读取txt（按列读取）

def read(filename):      #按列读取
    row_count = 12
    f = open(filename)
    dict_all = {}
    for i in range(0, row_count):
        row_list = []
        dict_all[i] = row_list
    while True:
        line = f.readline()
        if line:
            s = line.split('\t')
            for i in range(0, len(s)):
                if i < row_count:
                    dict_all[i].append(float(s[i]))
        else:
            break
    f.close()
    return dict_all