Python：TypeError：需要一個整數

Question

我想獲取某些文件的md5校驗和並將它們寫入臨時文件。

import os 
import hashlib 

PID = str(os.getpid()) 
manifest = open('/temp/tmp/MANIFEST.'+ PID + '.tmp','w') #e.g. MANIFEST.48938.tmp 
for elmt in files_input: 
    input = open(elmt['file'], "r", 'us-ascii') #'us-ascii' when I ran "file --mime" 
    manifest.write(hashlib.md5(input.read()).hexdigest()) 

從此，我感到我還沒有能夠解決一個Python錯誤：

Traceback (most recent call last): 
File "etpatch.py", line 131, in <module> 
    input = open(elmt['file'], "r", 'us-ascii') 
TypeError: an integer is required 

一些人不得不從這樣的錯誤「從OS進口*」，但我不這樣做我也不會在任何其他模塊上使用導入*。

Answer 1

的第三個參數open()預期爲一個整數：

open(name[, mode[, buffering]]) 

The optional buffering argument specifies the file’s desired buffer size: 0 means unbuffered, 1 means line buffered, any other positive value means use a buffer of (approximately) that size (in bytes). A negative buffering means to use the system default, which is usually line buffered for tty devices and fully buffered for other files. If omitted, the system default is used. [2]