added os.system()

Author: glaukiol1

main

@@ -5,7 +5,9 @@ package os
 // license that can be found in the LICENSE file.
 
 import (
+	"fmt"
 	"os"
+	"os/exec"
 	"reflect"
 	"strings"
 
@@ -22,6 +24,7 @@ func init() {
 		py.MustNewMethod("putenv", putenv, 0, "Set the environment variable named key to the string value."),
 		py.MustNewMethod("unsetenv", unsetenv, 0, "Unset (delete) the environment variable named key."),
 		py.MustNewMethod("_exit", _exit, 0, "Immediate program termination."),
+		py.MustNewMethod("system", system, 0, "Run shell commands, prints stdout directly to deault"),
 	}
 
 	globals := py.StringDict{
@@ -192,3 +195,30 @@ func _exit(self py.Object, args py.Tuple) (py.Object, error) { // can never retu
 		return nil, nil
 	}
 }
+
+// os.system(command string) this function runs a shell command and directs the output to standard output.
+func system(self py.Object, args py.Tuple) (py.Object, error) {
+	if len(args) == 0 {
+		return nil, py.ExceptionNewf(py.TypeError, "Expected 1 or more arguments all of type string")
+	} else {
+		var cargs []string
+		if reflect.TypeOf(args[0]).String() == "py.String" {
+			_carg, err := py.ReprAsString(args[0])
+			if err != nil {
+				return nil, py.ExceptionNewf(py.TypeError, "Unable to parse string") // this will never execute
+			}
+			carg := strings.ReplaceAll(_carg, "'", "") // required
+
+			cargs = strings.Split(carg, " ")
+		} else {
+			return nil, py.ExceptionNewf(py.TypeError, "Expected 1 or more arguments all of type string")
+		}
+		command := exec.Command(cargs[0])
+		outb, err := command.Output()
+		if err != nil {
+			return nil, py.ExceptionNewf(py.OSError, err.Error())
+		}
+		fmt.Println(string(outb))
+		return py.Int(0), nil
+	}
+}

os/os.module.go

@@ -1,4 +1,5 @@
 import os
+import time
 
 class bcolors:
     HEADER = '\033[95m'
@@ -22,6 +23,7 @@ class bcolors:
 print('getenv("TEST_VAR"):', os.getenv("TEST_VAR")) # get TEST_VAR value
 print('unsetenv("TEST_VAR"):', os.unsetenv("TEST_VAR")) # unset TEST_VAR
 print('getenv("TEST_VAR"):',os.getenv("TEST_VAR")) # get TEST_VAR after it has been deleted
+print('system("ls .")', os.system("ls ."))
 print()
 print("--------------")
 print()
@@ -106,6 +108,18 @@ def _fail(test_name):
     _fail('os.getenv("TEST_VAR") == None')
     failed+=1
 
+print(bcolors.ENDC+bcolors.BOLD+bcolors.HEADER+"Please check if $HOME will be outputted...")
+print(bcolors.ENDC)
+
+if os.system("pwd") == 0:
+    _pass('os.system("pwd")')
+    passed_tests+=1
+else:
+    _fail('os.system("pwd")')
+    failed+=1
+
+time.sleep(2)
+
 print()
 print(bcolors.ENDC+bcolors.BOLD+bcolors.HEADER+"----- Results -----")
 print(bcolors.OKGREEN+bcolors.BOLD, "PASSED: "+str(passed_tests)+" out of "+str(passed_tests+failed))