Transfer variable method between shell and Python __python

method of passing variables between shell and Python(2013-02-12 18:02:47) reprint

Category: Shell_vim

Python-> Shell:

1. Environment variables

[Python] View plain copy import os var=123 or var= ' 123 ' os.environ[' var ']=str (Var) #environ的键值必须是字符串 Os.syst EM (' echo $var ')

2. String concatenation [Python] view plain copyImportOs path= '/root/a.txt ' var=[1] var= ' bash ' os.system (' echo ' + path) #注意echo后有空格 Os.system (' Echo ' + str (var[0]) os.system (' echo ' + var + '/root/c.sh ') #注意echo后和/root with space before
3. Through the pipeline
[Python] View plain copyImportOs var= ' 123 ' Os.popen (' wc-c ', ' W '). Write (Var)
4. Adoption of the document
[Python] View plain copy output = open ('/tmp/mytxt ', ' W ') Output.write (S) #把字符串S写入文件 output.writelines (L) #将列表L中 All line strings are written to the file Output.close ()
5. Prepare the output through the redirection marker
[Python] View plain copy buf = open ('/root/a.txt ', ' W ')Print>> buf, ' 123\n ', ' abc ' or
[Python] View plain copyPrint>> open ('/root/a.txt ', ' W '), ' 123\n ', ' abc ' #写入或生成文件Print>> open ('/root/a.txt ', ' a '), ' 123\n ', ' abc ' #追加

Shell-> python:

1. Pipe [python]  View Plain copy import  os   var=os.popen (' echo -n  123 '). Read ( )    print  var  
2.
[python]  View Plain copy import  commands   var=commands.getoutput (' Echo  abc ')         #输出结果    var=commands.getstatusoutput (' echo  ABC ')   #退出状态和输出结果