Python os.rename（src，dir）找不到指定的文件？

我正在用python为一个童子军小屋编写一个程序，用来存储童子军的信息并能够添加/删除童子军。该规范说，它必须使用文件处理来存储侦察兵

在编写remove scouts部分的代码时，我遇到了os.rename（）命令的问题。我真的不明白为什么。sed目录实际上并不存在，这是我的问题吗？src dir没有，我想将其重命名为其他名称。例如，我想将“IDTemp.txt”重命名为“IDs.txt”，而不将“IDs.txt”实际作为文件存在。这可能吗？ 代码如下：

elif self._name == "rem":
            remID = str(scoutID.get())
            if remID != "":
                #store all the lines that are in the file in a temp file
                with open(fileName,"r") as f:
                    lines = f.readlines()
                    with open(tempFileName,"a") as ft:
                        for line in lines:
                            #splits the line by ',', then takes the last part. It then trims this to remove the '/n' prefix
                            sctID = str(line.split(",")[3])[:-1]
                            if sctID != remID: #if the ID we are looking to remove isn't
                                #the ID of the scout we are currently looking at, move it to the temp file
                                ft.write(line)
                            else:
                                #Remove the scout ID of the scout that is being removed from the ID file
                                with open(IDFileName,"r+") as fi:
                                    lines = fi.readlines()
                                    with open(IDTemp,"a") as ft:
                                        for line in lines:
                                            if line[:-1] != sctID:
                                                ft.write(line)
                        os.rename(IDTemp,IDFileName)

                #remove the main file, then rectrate a new one
                os.remove(fileName)
                file = open(fileName,"a")
                file.close()

                #copy all the lines back to the main file
                with open(tempFileName,"r") as tf:
                    lines = tf.readlines()
                    with open(fileName,"a") as f:
                        for line in lines:
                            f.write(line)
                #finally, delete and recreate the temp file
                os.remove(tempFileName)
                file = open(tempFileName,"a")
                file.close()
            #remove the window    
            master.destroy()

输出：

Exception in Tkinter callback
Traceback (most recent call last):
  File "C:\Python34\lib\tkinter\__init__.py", line 1533, in __call__
    return self.func(*args)
  File "C:\Users\KRIS\Documents\Python Projects\Scouts\popupWindow.py", line     88, in _callback
    os.rename(IDTemp,IDFileName)
FileNotFoundError: [WinError 2] The system cannot find the file specified:     'C:\\Users\\KRIS\\Scouts\\Temp\\IDTemp.txt' ->     'C:\\Users\\KRIS\\Scouts\\Temp\\IDs.txt'

---

通过重写代码部分修复了此问题，并将ID从temp复制到主ID文件的新副本，留下ID以删除

remID

。然后我删除了临时文件。

在哪里创建了

IDTemp

？如果

sctID！=remID

？@cdarke代码得到了很好的注释。如上所述，如果ID不是我们要删除的ID，则该行将写入临时文件。IDTemp是在我的主类中创建的，当程序运行时，您需要源文件存在，而它不。。。如果您有疑问，请使用os.path.exists并打印（或raise…）。@Ericleveil源文件确实存在于该点，因为它是在使用open（IDTemp，“a”）调用ft时创建的。使用实际的tempfile将是一个更好的实现，您也不必总是调用readlines，只需在file对象上迭代即可