how to create directory named s where s is a string ('mkdir s' will create directory 's')

How does one create directory named s where s is a string ('mkdir s' will create directory 's'), I want to turn the preparser off in this.

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What about the command cd? How can I change directory to s, where s is a string representing a path?

slelievre ( 2012-08-22 07:28:00 +0200 )edit

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You can use os.mkdir (see docs here):

sage: !ls -a 
.  ..
sage: s = "somedirectoryname"
sage: os.mkdir(s)            
sage: !ls -a                 
.  ..  somedirectoryname

DSM's answer is good. Another option: from within Sage, you can also do

sage: from sage.misc.misc import sage_makedirs
sage: sage_makedirs('/tmp/new/directory/here')

This will create any intermediate directories as necessary. (This function runs os.makedirs(...), along with a little error-checking.)

Re the preparser: to turn it off, just do preparser(False), then execute the command, then turn it back on with preparser(True).

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