Mercurial > sypikslang
annotate gamelib/lab.py @ 151:372d886f9e70
New suggest_research() method on Lab.
author | Jeremy Thurgood <firxen@gmail.com> |
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date | Fri, 11 May 2012 20:06:36 +0200 |
parents | 14917385a0fd |
children | a644f6b64a6d |
rev | line source |
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14 | 1 # -*- test-case-name: gamelib.tests.test_lab -*- |
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2 |
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3 from random import random, choice, sample |
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4 |
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5 import networkx |
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49 | 7 from gamelib import research, schematics |
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8 from gamelib.game_base import get_subclasses |
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9 |
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10 |
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11 class ScienceGraph(object): |
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12 def __init__(self, all_science, known_science): |
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13 self.graph = networkx.DiGraph() |
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14 self.all_science = all_science |
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15 self.known_science = known_science |
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16 self.add_all_science() |
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17 self.tag_known_science() |
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18 assert networkx.is_directed_acyclic_graph(self.graph) |
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19 |
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20 def add_all_science(self): |
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21 # Add level 0 of everything to the graph. |
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22 for science in self.all_science: |
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23 self.graph.add_node((science, 0), known=False) |
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24 |
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25 # Walk dependencies and fill in intermediate nodes. |
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26 for science in self.all_science: |
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27 for dep in science.PREREQUISITES: |
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28 self.add_node_string(*dep) |
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29 self.graph.add_edge(dep, (science, 0)) |
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30 |
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31 def add_node_string(self, science, level): |
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32 node = (science, level) |
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33 if node in self.graph: |
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34 return node |
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35 |
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36 # We prepopulate with level 0 of eveything. |
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37 assert level >= 0 |
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38 |
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39 self.graph.add_node(node, known=False) |
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40 parent = self.add_node_string(science, level - 1) |
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41 self.graph.add_edge(parent, node) |
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42 return node |
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43 |
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44 def tag_known_science(self): |
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45 for science in self.known_science: |
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46 # We may know more of this than the graph has. |
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47 self.add_node_string(type(science), science.points + 1) |
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48 for i in range(science.points + 1): |
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49 self.graph.node[(type(science), i)]['known'] = True |
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50 |
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51 def is_known(self, node): |
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52 return self.graph.node[node]['known'] |
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53 |
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54 def distances_to_known(self, science): |
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55 nodes = set() |
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56 nodes_to_check = [(science, 0)] |
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57 |
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58 while nodes_to_check: |
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59 node = nodes_to_check.pop() |
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60 if self.is_known(node) or node in nodes: |
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61 continue |
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62 nodes.add(node) |
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63 nodes_to_check.extend(self.graph.predecessors(node)) |
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64 |
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65 distances = {} |
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66 for node in nodes: |
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67 distances.setdefault(node[0], 0) |
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68 distances[node[0]] += 1 |
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69 |
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70 return distances |
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71 |
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72 def count_unknown(self, sciences): |
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73 return len([s for s in sciences if not self.is_known((s, 0))]) |
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74 |
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75 def find_prospects(self): |
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76 prospects = {'research': [], 'schematic': []} |
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77 for science in self.all_science: |
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78 distances = self.distances_to_known(science) |
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79 if not distances: |
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80 # We already know this thing. |
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81 continue |
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82 # Remove the thing we're trying to get from the distance. |
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83 distances.pop(science) |
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84 if self.count_unknown(distances.keys()) > 0: |
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85 # We only want direct breakthroughs. |
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86 continue |
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87 prospects[science.SCIENCE_TYPE].append( |
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88 (sum(distances.values()), science, distances)) |
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89 return dict((k, sorted(v)) for k, v in prospects.items()) |
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90 |
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91 def find_promising_areas(self, size=3): |
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92 basic_science = False |
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93 areas_for_research = set() |
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94 areas_for_schematics = set() |
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95 prospects = self.find_prospects() |
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96 |
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97 for points, target, distances in prospects['schematic']: |
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98 if points > 0: |
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99 # We need nonzero points in these things. |
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100 areas_for_schematics.update(distances.keys()) |
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101 else: |
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102 # Any of these things qualify us. |
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103 areas_for_schematics.update(p for p, _ in target.PREREQUISITES) |
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104 |
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105 for points, target, distances in prospects['research']: |
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106 if points == 0: |
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107 basic_science = True |
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108 else: |
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109 areas_for_research.update(distances.keys()) |
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110 |
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111 suggestions = [] |
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112 k = min(size, len(areas_for_schematics)) |
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113 suggestions.extend(sample(areas_for_schematics, k)) |
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114 if len(suggestions) < size: |
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115 k = min(size - len(suggestions), len(areas_for_research)) |
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116 suggestions.extend(sample(areas_for_research, k)) |
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117 |
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118 return basic_science, suggestions |
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119 |
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120 |
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121 class Lab(object): |
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122 BASIC_RESEARCH_SUCCESS_RATE = 0.05 |
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123 BASIC_RESEARCH_SUCCESS_MULTIPLIER = 2 |
