標籤:
(1) os.system
# 僅僅在一個子終端運行系統命令,而不能擷取命令執行後的返回資訊
system(command) -> exit_status
Execute the command (a string) in a subshell.
# 如果再命令列下執行,結果直接列印出來
1 >>> os.system(‘ls‘)2 3 04101419778.CHM bash document media py-django video4 5 11.wmv books downloads Pictures python6 7 all-20061022 Desktop Examples project tools
(2) os.popen
# 該方法不但執行命令還返回執行後的資訊對象
popen(command [, mode=‘r‘ [, bufsize]]) -> pipe
Open a pipe to/from a command returning a file object.
例如:
1 >>>tmp = os.popen(‘ls *.py‘).readlines() 2 3 >>>tmp 4 5 Out[]: 6 7 [‘dump_db_pickle.py ‘, 8 9 ‘dump_db_pickle_recs.py ‘,10 11 ‘dump_db_shelve.py ‘,12 13 ‘initdata.py ‘,14 15 ‘__init__.py ‘,16 17 ‘make_db_pickle.py ‘,18 19 ‘make_db_pickle_recs.py ‘,20 21 ‘make_db_shelve.py ‘,22 23 ‘peopleinteract_query.py ‘,24 25 ‘reader.py ‘,26 27 ‘testargv.py ‘,28 29 ‘teststreams.py ‘,30 31 ‘update_db_pickle.py ‘,32 33 ‘writer.py ‘]
好處在於:將返回的結果賦於一變數,便於程式的處理。
Python os.system 和 os.popen的區別