为什么此函数不将文本文件中的值附加到我的列表中？

Question

def read1(file):                #this function will read and extract the first column of values from the
    with open(file,"r") as b:        # text allowing us to access it later in our main function
        list1 = list(b)
        lines = b.readlines()
        result1 = []
        for i in lines:
            result1.append(list1.split()[0])
    b.close
    return result1
x = read1("XRD_example1.txt")

是否有清晰可见的错误？

Answer 1

你做到了：

    list1 = list(b)
    lines = b.readlines()

但是这些行中的第一行已经读完了文件的所有内容，第二行没有任何内容可读。

def read1(file):                #this function will read and extract the first column of values from the
    with open(file,"r") as b:        # text allowing us to access it later in our main function
        lines = b.readlines()
        result1 = []
        for i in lines:
            result1.append(i.split()[0])
    # no need for close, when using 'with open()'
    return result1

应该可以，甚至更好：

def read1(file):                
    with open(file,"r") as b: 
        return [i.split()[0] for i in b.readlines()]

为什么此函数不将文本文件中的值附加到我的列表中？

Why won't this function append values from the textfile to my list?

python

list

append

readfile

python-3.x