grep、egrep、fgrep
转自http://blog.chinaunix.net/uid-7374279-id-3849705.html一、grep家族简介1、Unix的grep家族包括：grep、egrep和fgrep1）grep（1）grep （global search regular expression(RE) and print out the line，全面搜索正则表达式并把行
瘦瘦眼神
![python笔记print(3 and 4)print(3 or 4)number=1print(number + 4 <=12 or number +4 - 12)a=3000print(id(a))b=-3000print(id(b))form sys import getrefcounta=[1,2,3]print(getrefcount(a))b=aprint(getrefcount(a))c=[a,a]print(getrefcount(a))del aprint(“a被销毁”)str](/uploads/reation/bcimg12.png)
python笔记print(3 and 4)print(3 or 4)number=1print(number + 4 <=12 or number +4 - 12)a=3000print(id(a))b=-3000print(id(b))form sys import getrefcounta=[1,2,3]print(getrefcount(a))b=aprint(getrefcount(a))c=[a,a]print(getrefcount(a))del aprint(“a被销毁”)str
刘大坑python笔记print(3 and 4)print(3 or 4)number=1print(number + 4 <=12 or number +4 - 12)a=3000print(id(a))b=-3000print(id(b))form sys import getrefcounta=[1,2,3]print(getrefcount(a))b=aprint(getrefcount(a))c=[a,a]print(getrefcount(a))del
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