我正在使用macOS High Sierra。过去在某些时候我通过brew安装了Python，但由于某些原因（我不知道）pip无法工作：
$ pip --version Traceback (most recent call last):
File "/usr/local/opt/python2/libexec/bin/pip", line 6, in <module>
from pkg_resources import load_entry_point
File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 3195, in <module>
@_call_aside
File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 3179, in _call_aside
f(*args, **kwargs)
File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 3208, in _initialize_master_working_set
working_set = WorkingSet._build_master()
File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 683, in _build_master
return cls._build_from_requirements(__requires__)
File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 696, in _build_from_requirements
dists = ws.resolve(reqs, Environment())
File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 885, in resolve
raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'pip==9.0.1' distribution was not found and is required by the application
因此我发布了：
$ brew uninstall python@2
Uninstalling /usr/local/Cellar/python@2/2.7.14_1... (3,622 files, 50.6MB)
之后我留下了我认为是python的默认安装
$ which python
/usr/bin/python
不幸的是，我只能通过输入python：
$ python --version
-bash: /usr/local/opt/python2/libexec/bin/python: No such file or directory
然而我可以直接引用它来运行那个python解释器：
$ /usr/bin/python --version
Python 2.7.10
令我感到困扰的是python --version没有用，我想知道这是否是以前在这里安装了一个brew安装版本的python的结果。因此，我决定使用成功的brew install python@2重新安装。
python的假定位置发生了变化：
$ which python
/usr/local/bin/python
但是当我尝试使用它时仍然会出现同样的错误：
$ python --version
-bash: /usr/local/opt/python2/libexec/bin/python: No such file or directory
当然，使用python解释器的完整路径可以正常工作：
$ /usr/local/bin/python --version
Python 2.7.15
任何人都可以帮助我诊断为什么只发出python失败 /usr/local/opt/python2/libexec/bin/python: No such file or directory ，即使 which python 指出python位于/usr/local/bin/python？
编辑：响应者询问运行file的输出，这是输出：
$ file /usr/bin/python
/usr/bin/python: Mach-O universal binary with 2 architectures: [i386:Mach-O executable i386] [x86_64:Mach-O 64-bit executable x86_64]
/usr/bin/python (for architecture i386): Mach-O executable i386
/usr/bin/python (for architecture x86_64): Mach-O 64-bit executable x86_64
$ file /usr/local/bin/python
/usr/local/bin/python: Mach-O 64-bit executable x86_64
编辑：响应者询问brew doctor的输出。这是输出：
Warning: Putting non-prefixed coreutils in your path can cause gmp builds to fail.
Warning: Unbrewed header files were found in /usr/local/include.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae, and may need to be deleted.
Warning: Broken symlinks were found. Remove them with `brew prune`:
/usr/local/bin/apm
/usr/local/bin/atom
编辑：输出PATH，有趣的是 / usr / local / opt / python2 / libexec / bin 在那里
$ echo $PATH
/usr/local/opt/coreutils/libexec/gnubin:/Applications/google-cloud-sdk/bin:/usr/local/opt/python2/libexec/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/share/dotnet:/Applications/Wireshark.app/Contents/MacOS
$ ls /usr/local/opt/python2/libexec/bin
ls: cannot access '/usr/local/opt/python2/libexec/bin': No such file or directory
$ ls /usr/local/opt/python2/libexec
pip setuptools wheel
答案 0 :(得分：1)
解决方案可能只是从PATH环境变量中删除~/.bash_profile。
要执行此操作，您必须编辑df.toPandas().to_csv("/dbfs/<path>/df.csv", mode='w+', encoding='utf-8')
server = smtplib.SMTP('smtp.gmail.com:587')
server.ehlo()
server.starttls()
server.login("<email>", "<password>")
sender = "<email>"
recipient = "<email>"
msg = MIMEMultipart()
msg['Subject'] = 'I need help'
msg['From'] = sender
msg['To'] = recipient
filedata = sc.textFile("/dbfs/<path>/df.csv", use_unicode=False)
msg.attach(MIMEText('This is your test message with attachment...'))
part = MIMEApplication("".join(filedata.collect()), Name="df.csv")
part['Content-Disposition'] = 'attachment; filename="%s"' % 'df.csv'
msg.attach(part)
server.sendmail(sender, [recipient], msg.as_string())
server.close()
并删除此目录的出现。