$ apt-get update$ apt-get install python2.7 python-pip python-dev git libssl-dev libffi-dev build-essential$ pip install --upgrade pip$ pip install --upgrade pwntools當(dāng)我運(yùn)行上述命令安裝 pwntools 后，當(dāng)我轉(zhuǎn)到 python 并導(dǎo)入 pwntools 時(shí)，它顯示以下錯誤。> christos@ubuntu:~$ python Python 2.7.12 (default, Dec  4 2017,> 14:50:18) [GCC 5.4.0 20160609] on linux2 Type "help", "copyright",> "credits" or "license" for more information.> >>> import pwn Traceback (most recent call last):   File "<stdin>", line 1, in <module>   File> "/home/christos/.local/lib/python2.7/site-packages/pwn/__init__.py",> line 4, in <module>>     from pwn.toplevel import *   File "/home/christos/.local/lib/python2.7/site-packages/pwn/toplevel.py",> line 20, in <module>>     import pwnlib   File "/home/christos/.local/lib/python2.7/site-packages/pwnlib/__init__.py",> line 43, in <module>>     importlib.import_module('.%s' % module, 'pwnlib')   File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module>     __import__(name)   File "/home/christos/.local/lib/python2.7/site-packages/pwnlib/dynelf.py",> line 57, in <module>>     from pwnlib import elf   File "/home/christos/.local/lib/python2.7/site-packages/pwnlib/elf/__init__.py",> line 9, in <module>>     from pwnlib.elf.corefile import Core   File "/home/christos/.local/lib/python2.7/site-packages/pwnlib/elf/corefile.py",> line 85, in <module>>     from pwnlib.elf.elf import ELF   File "/home/christos/.local/lib/python2.7/site-packages/pwnlib/elf/elf.py",> line 55, in <module>>     from elftools.elf.enums import ENUM_P_TYPE ImportError: cannot import name ENUM_P_TYPE