我在尝试在计算机上安装Django时遇到了一个奇怪的错误。

这是我在命令行中键入的序列：

C:\Python34>python get-pip.py
Requirement already up-to-date: pip in c:\python34\lib\site-packages
Cleaning up...

C:\Python34>pip install Django
'pip' is not recognized as an internal or external command,
operable program or batch file.

C:\Python34>lib\site-packages\pip install Django
'lib\site-packages\pip' is not recognized as an internal or external command,
operable program or batch file. 

是什么原因造成的？

编辑

根据要求，这是我输入echo％PATH％时得到的结果

C:\Python34>echo %PATH%
C:\Program Files\ImageMagick-6.8.8-Q16;C:\Program Files (x86)\Intel\iCLS Client\
;C:\Program Files\Intel\iCLS Client\;C:\Windows\system32;C:\Windows;C:\Windows\S
ystem32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\
Windows Live\Shared;C:\Program Files (x86)\Intel\OpenCL SDK\2.0\bin\x86;C:\Progr
am Files (x86)\Intel\OpenCL SDK\2.0\bin\x64;C:\Program Files\Intel\Intel(R) Mana
gement Engine Components\DAL;C:\Program Files\Intel\Intel(R) Management Engine C
omponents\IPT;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components
\DAL;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\IPT;C:\P
rogram Files (x86)\nodejs\;C:\Program Files (x86)\Heroku\bin;C:\Program Files (x
86)\git\cmd;C:\RailsInstaller\Ruby2.0.0\bin;C:\RailsInstaller\Git\cmd;C:\RailsIn
staller\Ruby1.9.3\bin;C:\Users\Javi\AppData\Roaming\npm