Mercurial > parpg-core

annotate src/parpg/dialogue.py @ 80:84d03dc70904

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Added code that checks if the object is the player so certain actions (talk, attack) will not appear in the menu.
author KarstenBock@gmx.net
date Thu, 08 Sep 2011 18:36:40 +0200
parents 1fd2201f5c36
children
rev   line source
0
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1 # This file is part of PARPG.
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2 #
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3 # PARPG is free software: you can redistribute it and/or modify
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4 # it under the terms of the GNU General Public License as published by
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5 # the Free Software Foundation, either version 3 of the License, or
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6 # (at your option) any later version.
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7 #
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8 # PARPG is distributed in the hope that it will be useful,
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9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 # GNU General Public License for more details.
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12 #
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13 # You should have received a copy of the GNU General Public License
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14 # along with PARPG. If not, see <http://www.gnu.org/licenses/>.
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15 """
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16 Provides classes used to contain and organize dialogue data for use within
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17 in-game dialogues between the player character and NPCs.
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18 """
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19 try:
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20 from collections import OrderedDict
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21 except ImportError:
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22 # Python version 2.4-2.6 doesn't have the OrderedDict
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23 from parpg.common.ordereddict import OrderedDict
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24
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25 class Dialogue(object):
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26 """
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27 Represents a complete dialogue and acts as a container for the dialogue
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28 data belonging to a particular NPC.
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29 """
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30 __slots__ = ['npc_name', 'avatar_path', 'default_greeting',
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31 'greetings', 'sections']
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32
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33 def __init__(self, npc_name, avatar_path, default_greeting, greetings=None,
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34 sections=None):
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35 """
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36 Initialize a new L{Dialogue} instance.
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37
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38 @param npc_name: name displayed for the NPC in the dialogue.
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39 @type npc_name: basestring
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40 @param avatar_path: path to the image that should be displayed as the
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41 NPC's avatar.
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42 @type avatar_path: basestring
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43 @param default_greeting: section of dialogue that should be
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44 displayed when the dialogue is first initiated and no other start
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45 sections are available.
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46 @type default_greeting: L{DialogueSection}
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47 @param greetings: sections of dialogue defining the conditions
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48 under which each should be displayed when the dialogue is first
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49 initiated.
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50 @type greetings: list of
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51 L{RootDialogueSections<DialogueGreeting>}
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52 @param sections: sections of dialogue that make up this
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53 L{Dialogue} instance.
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54 @type sections: list of L{DialogueSections<DialogueSection>}
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55 """
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56 self.npc_name = npc_name
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57 self.avatar_path = avatar_path
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58 self.default_greeting = default_greeting
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59 self.greetings = greetings if greetings is not None else []
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60 self.sections = OrderedDict()
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61 all_sections = [default_greeting]
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62 if (greetings is not None):
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63 all_sections += greetings
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64 if (sections is not None):
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65 all_sections += sections
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66 if (__debug__):
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67 section_ids = [section.id for section in all_sections]
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68 for section in all_sections:
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69 # Sanity check: All DialogueResponses should have next_section_id
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70 # attributes that refer to valid DialogueSections in the Dialogue.
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71 if (__debug__):
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72 for response in section.responses:
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73 assert response.next_section_id in section_ids + \
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74 ['end', 'back'], ('"{0}" does not refer to a '
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75 'DialogueSection in this Dialogue')\
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76 .format(response.next_section_id)
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77 self.sections[section.id] = section
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78
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79 def __str__(self):
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80 """Return the string representation of a L{Dialogue} instance."""
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81 string_representation = 'Dialogue(npc_id={0.npc_name})'.format(self)
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82 return string_representation
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83
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84
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85 class DialogueNode(object):
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86 """
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87 Abstract base class that represents a node or related group of attributes
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88 within a Dialogue.
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89 """
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90 def __init__(self, text, actions=None):
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91 """
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92 Initialize a new L{DialogueNode} instance.
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93
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94 @param text: textual content of the L{DialogueNode}.
