从伪代码为python中的字符串匹配创建移位表

我试图从我的教科书中获取伪代码，并将其转换为python函数。伪代码用于创建一个移位表，以便与Horspool字符串匹配一起使用

伪代码如下所示：

ShiftTable(P[0..m - 1]) 
//Takes input pattern P[0..m-1] and alphabet of possible characters
//Produces output Table[0..size-1] indexed by alphabet's characters and filled with shift sizes computed by formula
     for i = 0 to size - 1 do Table[i] = m
     for j = 0 to m - 2 do Table[P[j]] = m - 1 - j
     return Table

def BuildShiftTable(pattern):
     m = len(pattern)
     alphabet = [i for i in string.ascii_lowercase]
     print(alphabet)
     for i in alphabet:
         table[i] = alphabet[i]
     for j in m - 2:
         table[pattern[j]] = m-1-j
     return table

我的代码如下：

ShiftTable(P[0..m - 1]) 
//Takes input pattern P[0..m-1] and alphabet of possible characters
//Produces output Table[0..size-1] indexed by alphabet's characters and filled with shift sizes computed by formula
     for i = 0 to size - 1 do Table[i] = m
     for j = 0 to m - 2 do Table[P[j]] = m - 1 - j
     return Table

def BuildShiftTable(pattern):
     m = len(pattern)
     alphabet = [i for i in string.ascii_lowercase]
     print(alphabet)
     for i in alphabet:
         table[i] = alphabet[i]
     for j in m - 2:
         table[pattern[j]] = m-1-j
     return table

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它显然不起作用，但我试图理解如何将伪代码的作用转化为工作代码，因为我不确定伪代码中的第一个for循环是什么意思，如果还没有创建，那么从表列表中获取size-1。感谢您的帮助

我看到的一个问题是，你在m-2中对j说

m-2'是整数，因为'm'是整数；在int中为j编写
没有多大意义。我想你的意思是为范围（0，m-2）内的j编写