import sys
print sys.path
sys.path+=['D:\\zjm_code']
print sys.path
it can’t be save,how does do it.
import sys print sys.path sys.path+=[‘D:\\zjm_code’] print sys.path it can’t be save,how does do it.
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import sys
print sys.path
sys.path+=['D:\\zjm_code']
print sys.path
it can’t be save,how does do it.
Where is environment variable
PYTHONPATHdefined in your working environment?In Unix-like systems it would be in a bash script such as
~/.bashrc.In Windows it could be a
.BATor.CMDfile but more often will be in the registry.“Saving” a setting of
PYTHONPATHto a file is easy.Writing to the Windows registry is much harder, alas. Doable, yes, but, if you get it in the least wrong, you’re likely to make your whole machine unusable.
In your
site-packagesdirectory (which should itself be insys.path) you can create a file namedsitecustomize.pythat is automatically imported, if it exists, each time a Python program starts. I suggest that this is simpler and less risky than messing with the registry. So, write yoursys.pathmanipulations to such asitecustomize.pyfile.