学步园

代码如下:

#encoding=utf-8

print '中国'

#动态改变Python的搜索路径
import sys,os
def AddSysPath(new_path):
    if not os.path.exists(new_path):return -1
    new_path = os.path.abspath(new_path)
    if sys.platform == 'win32':
        new_path = new_path.lower()
    for x in sys.path:
        x = os.path.abspath(x)
        if sys.platform == 'win32':
            x = x.lower()
        if new_path in (x, x + os.sep):
            return 0
    sys.path.append(new_path)
    return 1

print 'before'

for x in sys.path:
    print x

AddSysPath(r'D:\DBDownload')

print 'after'
for x in sys.path:
    print x

打印结果如下：

中国
before
F:\workspace\StudyPy\src\basic
F:\workspace\StudyPy\src
D:\Python27\DLLs
D:\Python27\lib
D:\Python27\lib\plat-win
D:\Python27\lib\lib-tk
D:\Python27
D:\Python27\lib\site-packages
C:\Windows\system32\python27.zip
after
F:\workspace\StudyPy\src\basic
F:\workspace\StudyPy\src
D:\Python27\DLLs
D:\Python27\lib
D:\Python27\lib\plat-win
D:\Python27\lib\lib-tk
D:\Python27
D:\Python27\lib\site-packages
C:\Windows\system32\python27.zip
d:\dbdownload