Scapy OSError when importing scapy.all: 'wpcap.dll' does not exsist
Question: I tried to import `scapy.all`, but an error saying 'wpcap.dll' does not exist.
Why does this happen? I am sure I downloaded everything correctly. I saved
everything into a folder called `scapy` . I got an OSError from module
`ctypes`. Does Python expect me to have something pre-installed?

This is my error (I used scapy.scapy.all since I saved it into a folder)

    
    
    >>> import scapy.scapy.all
    WARNING: Windows support for scapy3k is currently in testing. Sniffing/sending/receiving packets should be working with WinPcap driver and Powershell. Create issues at https://github.com/phaethon/scapy
    Traceback (most recent call last):
      File "<pyshell#12>", line 1, in <module>
        import scapy.scapy.all
      File "C:\Python34\scapy\scapy\all.py", line 16, in <module>
        from .arch import *
      File "C:\Python34\scapy\scapy\arch\__init__.py", line 88, in <module>
        from .windows import *
      File "C:\Python34\scapy\scapy\arch\windows\__init__.py", line 23, in <module>
        from scapy.scapy.arch import pcapdnet
      File "C:\Python34\scapy\scapy\arch\pcapdnet.py", line 32, in <module>
        from .winpcapy import *
      File "C:\Python34\scapy\scapy\arch\winpcapy.py", line 26, in <module>
        _lib=CDLL('wpcap.dll')
      File "C:\Python34\lib\ctypes\__init__.py", line 351, in __init__
        self._handle = _dlopen(self._name, mode)
    OSError: [WinError 126] The specified module could not be found
    >>> 
    


Answer: Make sure you have [WinPcap](http://www.winpcap.org/) installed in order to
use scapy.

