[Level 2] Pexpect of Python. 

#!/bin/env python
import os, sys
import StringIO


class AuthorizedKeyError(Exception):
    def __init__(self, host):
        self.value = 'Did not be authorized by remote server(%s)!!!' % host
    def __str__(self):
        return repr(self.value)

class FileSyncManager:
    def fileSync(self, user, host, file):
        output = StringIO.StringIO()
        sCmd = 'scp %s %s@%s:%s' % (file, user, host, file)
        self.debug(sCmd)
        
        scp = pexpect.spawn(sCmd)
        scp.logfile = output
        
        while True:
            index = scp.expect(["Are you sure you want to continue connecting (yes/no)?", "password:" ,pexpect.TIMEOUT, pexpect.EOF]) 
            if index == 0: 
                scp.sendline('yes')
            elif index == 1:
                raise AuthorizedKeyError(host)
            else:
                break
            
        if scp.exitstatus:
            error_message = output.getvalue().rstrip()
            self.debug(error_message)
            print error_message
            
        scp.close(True)

Wish this helps.  regards, Stanley Huang












































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If you want to implement iif in Python,  please refer to the following sample code:  #!/bin/env python def iif(b):   return 'It\'s True' if b else 'It\'s False'  print iif(True) print iif(False) And the following sample, guess what will you get!  #!/bin/env python b = True print 'b: %s' % 'Ture' if b else 'False' b = False print 'b: %s' % 'Ture' if b else 'False' Result:  $ ./iif.py  b: Ture False The second result is "False", not "b: False". Why???  Because the prededence of string concatenation is higher than if.  Therefore you need to use () to make it correct.  #!/bin/env python b = True print 'b: %s' % 'Ture' if b else 'False' b = False print 'b: %s' % ('Ture' if b else 'False') Wish this helps.   regards,  Stanley Huang








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