安装和卸载Python2后出现错误

Question

我正在使用python 3，但需要安装python 2进行一些测试。 卸载python2后，如果运行python 3代码，则会出现以下错误：

Failed to import the site module
Traceback (most recent call last):
  File "C:\Users\2325\AppData\Local\Programs\Python\Python37\lib\site.py", line 570, in <module>
main()
  File "C:\Users\2325\AppData\Local\Programs\Python\Python37\lib\site.py", line 557, in main
known_paths = addsitepackages(known_paths)
  File "C:\Users\2325\AppData\Local\Programs\Python\Python37\lib\site.py", line 349, in addsitepackages
addsitedir(sitedir, known_paths)
  File "C:\Users\2325\AppData\Local\Programs\Python\Python37\lib\site.py", line 207, in addsitedir
    addpackage(sitedir, name, known_paths) 
 File "C:\Users\2325\AppData\Local\Programs\Python\Python37\lib\site.py", line 159, in addpackage
f = open(fullname, "r")
  File "C:\Users\2325\AppData\Local\Programs\Python\Python37\lib\_bootlocale.py", line 12, in getpreferredencoding
if sys.flags.utf8_mode:
AttributeError: 'sys.flags' object has no attribute 'utf8_mode'
Failed to import the site module
Traceback (most recent call last):
  File "C:\Users\2325\AppData\Local\Programs\Python\Python37\lib\site.py", line 570, in <module>
    main()
  File "C:\Users\2325\AppData\Local\Programs\Python\Python37\lib\site.py", line 557, in main
known_paths = addsitepackages(known_paths)
  File "C:\Users\2325\AppData\Local\Programs\Python\Python37\lib\site.py", line 349, in addsitepackages
addsitedir(sitedir, known_paths)
  File "C:\Users\2325\AppData\Local\Programs\Python\Python37\lib\site.py", line 207, in addsitedir
addpackage(sitedir, name, known_paths)
  File "C:\Users\2325\AppData\Local\Programs\Python\Python37\lib\site.py", line 159, in addpackage
f = open(fullname, "r")
  File "C:\Users\2325\AppData\Local\Programs\Python\Python37\lib\_bootlocale.py", line 12, in getpreferredencoding
if sys.flags.utf8_mode:
AttributeError: 'sys.flags' object has no attribute 'utf8_mode'

这是我的代码：

#!/usr/bin/env python3
# encoding: utf-8

import json, argparse, subprocess

argparser = argparse.ArgumentParser(description="Executes every task")
argparser.add_argument('--taskjson', type=str, required=True    help="Required Json with tasks")
args = argparser.parse_args()

with open(args.taskjson) as f:
     data=json.load(f)
     data=data["tasks"]

     locationoffiletoget = [None]*len(data)
     locationoffiletoput = [None]*len(data)
     nameoffiletoget = [None]*len(data)
     nameoffiletoput = [None]*len(data)
     nameofsheettoput = [None]*len(data)
     nameofsheettoget = [None]*len(data)
     putdataunder = [None]*len(data)
     putdatabehind = [None]*len(data)
     rowstoskipatgetfile = [None]*len(data)
     thingsToReplace = [None]*len(data)
     formatget = [None]*len(data)
     formatput = [None]*len(data)
     columnsToFormatToDate = [None]*len(data)


    for i in range(0,len(data)):            
        subprocess.call(["ExecutingScript.py",\                         
                     data[i]["locationoffiletoget"],\
                     data[i]["locationoffiletoput"],\
                     data[i]["nameoffiletoget"],\
                     data[i]["nameoffiletoput"],\
                     data[i]["nameofsheettoput"],\
                     data[i]["nameofsheettoget"],\
                     data[i]["putdataunder"],\
                     data[i]["putdatabehind"],\
                     data[i]["rowstoskipatgetfile"],\
                     data[i]["formatget"],\
                     data[i]["formatput"],\
                     data[i]["columnsToFormatToDate"]], shell=True)

如您所见，没有任何东西会使此错误出现。 如果我运行一个简单的hello world程序，则一切正常。

Answer 1

我真的不知道为什么，但是，在sys.flags中没有名为utf8_mode的属性。 如果要查看和比较编码，请尝试：

if sys.getdefaultencoding() == 'utf-8':
    continue

或者可能：

if sys.getfilesystemencoding() == 'utf-8':
    continue

我不确定自己在做什么，因为没有代码，所以这是我所能做的限制。

编辑：错误似乎在python的lib文件夹内的_bootlocale.py文件上。 我认为从python 2.x来的一些残余被遗留下来，并且在返回3.x之后并没有被覆盖或更新。

我认为卸载然后删除整个python文件夹，并检查local_variables以防万一，在重新安装python 3.x之前会解决它，尽管我不确定是否会。