python - 如何计算仅包含一个逗号分隔的行数并忽略计算文本文件中两个逗号分隔的行数

Question

我想计算仅包含一个逗号分隔的行数并忽略计算文本文件中两个逗号分隔的行数

下面是我的代码

def countLines(filename):
   with open(filename,'r') as f: 
      CoList = f.split("\n") 
      Counter = 0 
      for i in CoList: 
          if i: 
             Counter += 1 
      return CoList

countLines('demo.txt')

标签： python

Answer 1

我想这就是你想要的？

def countLines(filename):
    with open(filename,'r') as f: 
        Counter = 0 
        for line in f: 
            if line.count(',') == 1:
                Counter += 1 
      return Counter