Source Code for Module roslaunch.param_dump

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33   
34  """ 
35  Dumps parameters from ROSLaunch files to stdout as YAML. 
36  """ 
37   
38  import sys 
39   
40  import roslaunch.config 
41  import roslaunch.xmlloader  
42   
43  import yaml 
44   
45 -def dump_params(files): 
46      """ 
47      Dumps ROS parameters of a list of files to STDOUT in YAML 
48       
49      @param files: List of ROSLaunch files to load 
50      @type  files: [ str ] 
51      @return: True if loaded parameters successfully 
52      @rtype: bool 
53      """ 
54      config = roslaunch.config.ROSLaunchConfig() 
55      loader = roslaunch.xmlloader.XmlLoader() 
56   
57      for f in files: 
58          try: 
59              loader.load(f, config, verbose = False) 
60          except Exception as e: 
61              sys.stderr.write("Unable to load file %s: %s" % (f, e)) 
62              return False 
63   
64      # Now print params in YAML format. 
65      params_dict = {} 
66      for k, v in config.params.items(): 
67          params_dict[str(k)] = v.value 
68      sys.stdout.write(yaml.safe_dump(params_dict)+'\n') 
69      return True 
70