Python frequency analysis

    import pandas as pd
    raw = pd.read_csv('work/金庸-射雕英雄传txt精校版.txt',names=['txt'],sep="aaa",encoding="GBK")
    print(len(raw))
    raw
    
    
      
      
      
      
    

    #章节判断用变量预处理
    def m_head(tmpstr):
    return tmpstr[:1]
    def m_mid(tmpstr):
    return tmpstr.find("回 ")
    
    
    raw['head']=raw.txt.apply(m_head)
    raw['mid']=raw.txt.apply(m_mid)
    raw['len']=raw.txt.apply(len)
    
    raw.head(50)