Tearful begging-php calls the system command. the shell can run successfully, but it won't work through the browser. how can this problem be solved?

Tearful begging-php calls the system command, shell can run successfully, but not through the browser & lt ;? Php $ cmd = & quot; python1.py-ta-fb & quot; system ($ cmd, $ ret );? & Gt; this code, if you directly use php in the shell to cry-php calls the system command, the shell can run successfully, but not through the browser
$ Cmd = "python 1.py-t a-f B ";
System ($ cmd, $ ret );
?>

This code, if you use php-f a directly in the shell. php and ret can return 0 successfully, but when accessed through a browser, 1.py fails to be executed, ret returns 1, you guys, what is going on? I am about to crash ~~~~~

------ Solution --------------------
There is no operation permission. attach sudo to your host and then:
$ Cmd = "sudo python 1.py-t a-f B"; // switch to the root operation permission
------ Solution --------------------
If the Permission problem occurs in linux, the web permission is another permission when running the command line.