这样写为什么打印不出来数组内容，但是打印出来一共有多少个元素了

李博

def dayin(x,y):
    listOne = y.split(':')
    one = listOne[0]
    two = listOne[1]

    len1 = len(one)
    len2 = len(two)

    oneFile = open(x,'r', encoding='UTF-8')

    alllines = len(oneFile.readlines())
    onelist = oneFile.readlines()
    print('读取文件的内容%s++++%s' % (onelist,alllines))

# x 是文件路径

永恒的蓝色梦想

def dayin(x,y):
    listOne = y.split(':')
    one = listOne[0]
    two = listOne[1]

    len1 = len(one)
    len2 = len(two)

    oneFile = open(x,'r', encoding='UTF-8')

    onelist = oneFile.readlines()
    alllines = len(onelist)
    print('读取文件的内容%s++++%s' % (onelist,alllines))

qiuyouzhi

因为你读取了一次（len那里），这时候文件指针已经到末尾了
第一种可以用楼上的方法，第二种可以试试f.seek(0,0)?

Twilight6

因为你readlines 两次，read和readlines 会改变文件的‘指针’位置，如果你读到最后，下一次就是空的

def dayin(x,y):
    listOne = y.split(':')
    one = listOne[0]
    two = listOne[1]

    len1 = len(one)
    len2 = len(two)

    oneFile = open(x,'r', encoding='UTF-8')
    onelist = oneFile.readlines()
    alllines = len(onelist)
    
    print('读取文件的内容%s++++%s' % (onelist,alllines))