os.path.exit

`os.path` 模块是 Python 内置模块之一，提供了许多操作文件路径的函数。其中，`os.path.exists()` 函数用于判断指定路径的文件或目录是否存在。

具体而言，`os.path.exists(path)` 函数接受一个字符串参数 `path`，表示要判断的文件或目录路径。如果该路径存在，则返回 `True`，否则返回 `False`。

示例代码如下：

import os.path

path = '/home/user/file.txt'
if os.path.exists(path):
    print('File exists!')
else:
    print('File does not exist!')

相关问题

import os import win32com.client path = r'C:\Users\Administrator\Desktop\pr\2\5E2206172401600B' if not os.path.exists(path): print('路径不存在！') else: for root, dirs, files in os.walk(path): for file in files: if file.endswith('.xlsx') or file.endswith('.xls'): try: excel = win32com.client.Dispatch('Excel.Application') workbook = excel.Workbooks.Open(os.path.join(root, file)) workbook.ExportAsFixedFormat(0, os.path.join(root, os.path.splitext(file)[0] + '.pdf')) workbook.Close() excel.Quit() del excel # 删除该对象，释放内存 except Exception as e: print('转换文件 %s 出错：%s' % (file, e)) print('执行结束！')

以下是类似功能的VBA代码，可以将一个文件夹下的Excel文件转换为PDF格式：

Sub ConvertExcelToPDF()
    Dim fs As Object
    Set fs = CreateObject("Scripting.FileSystemObject")
    Dim folder_path As String
    folder_path = "C:\Users\Administrator\Desktop\pr\2\5E2206172401600B"
    If Not fs.FolderExists(folder_path) Then
        MsgBox "路径不存在！"
        Exit Sub
    End If
    Dim fso As Object
    Set fso = CreateObject("Scripting.FileSystemObject")
    Dim excel_app As Object
    Dim workbook As Object
    Dim file As Object
    For Each file In fso.GetFolder(folder_path).Files
        If LCase(Right(file.Name, 4)) = "xlsx" Or LCase(Right(file.Name, 3)) = "xls" Then
            On Error Resume Next
            Set excel_app = CreateObject("Excel.Application")
            Set workbook = excel_app.Workbooks.Open(file.Path)
            workbook.ExportAsFixedFormat 0, Replace(file.Path, ".xlsx", ".pdf")
            workbook.Close False
            excel_app.Quit
            Set excel_app = Nothing
            Set workbook = Nothing
            On Error GoTo 0
        End If
    Next file
    MsgBox "执行结束！"
End Sub

请注意，VBA代码中使用的对象与方法与Python代码中略有不同。如果您需要更多帮助，请告诉我。

解释一下“def main(): newBricks = packageVersionsFromConfig() newDict = getDependencies(newBricks, "davinci") sipver = newDict.get(SIP_PACKAGE_NAME) sipver =sipver['release'] logging.info("BRICKS SIP package version is %s", sipver) handleRepo(SIP_PACKAGE_NAME, False) logging.info("Cloning SIP repo, hold your horses, this could take a while (1.8G)") repo = git.Repo(os.path.join(GIT_WORKING_DIR, SIP_PACKAGE_NAME)) repo.git.checkout(sipver) logging.info ("Git status of repo %s is %s ", SIP_PACKAGE_NAME, repo.git.status()) #copying files to SIP folder sipVersion = [] reg_compile = re.compile("SIP_*") for dirpath, dirnames, filenames in os.walk(os.path.join(GIT_WORKING_DIR, SIP_PACKAGE_NAME, "src")): sipVersion = sipVersion + [dirname for dirname in dirnames if reg_compile.match(dirname)] logging.info("Vector SIP version is %s", sipVersion) if input("WARNING !!!! You're about to overwrite your local SIP folder. Are you sure you want to continue ? (y/n)") != "y": exit("I wish you good fortune") for dirpath, dirnames, filenames in os.walk(os.path.join("src","SIP")): for filename in filenames: if filename == "CMakeLists.txt": continue absfile = os.path.join(dirpath, filename) #logging.info(absfile) os.remove(absfile) for dirname in dirnames: if dirname == "Components": continue absdir = os.path.join(dirpath, dirname) #logging.info(absfile) shutil.rmtree(absdir) logging.info("Copying source files from Vector SIP cloned repo to the SIP folder") distutils.dir_util.copy_tree(os.path.join(GIT_WORKING_DIR, SIP_PACKAGE_NAME, "src", sipVersion[0]), os.path.join("src","SIP")) ”

这段代码是一个Python程序的主函数（`main()`），它执行了一系列操作来处理一个名为"SIP"的软件包。下面是代码的解释：

1. `newBricks = packageVersionsFromConfig()`：通过调用`packageVersionsFromConfig()`函数，从配置中获取软件包的版本信息，将其存储在`newBricks`变量中。

2. `newDict = getDependencies(newBricks, "davinci")`：通过调用`getDependencies()`函数，获取"SIP"软件包在"davinci"环境下的依赖项，并将其存储在`newDict`变量中。

3. `sipver = newDict.get(SIP_PACKAGE_NAME)`：从`newDict`字典中获取"SIP"软件包的版本信息，并将其存储在`sipver`变量中。

4. `代码从解释器到内存再到 CPU 再返回的过程