python 连接SAP 代码

def Main():
    sap_app = r"C:\Program Files (x86)\SAP\FrontEnd\SAPgui\saplogon.exe"
    subprocess.Popen(sap_app)
    time.sleep(1)
    flt = 0
    while flt == 0:
        try:
            hwnd = win32gui.FindWindow(None, "SAP Logon 750")
            flt = win32gui.FindWindowEx(hwnd, None, "Edit", None)
        except Exception as e:
            time.sleep(0.5)

    win32gui.SendMessage(flt, win32con.WM_SETTEXT, None, "IR2-ERP Integration UAT")
    win32gui.SendMessage(flt, win32con.WM_KEYDOWN, win32con.VK_RIGHT, 0)
    win32gui.SendMessage(flt, win32con.WM_KEYUP, win32con.VK_RIGHT, 0)
    time.sleep(0.1)

    dlg = win32gui.FindWindowEx(hwnd, None, "Button", None)  # 登陆（0）
    win32gui.SendMessage(dlg, win32con.WM_LBUTTONDOWN, 0)
    win32gui.SendMessage(dlg, win32con.WM_LBUTTONUP, 0)

    SapGuiAuto = win32com.client.GetObject("SAPGUI")

    if not type(SapGuiAuto) == win32com.client.CDispatch:
        return

    application = SapGuiAuto.GetScriptingEngine
    if not type(application) == win32com.client.CDispatch:
        SapGuiAuto = None
        return

    connection = application.Children(0)
    if not type(connection) == win32com.client.CDispatch:
        application = None
        SapGuiAuto = None
        return
    time.sleep(2)

    flag = 0
    while flag == 0:
        try:
            session = connection.Children(0)
            flag = 1
        except:
            time.sleep(0.5)

    if not type(session) == win32com.client.CDispatch:
        connection = None
        application = None
        SapGuiAuto = None
        return
    session.findById("wnd[0]/usr/txtRSYST-BNAME").text = "WANG"  # 此次放入您的SAP登陆用户名
    session.findById("wnd[0]/usr/pwdRSYST-BCODE").text = "Wxz"  # 此次放入您的SAP登陆密码
    session.findById("wnd[0]").sendVKey(0)


if __name__ == "__main__":
    Main()