终端中的python3子进程pip“ImportError：无法导入名称main”

Question

我创建了一个脚本（见下文）来升级我所有的 pip 包。我通过 成功执行了我的脚本idle3，即使用打开脚本idle3并按下F5以将脚本作为模块运行。但是，我无法在终端中执行它；得到以下错误。我如何克服这个错误？为什么导入错误发生在终端而不是在idle3？$ python3 -m upgrade_pip_packages ====================================================UPGRADING ALL --USER PIP PACKAGES TO LATEST VERSION:====================================================Traceback (most recent call last):  File "/usr/bin/pip", line 9, in <module>    from pip import mainImportError: cannot import name mainERROR: Command 'pip list' returned non-zero exit status 1我的脚本：upgrade_pip_packages.py#!/bin/python3import subprocessfrom pprint import pprintdef get_pkgs():    try:        cmd = 'pip list'        completed = subprocess.run( cmd, shell=True, check=True,                                    stdout=subprocess.PIPE )    except subprocess.CalledProcessError as err:        print( 'ERROR:', err )    else:        for line in completed.stdout.decode('utf-8').splitlines()[2:]:            yield linedef update_pkgs(piplist):    npackages = 0    nupgrades = 0    nerrors = 0    upgradelist = []    errorlist = []    for i in piplist:        npackages += 1        pkgname, ver = i.split()        print('\n',pkgname)        try:            cmd = 'pip install --user {} --upgrade'.format(pkgname)            completed = subprocess.run( cmd, shell=True, check=True,                                        stdout=subprocess.PIPE )        except subprocess.CalledProcessError as err:            nerrors += 1            errorlist.append(pkgname)            print( 'ERROR: {}'.format(err) )        else:            for line in completed.stdout.decode('utf-8').splitlines():                print(line)                if 'Successfully installed' in line:                    nupgrades +=1                    upgradelist.append(pkgname)    return npackages, nupgrades, nerrors, upgradelist, errorlist