跑到該檔案的第62行去看

選中run，CTRL+B發現能看到源碼，源碼如下：

if sys.version_info >= (3, 6):        # Nearly same args as Popen.__init__ except for timeout, input, and check        def run(args: _CMD,                timeout: Optional[float] = ...,                input: Optional[_TXT] = ...,                check: bool = ...,                bufsize: int = ...,                executable: _PATH = ...,                stdin: _FILE = ...,                stdout: _FILE = ...,                stderr: _FILE = ...,                preexec_fn: Callable[[], Any] = ...,                close_fds: bool = ...,                shell: bool = ...,                cwd: Optional[_PATH] = ...,                env: Optional[_ENV] = ...,                universal_newlines: bool = ...,                startupinfo: Any = ...,                creationflags: int = ...,                restore_signals: bool = ...,                start_new_session: bool = ...,                pass_fds: Any = ...,                *,                encoding: Optional[str] = ...,                errors: Optional[str] = ...) -> CompletedProcess: ...    else:        # Nearly same args as Popen.__init__ except for timeout, input, and check        def run(args: _CMD,                timeout: Optional[float] = ...,                input: Optional[_TXT] = ...,                check: bool = ...,                bufsize: int = ...,                executable: _PATH = ...,                stdin: _FILE = ...,                stdout: _FILE = ...,                stderr: _FILE = ...,                preexec_fn: Callable[[], Any] = ...,                close_fds: bool = ...,                shell: bool = ...,                cwd: Optional[_PATH] = ...,                env: Optional[_ENV] = ...,                universal_newlines: bool = ...,                startupinfo: Any = ...,                creationflags: int = ...,                restore_signals: bool = ...,                start_new_session: bool = ...,                pass_fds: Any = ...) -> CompletedProcess: ...

但是請看第一行 if sys.version_info >= (3, 6):  ，我們姑且猜測一下，這個3.6就是python的版本號碼，如果版本大於3.6，就用第一個run函數，否則就用第二個run函數，這兩個函數有什麼不同——第一個run函數多了下面兩行

　　　　　　　　　encoding: Optional[str] = ...,               errors: Optional[str] = ...)

可是，既然版本大於3.6和小於3.6都會調用已存在的run函數，那為什麼會報錯？我們來看一下比較完整的代碼

不知道有沒有留意到當版本大於3.5時，才會去第二個if裡判斷是否大於3.6，而我當前的版本是3.4.4，因此不滿足大於3.5的if判斷，而滿足大於3.3的if判斷，此時下面的方法都是call了(事實上，只要滿足版本<3.5，都應該調用的是call方法)

if sys.version_info >= (3, 5):    class CompletedProcess:        # morally: _CMD        args = ...  # type: Any        returncode = ...  # type: int        # morally: Optional[_TXT]        stdout = ...  # type: Any        stderr = ...  # type: Any        def __init__(self, args: _CMD,                     returncode: int,                     stdout: Optional[_TXT] = ...,                     stderr: Optional[_TXT] = ...) -> None: ...        def check_returncode(self) -> None: ...    if sys.version_info >= (3, 6):        # Nearly same args as Popen.__init__ except for timeout, input, and check        def run(args: _CMD,                timeout: Optional[float] = ...,                input: Optional[_TXT] = ...,                check: bool = ...,                bufsize: int = ...,                executable: _PATH = ...,                stdin: _FILE = ...,                stdout: _FILE = ...,                stderr: _FILE = ...,                preexec_fn: Callable[[], Any] = ...,                close_fds: bool = ...,                shell: bool = ...,                cwd: Optional[_PATH] = ...,                env: Optional[_ENV] = ...,                universal_newlines: bool = ...,                startupinfo: Any = ...,                creationflags: int = ...,                restore_signals: bool = ...,                start_new_session: bool = ...,                pass_fds: Any = ...,                *,                encoding: Optional[str] = ...,                errors: Optional[str] = ...) -> CompletedProcess: ...    else:        # Nearly same args as Popen.__init__ except for timeout, input, and check        def run(args: _CMD,                timeout: Optional[float] = ...,                input: Optional[_TXT] = ...,                check: bool = ...,                bufsize: int = ...,                executable: _PATH = ...,                stdin: _FILE = ...,                stdout: _FILE = ...,                stderr: _FILE = ...,                preexec_fn: Callable[[], Any] = ...,                close_fds: bool = ...,                shell: bool = ...,                cwd: Optional[_PATH] = ...,                env: Optional[_ENV] = ...,                universal_newlines: bool = ...,                startupinfo: Any = ...,                creationflags: int = ...,                restore_signals: bool = ...,                start_new_session: bool = ...,                pass_fds: Any = ...) -> CompletedProcess: ...# Same args as Popen.__init__if sys.version_info >= (3, 3):    # 3.3 added timeout    def call(args: _CMD,             bufsize: int = ...,             executable: _PATH = ...,             stdin: _FILE = ...,             stdout: _FILE = ...,             stderr: _FILE = ...,             preexec_fn: Callable[[], Any] = ...,             close_fds: bool = ...,             shell: bool = ...,             cwd: Optional[_PATH] = ...,             env: Optional[_ENV] = ...,             universal_newlines: bool = ...,             startupinfo: Any = ...,             creationflags: int = ...,             restore_signals: bool = ...,             start_new_session: bool = ...,             pass_fds: Any = ...,             timeout: float = ...) -> int: ...else:    def call(args: _CMD,             bufsize: int = ...,             executable: _PATH = ...,             stdin: _FILE = ...,             stdout: _FILE = ...,             stderr: _FILE = ...,             preexec_fn: Callable[[], Any] = ...,             close_fds: bool = ...,             shell: bool = ...,             cwd: Optional[_PATH] = ...,             env: Optional[_ENV] = ...,             universal_newlines: bool = ...,             startupinfo: Any = ...,             creationflags: int = ...,             restore_signals: bool = ...,             start_new_session: bool = ...,             pass_fds: Any = ...) -> int: ...

瞭解這個，就知道如何解決了，只要修改源碼把run換成call即可(如果要使用3.5及以上的版本，建議把call再換回run)

再次使用pipenv shell，發現可以切換到虛擬環境了

 

 

 

參考文章

https://cuiqingcai.com/5846.html

 

解決：pipenv shell報錯：AttributeError: 'module' object has no attribute 'run'