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124 |
20 | 125 def __init__(self, init_data=None): |
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126 self.science = [] |
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127 self.new_research = get_subclasses(research.ResearchArea) |
49 | 128 self.new_schematics = get_subclasses(schematics.Schematic) |
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129 self.all_science = [s for s in self.new_research + self.new_schematics] |
20 | 130 |
131 if init_data is not None: | |
132 # Load stored state. | |
133 self._load_data(init_data) | |
134 else: | |
135 # New game. | |
136 self._choose_initial_science() | |
137 | |
138 def _load_data(self, init_data): | |
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139 sciences = init_data['science'].copy() |
49 | 140 for science in self.new_schematics + self.new_research: |
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141 # Check if this science is one we should know. |
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142 points = sciences.pop(science.save_name(), None) |
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143 if points is not None: |
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144 # It is! Learn it. |
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145 self._gain_science(science(points)) |
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146 if sciences: |
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147 # We're supposed to know an unknowable thing. :-( |
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148 raise ValueError("Unknown science: %s" % (sciences.keys(),)) |
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149 |
21 | 150 def save_data(self): |
47 | 151 return {'science': dict(s.save_data() for s in self.science)} |
21 | 152 |
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153 def _choose_initial_science(self): |
49 | 154 # We always get all starting schematics. |
155 for schematic in self.new_schematics[:]: | |
156 if schematic.STARTING_PRODUCT: | |
157 self._gain_science(schematic()) | |
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158 |
115 | 159 # We start with Physics, because it's not Philately. |
160 physics = research.Physics() | |
161 self._gain_science(physics) | |
162 new_science = [physics] | |
163 | |
164 # We get two other random sciences with no prerequisites. | |
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165 for science in sample(self.find_new_research(), 2): |
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166 science = science() |
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167 self._gain_science(science) |
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168 new_science.append(science) |
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169 |
49 | 170 # Add a point to each of our sciences, and see if we get schematics. |
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171 self.spend_points(new_science, 0) |
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172 |
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173 def _gain_science(self, science): |
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174 self.science.append(science) |
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175 if isinstance(science, research.ResearchArea): |
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176 self.new_research.remove(type(science)) |
49 | 177 elif isinstance(science, schematics.Schematic): |
178 self.new_schematics.remove(type(science)) | |
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179 |
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180 def spend_points(self, things, basic_research): |
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181 breakthroughs = [] |
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182 |
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183 # First, allocate the points. |
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184 for thing in things: |
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185 assert thing in self.science |
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186 assert thing.can_spend(self, 1) |
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187 thing.spend_point() |
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188 |
49 | 189 # Next, check for schematic breakthroughs and upgrades |
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190 breakthroughs.extend(self.apply_area_research([ |
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191 thing for thing in things |
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192 if isinstance(thing, research.ResearchArea)])) |
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193 |
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194 # Finally, check for research breakthroughs. |
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195 breakthroughs.extend(self.apply_basic_research(basic_research)) |
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196 |
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197 return breakthroughs |
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198 |
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199 def _get_science(self, science_class): |
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200 for science in self.science: |
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201 if isinstance(science, science_class): |
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202 return science |
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203 return None |
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204 |
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205 def meet_requirements(self, science_class, extra=0): |
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206 total_points = 0 |
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207 base_points = 0 |
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208 for science, level in science_class.PREREQUISITES: |
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209 my_science = self._get_science(science) |
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210 if my_science is None: |
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211 return False |
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212 if my_science.points < level: |
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213 return False |
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214 base_points += level |
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215 total_points += my_science.points |
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216 return total_points - base_points >= extra |
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217 |
49 | 218 def find_new_schematics(self): |
219 available_schematics = [] | |
220 for schematic_class in self.new_schematics: | |
221 if self.meet_requirements(schematic_class): | |
222 available_schematics.append(schematic_class) | |
223 return available_schematics | |
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224 |
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225 def find_new_research(self): |
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226 available_research = [] |
14 | 227 for research_class in self.new_research: |
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228 if self.meet_requirements(research_class): |
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229 available_research.append(research_class) |
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230 return available_research |
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231 |
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232 def apply_area_research(self, researches): |
49 | 233 options = [schema for schema in self.find_new_schematics() |
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234 if schema.depends_on(researches)] |
49 | 235 breakthroughs = [schematic for schematic in options |
236 if random() < schematic.ACQUISITION_CHANCE] | |
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237 if breakthroughs: |
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238 breakthrough = choice(breakthroughs)() |
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239 self._gain_science(breakthrough) |
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240 breakthroughs = [breakthrough] |
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241 return breakthroughs |
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242 |
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243 def apply_basic_research(self, basic_research): |
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244 if basic_research <= 0: |
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245 return [] |
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246 |
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247 options = self.find_new_research() |
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248 success_chance = self.BASIC_RESEARCH_SUCCESS_RATE * ( |
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249 self.BASIC_RESEARCH_SUCCESS_MULTIPLIER ** basic_research) |
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250 breakthroughs = [research for research in options |
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251 if random() < success_chance] |
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252 if breakthroughs: |
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253 breakthrough = choice(breakthroughs)(1) |
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254 self._gain_science(breakthrough) |
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255 breakthroughs = [breakthrough] |
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256 return breakthroughs |
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257 |
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258 def suggest_research(self): |
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259 """Suggest research areas to pursue. |
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260 |
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261 Return value is a tuple of (bool, list), where the first element |
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262 indicates whether basic research might pay off and the second contains |
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263 Science classes that can be profitably pursued. |
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264 """ |
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265 graph = ScienceGraph(self.all_science, self.science) |
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266 return graph.find_promising_areas() |