python - 未绑定(bind)本地错误 : local variable 'fullfilename' referenced before assignment

Question

我正面临一个错误:

UnboundLocalError: local variable 'fullfilename' referenced before assignment

代码块:

caminho_path = self.tempDir
arquivos = os.listdir(self.tempDir)

for arquivo in arquivos:
    if arquivo.endswith(".zip"):
        fullfilename = os.path.join(caminho_path, arquivo)

self.driver.implicitly_wait(5)

sleep(10)

with ZipFile(fullfilename, 'r') as zipObj:
    listOfFileNames = zipObj.namelist()
    for fileName in listOfFileNames:
        if fileName.endswith('.csv'):
            zipObj.extract(fileName, self.tempDir)
            print('unzip' + str(fileName))

错误:

File "path...", line 166, in ...

    with ZipFile(fullfilename, 'r') as zipObj:
UnboundLocalError: local variable 'fullfilename' referenced before assignment

Answer 1

这个错误信息...

UnboundLocalError: local variable 'fullfilename' referenced before assignment

...意味着您在变量 fullfilename 被赋值之前就已经引用了它。

---

在您的代码块中:

for arquivo in arquivos:
    if arquivo.endswith(".zip"):
        fullfilename = os.path.join(caminho_path, arquivo)

仅当条件 arquivo.endswith(".zip") 为 true 时，变量 fullfilename 才会被赋值/强>。否则变量 fullfilename 保持未分配。

在其中一个变量未分配的情况下，您尝试在代码的后面部分引用它:

with ZipFile(fullfilename, 'r') as zipObj:

即使变量 fullfilename 仍然未分配。因此您会看到错误。