我是一名大一药学专业新生，正在做一个小组项目，对于一位博主的程序不太理解，关于文件导入，以及缩进哪里出了问题还不太清楚，希望可以有会python和gephi的专业人士看一看，真的谢谢您了

-- coding: utf-8 --

import os,sys,xlrd,codecs,math

pp=os.getcwd()
yao_ming_list=[]
yao_xing_list=[]
yao_dict = {} # 药名-出现次数(即权重)字典 {'麻黄':4 ，‘桂枝’：22， }
relationships = {} # 关系字典 { '麻黄'： { '桂枝'：2，‘生甘草’：3} , }
lineYaos = [] # 每段内药物关系

da_ta = xlrd.open_workbook('%s\yao_ming_xing_wei.xlsx'% (pp))
table_ling = da_ta.sheets()[0]
hangshu_ling = table_ling.nrows

for i in range(0,hangshu_ling):
print(i)
row_ling_data=table_ling.row_values(i)
yao_ming=table_ling.cell_value(i,0)
yao_xing=table_ling.cell_value(i,2)
yao_ming_list.append(yao_ming)
yao_xing_list.append(yao_xing)

#print(yao_ming_list,yao_xing_list)

with codecs.open("%s\chu_fang.txt"% (pp), "r", "utf8") as f:
for line in f.readlines():
#print(line)

            wo_rds = line.split( )
            lineYaos.append([])
            for wo_rd in wo_rds:
                    if wo_rd in yao_ming_list:
                            lineYaos[-1].append(wo_rd)
                            if yao_dict.get(wo_rd) is None:
                                    yao_dict[wo_rd] = 0
                                    relationships[wo_rd]  = {} 
                            yao_dict[wo_rd] +=1
                            #print(wo_rd)

#print(yao_dict,lineYaos)

for line in lineYaos:
for yao0 in line:
for yao1 in line:
if yao0 == yao1:
continue
if relationships[yao0].get(yao1) is None:
relationships[yao0][yao1]=1
else:
relationships[yao0][yao1] = relationships[yao0][yao1] + 1

#print(relationships)
with codecs.open("%s\node.txt"% (pp), "w", "gbk") as f:
f.write("Id Label Weight Yaoxing\r\n")
for yao_er, yao_er_cishu in yao_dict.items():
xuhao_yaoming=yao_ming_list.index(yao_er)
yaoxing_node=yao_xing_list[xuhao_yaoming]
f.write(yao_er + " " + yao_er + " "+ str(yao_er_cishu) + " " + yaoxing_node + "\r\n")

with codecs.open("%s\edge.txt"% (pp), "w", "gbk") as f:
f.write("Source Target Weight\r\n")
for zhu_yao, edges in relationships.items():
for fu_yao, pin_ci in edges.items():
if pin_ci > 0:
f.write(zhu_yao + " " + fu_yao + " " + str(pin_ci) + "\r\n")

os.rename("%s\node.txt"% (pp),"%s\node.csv"% (pp))
os.rename("%s\edge.txt"% (pp),"%s\edge.csv"% (pp))