[processing][API] rename alglist() to printAlgorithms() to improve

readability. Also introduce algorithmsList() call which returns
available Processing algorithms as list

python/plugins/processing/tools/general.py

@@ -41,18 +41,38 @@ from processing.core.parameters import ParameterSelection
 from processing.gui.Postprocessing import handleAlgorithmResults
 
 
-def alglist(text=None):
+def algorithmsList(text=None):
+    """Returns list of all available Processing algorithms or list
+    of algorithms which names contains given text.
+    Returned list contains algorithm command-line names.
+    """
+    lst = []
+    for provider in list(algList.algs.values()):
+        sortedlist = sorted(list(provider.values()), key=lambda alg: alg.name)
+        for alg in sortedlist:
+            if text is None or text.lower() in alg.name.lower():
+                lst.append(alg.commandLineName())
+    return lst
+
+
+def printAlgorithms(text=None):
+    """Print list of all available Processing algorithms or list
+    of algorithms which names contains given text.
+    Prints algorithms user-friendly names as well as command-line
+    names.
+    """
     s = ''
     for provider in list(algList.algs.values()):
         sortedlist = sorted(list(provider.values()), key=lambda alg: alg.name)
         for alg in sortedlist:
             if text is None or text.lower() in alg.name.lower():
-                s += alg.name.ljust(50, '-') + '--->' + alg.commandLineName() \
-                    + '\n'
+                s += '{}--->{}\n'.format(alg.name.ljust(50, '-'), alg.commandLineName())
     print(s)
 
 
 def algorithmOptions(name):
+    """Prints all algorithm options with their values.
+    """
     alg = Processing.getAlgorithm(name)
     if alg is not None:
         opts = ''
@@ -67,6 +87,9 @@ def algorithmOptions(name):
 
 
 def algorithmHelp(name):
+    """Prints algorithm parameters with their types. Also
+    provides information about options if any.
+    """
     alg = Processing.getAlgorithm(name)
     if alg is not None:
         alg = alg.getCopy()
@@ -77,12 +100,18 @@ def algorithmHelp(name):
 
 
 def runalg(algOrName, *args, **kwargs):
+    """Executes given algorithm and returns its outputs as dictionary
+    object.
+    """
     alg = Processing.runAlgorithm(algOrName, None, *args, **kwargs)
     if alg is not None:
         return alg.getOutputValuesAsDictionary()
 
 
 def runandload(name, *args, **kwargs):
+    """Executes given algorithm and load its results into QGIS project
+    when possible.
+    """
     return Processing.runAlgorithm(name, handleAlgorithmResults, *args, **kwargs)