????е?Python????

???????????Linux/Unix????????????Windows?????????????????б????檔??????????????chmod?????????????е???????? ???? ????

$ chmod a+x helloworld.py
$ ./helloworld.py
Hello World

chmod???????? ??? ????? ?? ?????????????????????????????ɡ??????????????????????????λ??????г??????????./????????λ????????

??????????Щ??????????????????????helloworld?????????./helloworld???????????????????????????????????????????????????????????????????????г???

?????????????λ????????????????г??????????????????????????????????λ??????????????????????????????????PATH?????????е?????????????????κγ??????????????PATH?????????е???????????????????????????????????????????PATH???????????????????????κ?λ??????????

$ echo $PATH
/opt/mono/bin/:/usr/local/bin:/usr/bin:/bin:/usr/X11R6/bin:/home/swaroop/bin
$ cp helloworld.py /home/swaroop/bin/helloworld
$ helloworld
Hello World

?????????echo?????????PATH????????$????????????????shell?????????????????????????????/home/swaroop/bin??PATH?????е???????swaroop???????????????????????????????????????????????????????????????????????PATH???????????????????????PATH=$PATH:/home/swaroop/mydir???????С?/home/swaroop/mydir?????????????PATH?????е?????

??????????κ?????κε?????????????????????????????á???????????????????????cd??????Linux????DOS???????????????

???
????Python??????????????????????????????????