如果聲明不止一次，則打印C文件變量

Question

for cVariable in CFile.Variables: 
    occCtr=0 
    for cVar2 in CFile.Variables: 
     if cVariable.Name == cVar2.Name: 
      occCtr+=1 
    if occCtr > 1: 
     res = False 
     errmsg += cVariable.Name + ' is declared more than once ' + '\n' 

這是我的算法。它正在解析一個C文件並發現變量是否被多次聲明。但是，當我打印錯誤消息時，它顯示了兩個具有相同名稱的變量，我只需要從每個變量中打印一個變量。

Answer 1

from collections import Counter 

declarations = Counter(var.Name for var in CFile.Variables) 
duplicates = [ 
    "{} is declared {} times".format(name, times) 
    for name, times in declarations.items() where times > 1 
] 
duplicates.sort() 
error_msg = "\n".join(duplicates)