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95 @type text: basestring
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96 @param actions: dialogue actions associated with the L{DialogueNode}.
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97 @type actions: list of L{DialogueActions<DialogueAction>}
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98 """
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99 self.text = text
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100 self.actions = actions or []
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101
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102
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103 class DialogueSection(DialogueNode):
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104 """DialogueNode that represents a distinct section of the dialogue."""
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105 __slots__ = ['id', 'text', 'responses', 'actions']
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106
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107 def __init__(self, id_, text, responses=None, actions=None):
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108 """
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109 Initialize a new L{DialogueSection} instance.
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110
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111 @param id_: named used to uniquely identify the L{DialogueSection}
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112 within a L{Dialogue}.
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113 @type id_: basestring
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114 @param text: text displayed as the NPC's part of the L{Dialogue}.
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115 @type text: basestring
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116 @param responses: possible responses that the player can choose from.
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117 @type responses: list of L{DialogueResponses<DialogueResponse>}
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118 @param actions: dialogue actions that should be executed when the
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119 L{DialogueSection} is reached.
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120 @type actions: list of L{DialogueActions<DialogueAction>}
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121 """
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122 DialogueNode.__init__(self, text=text, actions=actions)
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123 self.id = id_
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124 if (responses is not None):
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125 self.responses = list(responses)
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126
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127
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128 class DialogueGreeting(DialogueSection):
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129 """
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130 Represents a root section of dialogue in a L{Dialogue} along with the
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131 conditional statement used to determine the whether this section should be
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132 displayed first upon dialogue initiation.
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133
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134 @ivar id: Name used to uniquely identify the L{DialogueSection} to which
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135 the L{DialogueRootSectionReference} points.
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136 @type id: basestring
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137 @ivar condition: Boolean Python expression used to determine if the
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138 L{DialogueSection} referenced is a valid starting section.
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139 @type condition: basestring
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140 """
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141 __slots__ = ['id', 'condition', 'text', 'actions', 'responses']
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142
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143 def __init__(self, id_, condition, text, responses=None, actions=None):
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144 """
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145 Initialize a new L{DialogueGreeting} instance.
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146
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147 @param id_: named used to uniquely identify the L{DialogueSection}
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148 within a L{Dialogue}.
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149 @type id_: basestring
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150 @param condition: Boolean Python expression used to determine if this
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151 root dialogue section should be displayed.
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152 @type condition: basestring
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153 @param text: text displayed as the NPC's part of the L{Dialogue}.
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154 @type text: basestring
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155 @param responses: possible responses that the player can choose from.
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156 @type responses: list of L{DialogueResponses<DialogueResponse>}
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157 @param actions: dialogue actions that should be executed when the
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158 L{DialogueSection} is reached.
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159 @type actions: list of L{DialogueActions<DialogueAction>}
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160 """
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161 DialogueSection.__init__(self, id_=id_, text=text, responses=responses,
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162 actions=actions)
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163 self.condition = condition
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164
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165
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166 class DialogueResponse(DialogueNode):
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167 """
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168 L{DialogueNode} that represents one possible player response to a
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169 particular L{DialogueSection}.
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170 """
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171 __slots__ = ['text', 'actions', 'condition', 'next_section_id']
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172
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173 def __init__(self, text, next_section_id, actions=None, condition=None):
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174 """
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175 Initialize a new L{DialogueResponse} instance.
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176
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177 @param text: text displayed as the content of the player's response.
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178 @type text: basestring
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179 @param next_section_id: ID of the L{DialogueSection} that should be
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180 jumped to if this response is chosen by the player.
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181 @type next_section_id: basestring
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182 @param actions: dialogue actions that should be executed if this
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183 response is chosen by the player.
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184 @type actions: list of L{DialogueActions<DialogueAction>}
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185 @param condition: Python expression that when evaluated determines
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186 whether the L{DialogueResponse} should be displayed to the player
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187 as a valid response.
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188 @type condition: basestring
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189 """
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190 DialogueNode.__init__(self, text=text, actions=actions)
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191 self.condition = condition
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192 self.next_section_id = next_section_id