[Python编程(第4版)].(Programming.Python.4th.Edition).Mark.Lutz.文字版

C:\temp> C:\...\PP4E\System\Filetools\split.py python-3.1.msi tempsplit 500000

Splitting C:\temp\python-3.1.msi to C:\temp\tempsplit by 500000

Split finished: 28 parts are in C:\temp\tempsplit

C:\temp> dir tempsplit

...more...

Directory of C:\temp\tempsplit

02/21/2010 01:27 PM <DIR>.

02/21/2010 01:27 PM <DIR> ..

02/21/2010 01:27 PM 500,000 part0001

02/21/2010 01:27 PM 500,000 part0002

02/21/2010 01:27 PM 500,000 part0003

02/21/2010 01:27 PM 500,000 part0004

02/21/2010 01:27 PM 500,000 part0005

...more lines omitted...

02/21/2010 01:27 PM 500,000 part0024

02/21/2010 01:27 PM 500,000 part0025

02/21/2010 01:27 PM 500,000 part0026

02/21/2010 01:27 PM 500,000 part0027

02/21/2010 01:27 PM 314,272 part0028

28 File(s) 13,814,272 bytes

2 Dir(s) 188,671,946,752 bytes free

The split can take noticeably longer to finish, but only if the part file’s size is set small
enough to generate thousands of part files—splitting into 1,382 parts works but runs
slower (though some machines today are quick enough that you might not notice):

C:\temp> C:\...\PP4E\System\Filetools\split.py python-3.1.msi tempsplit 10000

Splitting C:\temp\python-3.1.msi to C:\temp\tempsplit by 10000

Split finished: 1382 parts are in C:\temp\tempsplit

C:\temp> C:\...\PP4E\System\Filetools\join.py tempsplit manypy31.msi

Joining C:\temp\tempsplit to make C:\temp\manypy31.msi

Join complete: see C:\temp\manypy31.msi

C:\temp> fc /B python-3.1.msi manypy31.msi

Comparing files python-3.1.msi and MANYPY31.MSI

FC: no differences encountered

C:\temp> dir tempsplit

...more...

Directory of C:\temp\tempsplit

02/21/2010 01:40 PM <DIR>.

02/21/2010 01:40 PM <DIR> ..

02/21/2010 01:39 PM 10,000 part0001

02/21/2010 01:39 PM 10,000 part0002

02/21/2010 01:39 PM 10,000 part0003

02/21/2010 01:39 PM 10,000 part0004

02/21/2010 01:39 PM 10,000 part0005

Splitting and Joining Files | 291