安裝和卸載Python2后出現錯誤

Question

我正在使用python 3，但需要安裝python 2進行一些測試。 卸載python2后，如果運行python 3代碼，則會出現以下錯誤：

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'

這是我的代碼：

#!/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)

如您所見，沒有任何東西會使此錯誤出現。 如果我運行一個簡單的hello world程序，則一切正常。

Answer 1

我真的不知道為什么，但是，在sys.flags中沒有名為utf8_mode的屬性。 如果要查看和比較編碼，請嘗試：

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

或者可能：

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

我不確定自己在做什么，因為沒有代碼，所以這是我所能做的限制。

編輯：錯誤似乎在python的lib文件夾內的_bootlocale.py文件上。 我認為從python 2.x來的一些殘余被遺留下來，並且在返回3.x之后並沒有被覆蓋或更新。

我認為卸載然后刪除整個python文件夾，並檢查local_variables以防萬一，在重新安裝python 3.x之前會解決它，盡管我不確定是否會。