Python错误“NameError: 全局名称 'self' 未定义”在同一类中调用另一个方法时

Question

我遇到了一个奇怪的错误：

Traceback (most recent call last):
File "/remote/us01home15/ldagan/python/add_parallel_definition.py", line 36, in <module>
new_netlist.lines=orig_netlist.add_parallel_extention(cell_name,parallel,int(level))
File "/remote/us01home15/ldagan/python/hspice_netlist.py", line 70, in add_parallel_extention
new_cells_definition=self.gen_parallel_hierarchy(num,self.lines[i])
File "/remote/us01home15/ldagan/python/hspice_netlist.py", line 52, in gen_parallel_hierarchy
cell_lines=self.gen_parallel_inst(num_of_parallel,cell_1st_line)
NameError: global name 'self' is not defined

根据我看到的所有教程，从同一个类调用不同的方法是通过 self.method_name 来实现的。

这是一个实例化类的脚本。

#!/depot/Python-3.1.1/bin/python3.1
#gets a netlist and a cell name.
#generates a new netlist with the parallel instanciation
import sys
import re
from operator import itemgetter

sys.path.append('/remote/us01home15/ldagan/python/')
from hspice_netlist import hspice_netlist
command="" # initializing argument string
for l in sys.argv:
    command=command + " " + "".join(l)
print (len(sys.argv))
print (command)
if (len(sys.argv) <4):
    sys.exit("Pleas input original file name & new file name")

orig_netlist=hspice_netlist("file=" +  "".join(sys.argv[1])) #reading new netlist
new_netlist=hspice_netlist("") #empty netlist
match=re.search(r"subckt\s*=\s*(\S+)",command)
if (match):
    cell_name=match.group(1) #cell to be parallelized name
else:
    sys.exit("Please input subckt= <subckt name>")
match=re.search(r"level\s*=\s*(\S+)",command)
if (match):
    level=match.group(1) #levels of netlist name
else:
    sys.exit("Please input level=<level name>")
match=re.search(r"parallel\s*=\s*(\S+)",command)
if (match):
    parallel=match.group(1) #new netlist name
else:
    sys.exit("Please input parallel=<parallel name>")

new_netlist.lines=orig_netlist.add_parallel_extention(cell_name,parallel,int(level))
match=re.search(r"outfile\s*=\s*(\S+)",command)
if (match):
    output_filename=match.group[1]

outfile=open(output_filename,'w')
outfile.write("".join(new_netlist.lines))

类的代码是：

import sys
import re
from collections import defaultdict
class hspice_netlist:
    def __init__(self,cmd):
        cmd_match=re.search(r"file\s*=\s*(\S+)",cmd)
        if (cmd_match):
            filename=cmd_match.group(1)
            self.infile = open(filename, 'r')
            self.lines=self.infile.readlines() #reading the lines
            self.infile.close() #closing filehandle

    def input_lines(self,lines):
                self.lines=lines

    def get_subckt_lines(self,name):
        gotit=0
        ret_lines=[]
        find_sub=re.compile("^.sub\S*\s+"+name, re.IGNORECASE)
        find_end=re.compile('^.ends', re.IGNORECASE)
        for line in self.lines:
            if (not gotit):
                if (find_sub.search(line)):
                    gotit=1
                    ret_lines.append(line)
                else:
                    ret_lines.append(line)
                    if (find_end.search(line)):
                        return ret_lines
        sys.exit("Could not find the lines for circuit " + name + '\n')

    def gen_parallel_inst(num,cell_1st_line):
        ret_lines=[] #starting a fresh!!
        cell_data=re.search(r"^\S+\s+(\S+)(\s+.*)", cell_1st_line)
        cell_name=cell_data.group(1) # got the cell name
        new_cell_name=cell_name + '__' + str(num) # new cell name
        nodes=cell_data.group(2) # interface
        ret_lines.append("".join([".sub ", new_cell_name,nodes,"\n"]))
        iter=num
        if (not (re.search(r"\s+$",nodes))):
            nodes=nodes + ' ' #need a space before the cell name, add if it doesn't exist
        while(iter > 0):
            line="x" + str(iter) + nodes  + cell_name + "\n"
            ret_lines.append(line)
            iter=iter-1
        ret_lines.append(".ends\n") #end of subcircuit definition
        return return_lines

    def gen_parallel_hierarchy(num_of_parallel,level,cell_1st_line):
        '''What that it does: Gets a cell name, then finds that cell's interface definition. It then simply relicates the cell, in parallel, then into hierarchies, ending with new cells' definitions. It is useful  for the HSPICE BA issue. It runs recusively. Currently it supports 1 line for interface definition, and no parameters for the cell @ this time '''
        ret_lines=[]
        cell_lines=self.gen_parallel_inst(num_of_parallel,cell_1st_line)
        ret_lines.extend(cell_lines)
        if (level>0):
            ret_lines.extend(self.gen_parallel_hierarchy(num_of_parallel,level-1,cell_lines[0]))
        return ret_lines



    def add_parallel_extention(self,cell_name,num,level):
        ''' Get a cell name + definitions and generates a new netlist '''
        i=0
        regi=re.compile("^.sub\S*\s+" + cell_name)
        m=-1
        while ( (i+1 < len(self.lines)) &  ( not m )):
            i=i+1
            m=regi.search(lines[i]) #finding the line
        if (not m):
            sys.exit("could not find subcircuit definition of " + cell_name + "\n")
        new_cells_definition=self.gen_parallel_hierarchy(num,self.lines[i])
        i=i-1
        ret_lines=self.lines[0:i] # creating return variable, using extend for performance
        ret_lines.extend(new_cells_definition)
        ret_lines.extend(self.lines[i+1:len(self.lines)])
        return ret_lines

        #get the cell
        #write the level 

我肯定是做错了什么基本的事情，但我不知道是什么。

谢谢你们帮助一个刚接触Python的电气工程新手。

Answer 1

你在两个方法的声明中缺少了self。

这两个方法

def gen_parallel_hierarchy(num_of_parallel,level,cell_1st_line):
def gen_parallel_inst(num,cell_1st_line):

应该是这样的

def gen_parallel_hierarchy(self,num_of_parallel,level,cell_1st_line):
def gen_parallel_inst(self,num,cell_1st_line):

这个错误发生的原因是你在gen_parallel_hierarchy()中没有加上self这个参数，但在出错的那一行却用到了它：

cell_lines=self.gen_parallel_inst(num_of_parallel,cell_1st_line)