This article mainly introduces Python and shell variable transfer methods, using environment variables, pipelines and other methods
Python--Shell:
1. Environment variables
Copy CodeThe code is as follows:
Import OS
var=123 or var= ' 123 '
Os.environ[' var ']=str (Var) #environ的键值必须是字符串
Os.system (' echo $var ')
Copy CodeThe code is as follows:
Import OS
var=123 or var= ' 123 '
Os.environ[' var ']=str (Var) #environ的键值必须是字符串
Os.system (' echo $var ')
2. String connection
Copy CodeThe code is as follows:
Import OS
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 a space before the/root
Copy CodeThe code is as follows:
Import OS
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 a space before the/root
3. Through the pipeline
Copy CodeThe code is as follows:
Import OS
Var= ' 123 '
Os.popen (' Wc-c ', ' W '). Write (Var)
Copy CodeThe code is as follows:
Import OS
Var= ' 123 '
Os.popen (' Wc-c ', ' W '). Write (Var)
4. Adoption of documents
Copy CodeThe code is as follows:
Output = open ('/tmp/mytxt ', ' W ')
Output.write (S) #把字符串S写入文件
Output.writelines (L) #将列表L中所有的行字符串写到文件中
Output.close ()
Copy CodeThe code is as follows:
Output = open ('/tmp/mytxt ', ' W ')
Output.write (S) #把字符串S写入文件
Output.writelines (L) #将列表L中所有的行字符串写到文件中
Output.close ()
5. Prepare the output by redirecting the target
Copy CodeThe code is as follows:
BUF = open ('/root/a.txt ', ' W ')
Print >> buf, ' 123\n ', ' abc '
Copy CodeThe code is as follows:
BUF = open ('/root/a.txt ', ' W ')
Print >> buf, ' 123\n ', ' abc '
Or
Copy CodeThe code is as follows:
Print >> 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
Copy CodeThe code is as follows:
Print >> 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-and Python:
1. Piping
Copy CodeThe code is as follows:
Import OS
Var=os.popen (' echo-n 123 '). Read ()
Print Var
Copy CodeThe code is as follows:
Import OS
Var=os.popen (' echo-n 123 '). Read ()
Print Var
2.
Copy CodeThe code is as follows:
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
Copy CodeThe code is as follows:
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
3. Documents
Copy CodeThe code is as follows:
input = open ('/tmp/mytxt ', ' R ')
S = Input.read () #把整个文件读到一个字符串中
S = Input.readline () #读下一行 (over line end flag)
L = Input.readlines () #读取整个文件到一个行字符串的列表中
Copy CodeThe code is as follows:
input = open ('/tmp/mytxt ', ' R ')
S = Input.read () #把整个文件读到一个字符串中
S = Input.readline () #读下一行 (over line end flag)
L = Input.readlines () #读取整个文件到一个行字符串的列表中
Several ways to pass Python and shell variables to each other
