python之在python中读取和操作文件

def ints(filename): 
    a = [] 
    f = open(filename, "r") 
    lines = f.readlines() 
    f.close() 
    for line in lines: 
        numbers = line.split() 
        for number in numbers:             
            a.append(int(number)) 
    return a 

到目前为止，这是我的函数，我希望能够读取包含整数和字符(如“x”和“b”等)的文件并返回仅包含整数的列表。目前该函数只能处理包含整数的文件。

如何修改它以排除字符或字母？

请您参考如下方法:

这是我对您的代码所做的编辑，它的表现符合您的预期。

  def ints(filename): 
        """A function that takes the filename of a file as an input arguement, computs and returns a list of 
        integers of all the numbers in the file.""" 
        a = [] 
        f = open(filename, "r") 
        lines = f.readlines() 
        f.close() 
        for line in lines: 
            for character in line: 
                try: 
                    a.append(int(character)) 
                except ValueError: 
                    pass 
        return a