import subprocess compilePopen = subprocess.Popen('gcc haha',shell=True,stderr=subprocess.PIPE) compilePopen.wait() print('the status code is:',compilePopen.returncode) with open('log','w') as object: object.write(compilePopen.stderr.read()) https://blog.csdn.net/qq_31331027/article/details/80518348 <html> <body> <script type="text/javascript"> var arr = new Array(6) arr[0] = "George" arr[1] = "John" arr[2] = "Thomas" arr[3] = "James" arr[4] = "Adrew" arr[5] = "Martin" document.write(arr + "<br />") document.write(arr.sort()) </script> </body> </html> <html> <body> <script type="text/javascript"> var x var mycars = new Array() mycars[0] = "Saab" mycars[1] = "Volvo" mycars[2] = "BMW" for (x in mycars) { document.write(mycars[x] + "<br />") } </script> </body> </html>