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This article introduces the knowledge of "how python os.system executes cmd instructions". In the operation of actual cases, many people will encounter such a dilemma. Next, let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

1. Execute the cmd instruction, and the output in cmd will be output directly on the console. A result of 0 indicates that the execution is successful.

2. After calling the shell script, a 16-bit binary number is returned. The low bit is the signal number that kills the called script, and the high bit is the exit status code of the script.

The os.system () method simply executes the cmd instruction rudely, and there is no way to get the contents of the cmd output.

Example

# what are the data types of coding:utf-8 import os os.system ("ls") python? the data types of python:

1. Numeric types, including int (integer), long (long integer), and float (floating point).

two。 String, which is of type str and type unicode, respectively.

3. Boolean, Python Boolean is also used for logical operations and has two values: True (true) and False (false). 4. List, the list is the most frequently used data type in Python, and any data type can be placed in the collection.

5. Tuples are identified by "()", and internal elements are separated by commas.

6. A dictionary is a collection of key-value pairs.

7. A collection is an unordered, non-repeating combination of data.

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