当使用open（）时出现“ValueError：embedded null character”

Question

我在学院学习python，但我坚持使用我当前的任务。我们应该采取2个文件并进行比较。我只是试图打开文件，这样我可以使用他们，但我不断收到错误"ValueError: embedded null character"

file1 = input("Enter the name of the first file: ") 
file1_open = open(file1) 
file1_content = file1_open.read() 

这个错误是什么意思？

Answer 1

Python 3.5文件的缺省编码是'utf-8'。

用于Windows的文件的默认编码往往是别的。

如果你打算开两个文本文件，可以试试这个：

import locale 
locale.getdefaultlocale() 
file1 = input("Enter the name of the first file: ") 
file1_open = open(file1, encoding=locale.getdefaultlocale()[1]) 
file1_content = file1_open.read() 

应该有标准库的一些自动检测。

否则你就可以创造自己的：

def guess_encoding(csv_file): 
    """guess the encoding of the given file""" 
    import io 
    import locale 
    with io.open(csv_file, "rb") as f: 
     data = f.read(5) 
    if data.startswith(b"\xEF\xBB\xBF"): # UTF-8 with a "BOM" 
     return "utf-8-sig" 
    elif data.startswith(b"\xFF\xFE") or data.startswith(b"\xFE\xFF"): 
     return "utf-16" 
    else: # in Windows, guessing utf-8 doesn't work, so we have to try 
     try: 
      with io.open(csv_file, encoding="utf-8") as f: 
       preview = f.read(222222) 
       return "utf-8" 
     except: 
      return locale.getdefaultlocale()[1] 

然后

file1 = input("Enter the name of the first file: ") 
file1_open = open(file1, encoding=guess_encoding(file1)) 
file1_content = file1_open.read()