First, create a new file in Python with an integer from 0 to 9, one for each number:
Copy Code code as follows:
#python
>>>f=open (' F.txt ', ' W ') # R Read Only, W writable, a append
>>>for i in range (0,10): F.write (str (i) + ' \ n ')
. . .
>>> F.close ()
Second, the file content is appended, from 0 to 9 of 10 random integers:
Copy Code code as follows:
#python
>>>import Random
>>>f=open (' F.txt ', ' a ')
>>>for i in range (0,10): F.write (str (random.randint (0,9))
. . .
>>>f.write (' \ n ')
>>>f.close ()
Third, the contents of the file appended, from 0 to 9 of random integers, 10 digit line, a total of 10 lines:
Copy Code code as follows:
#python
>>> Import Random
>>> f=open (' f.txt ', ' a ')
>>> for I in Range (0,10):
. . . For I in Range (0,10): F.write (str (random.randint (0,9))
. . . F.write (' \ n ')
. . .
>>> F.close ()
Iv. directing standard output to file:
Copy Code code as follows:
#python
>>> Import Sys
>>> sys.stdout = open ("Stdout.txt", "W")
Example:
View the 22 port condition and write the result to A.txt
Copy Code code as follows:
#!/usr/bin/python
#coding =utf-8
Import OS
Import time
Import Sys
F=open (' a.txt ', ' a ')
F.write (Os.popen (' netstat-nltp | grep '). Read ())
F.close ()
