Added change_key_in_dict_file() to write new value for key in the filePathName file.

tools/oneclick/base/common_dict_file.py

@@ -148,6 +148,7 @@ class CommonDictFile:
         return file_dict
 
     def write_dict_file(self, dicts, filePathNames, keySeparator=None):
+        """Write the dictionary information to the filePathName file."""
         if keySeparator==None: keySeparator=self.CDF_SEPARATOR
         for fpn, the_dict in zip(cm.listify(filePathNames), cm.listify(dicts)):
             with open(fpn, 'w') as fp:
@@ -155,6 +156,7 @@ class CommonDictFile:
                     fp.write('%s%s%s\n' % (key, keySeparator, the_dict[key]))
 
     def append_key_to_dict_file(self, filePathName, key, values):
+        """Write append the key = value pair to the filePathName file."""
         with open(filePathName, 'a') as fp:
             if len(cm.listify(values))==1:
                 fp.write('%s = %s' % (key, values))
@@ -163,10 +165,33 @@ class CommonDictFile:
                 for v in cm.listify(values):
                     fp.write('%s\n' % v)
 
+    def change_key_in_dict_file(self, filePathName, key, value):
+        """Write new value for key in the filePathName file. The original key = value pair must fit on one line."""
+        # Read dict file into string
+        with open(filePathName, 'r') as fp:
+            dict_string = fp.read()
+        # Modify key value in dict string
+        key_start = dict_string.find(key)                                 # find key
+        if key_start>0:
+            separator = dict_string.find(self.CDF_SEPARATOR, key_start)   # find separator
+            if separator>0:
+                value_start = separator + 1                               # value start index
+            eol = dict_string.find('\n', value_start)
+            if eol>0:
+                value_end = eol                                           # value end index at end of line
+            else: 
+                value_end = len(dict_string)                              # value end index at end of file
+            dict_string = dict_string[0:value_start] + ' ' + value + dict_string[value_end:]
+        # Write string to dict file
+        with open(filePathName, 'w') as fp:
+            fp.write(dict_string)
+                    
     def get_filePath(self, the_dict):
+        """Get file path to the dictionary file location."""
         return self.filePaths[self.dicts.index(the_dict)]
 
     def get_filePathName(self, the_dict):
+        """Get file path to the dictionary file location including the dictionary file name."""
         return self.filePathNames[self.dicts.index(the_dict)]
 
     def get_key_values(self, key, dicts=None):