状态机

基本结构/状态机/81.py

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+import cppy.cp_util as util
+from collections import Counter  
+
+class WordFrequencyStateMachine:  
+    def __init__(self, file_path):  
+        self.file_path = file_path  
+        self.content = None  
+        self.words = None  
+        self.word_freq = None  
+        self.state = 'IDLE'  
+  
+    def transition_to_read_file(self):  
+        try:  
+            with open(self.file_path, 'r', encoding='utf-8') as file:  
+                self.content = file.read()  
+                self.state = 'WORDS_SPLIT'  
+        except FileNotFoundError:  
+            print(f"文件 {self.file_path} 未找到。")  
+        except Exception as e:  
+            print(f"读取文件时发生错误: {e}")  
+  
+    def transition_to_split_words(self):  
+        if self.content is not None:  
+            self.words = util.extract_str_words(self.content)
+            self.state = 'CALCULATE_FREQ'  
+        else:  
+            print("文件内容为空，无法分割单词。")  
+  
+    def transition_to_calculate_freq(self):  
+        if self.words is not None:  
+            self.word_freq = Counter(self.words)  
+            self.state = 'DONE'  
+        else:  
+            print("单词列表为空，无法计算词频。")  
+  
+    def run(self):  
+        while self.state != 'DONE':  
+            if self.state == 'IDLE':  
+                self.transition_to_read_file()  
+            elif self.state == 'WORDS_SPLIT':  
+                self.transition_to_split_words()  
+            elif self.state == 'CALCULATE_FREQ':  
+                self.transition_to_calculate_freq()  
+            else:  
+                print(f"未知状态: {self.state}")  
+                break  
+  
+        return self.word_freq  
+  
+# 使用状态机计算词频  
+state_machine = WordFrequencyStateMachine( util.testfilepath )  
+word_frequencies = state_machine.run()  
+  
+# 打印结果  
+for word, freq in word_frequencies.most_common(10):  
+    print(f"{word}: {freq}")