Revert pythong deps

plugins/extensions/Python/python.qbs

@@ -21,7 +21,24 @@ Project {
             property string sourceDir: project.sourceDirectory + "/pylibs"
 
             configure: {
-                
+                if (!requirementsFile.length) {
+                    return
+                }
+                // we use the Process service to run pip3
+                var p = new Process();
+                try {
+                    p.setWorkingDirectory(path)
+                    // override pip's idea of --user location
+                    p.setEnv("PYTHONUSERBASE", sourceDir)
+                    // Finally run pip
+                    if (p.exec("/usr/bin/pip3", ["install", "-r", requirementsFile, "--user"] , true) === 0) {
+                        installed = true
+                    } else {
+                        throw "Pip Not working"
+                    }
+                } finally {
+                    p.close()
+                }
             }
         }
 
@@ -85,4 +102,4 @@ Project {
             qbs.installSourceBase: path
         }
     }
-}
+}
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