pycharm出错总结-》编码问题

• 下面的错误比较奇葩，用注释代码排错的方法，哪怕全部代码都注释掉，只写一个print语句依然报错，只能说莫名其妙，报错内容如下，解决方法就是新建一个文件，把该文件里面的东西全部都拷贝过去

Traceback (most recent call last):
  File "C:\Users\jiangkainan\Anaconda3\lib\tokenize.py", line 390, in find_cookie
    line_string = line.decode('utf-8')
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xfe in position 0: invalid start byte
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File "C:\Users\jiangkainan\Anaconda3\lib\site-packages\IPython\core\interactiveshell.py", line 2963, in run_code
    exec(code_obj, self.user_global_ns, self.user_ns)
  File "<ipython-input-2-23739638b0a2>", line 1, in <module>
    runfile('D:/Documents/_source/pycharm/1.py', wdir='D:/Documents/_source/pycharm')
  File "C:\Program Files\JetBrains\PyCharm 2018.2.3\helpers\pydev\_pydev_bundle\pydev_umd.py", line 197, in runfile
    pydev_imports.execfile(filename, global_vars, local_vars)  # execute the script
  File "C:\Program Files\JetBrains\PyCharm 2018.2.3\helpers\pydev\_pydev_imps\_pydev_execfile.py", line 11, in execfile
    stream = tokenize.open(file)  # @UndefinedVariable
  File "C:\Users\jiangkainan\Anaconda3\lib\tokenize.py", line 454, in open
    encoding, lines = detect_encoding(buffer.readline)
  File "C:\Users\jiangkainan\Anaconda3\lib\tokenize.py", line 431, in detect_encoding
    encoding = find_cookie(first)
  File "C:\Users\jiangkainan\Anaconda3\lib\tokenize.py", line 395, in find_cookie
    raise SyntaxError(msg)
  File "<string>", line None
SyntaxError: invalid or missing encoding declaration for 'D:/Documents/_source/pycharm/1.py'