python3中的遞歸文件搜索問題

Question

我正在製作一個遞歸搜索具有特定後綴的文件目錄的函數。

TypeError: slice indices must be integers or None or have an index method

指着這一行：

if path.endswith('.',sf)==True: l.append(path)

.endswith（）返回一個布爾值，用來測試串，憑啥是它給了我關於非整數的問題？

此外，我決定只打印所有內容，如果文件不是目錄或文件（導致第一次運行很快發生），則只需輸出try/except語句。它跑罰款一兩分鐘，然後開始吐出except子句

something went wrong with /sys/bus/cpu/devices/cpu0/node0/cpu0/node0/cpu0/node0/cpu0/node0/cpu0/node0/cpu0/node0/cpu0/node0/cpu0/node0/cpu0/node0/cpu0/node0/cpu0/node0/cpu0/node0/cpu0/node0/cpu1/node0/cpu0/node0/cpu1/subsystem/devices/cpu0/node0/cpu0/subsystem/devices/cpu0/subsystem/devices/cpu0/subsystem something went wrong with /sys/bus/cpu/devices/cpu0/node0/cpu0/node0/cpu0/node0/cpu0/node0/cpu0/node0/cpu0/node0/cpu0/node0/cpu0/node0/cpu0/node0/cpu0/node0/cpu0/node0/cpu0/node0/cpu0/node0/cpu1/node0/cpu0/node0/cpu1/subsystem/devices/cpu0/node0/cpu0/subsystem/devices/cpu0/subsystem/devices/cpu0 something went wrong with /sys/bus/cpu/devices/cpu0/node0/cpu0/node0/cpu0/node0/cpu0/node0/cpu0/node0/cpu0/node0/cpu0/node0/cpu0/node0/cpu0/node0/cpu0/node0/cpu0/node0/cpu0/node0/cpu0/node0/cpu1/node0/cpu0/node0/cpu1/subsystem/devices/cpu0/node0/cpu0/subsystem/devices/cpu0/subsystem/devices/cpu1/cache/power

以及我只是按Ctrl-Z'd回到了ipython3了一次又一次，這立即提出了同樣的消息，即使指定目錄是/。爲什麼它從這個相同的區域開始回來？

編輯：代碼

def recursive_search(dr, sf): 
    """searches every potential path from parent directory for files  with  the matching suffix""" 
    l=[]#for all the good little scripts and files with the right last name 
    for name in os.listdir(dr):#for every item in directory 
path=os.path.join(dr, name)#path is now path/to/item 

if os.path.isfile(path): 
    if path.endswith('.',sf)==True: 
    l.append(path) 
else: 
    #try: 
    recursive_search(path, sf) 
    #except: 
    #print ('something went wrong with ', path) 

，如果它找出來怪異，我遇到一些麻煩的格式。

Answer 1

看看文檔爲str.endswith：

>>> help(str.endswith) 
Help on method_descriptor: 

endswith(...) 
    S.endswith(suffix[, start[, end]]) -> bool 

    Return True if S ends with the specified suffix, False otherwise. 
    With optional start, test S beginning at that position. 
    With optional end, stop comparing S at that position. 
    suffix can also be a tuple of strings to try. 

所以調用"path".endswith('.',"py")檢查字符串path如果它與"."開始是從指數之"py"檢查結束，但是"py"是不是一個有效的指數之，因此，錯誤。

要檢查字符串需要字符串相加而不是把它當作另一種說法".py"結束：

path.endswith("."+sf)