python中如何添加切片_Python将字符串切片或添加到列表中的字符串

list_of_lists = [['PARENT', 'ID', 'DESCRIPTION1', 'DESCRIPTION2'],

['', 'R1', 'R1_Des_1', '0'],

['C1', 'E1', 'E1_Des_1', '1'],

['P1', 'C1', 'C1_Des_1', '2'],

['R1', 'P1', 'P1_Des_1', '3'],

['C2', 'E2', 'E2_Des_1', '4'],

['P2', 'C2', 'C2_Des_1', '5'],

['R1', 'P2', 'P2_Des_1', '6'],

['P2', 'C3', 'C3_Des_1', '7'],

['C4', 'E3', 'E3_Des_1', '8'],

['P3', 'C4', 'C4_Des_1', '9'],

['R2', 'P3', 'P3_Des_1', '10'],

['None', 'R3', 'R3_Des_', '11'],

['P3', 'C5', 'C5_Des_1', '12'],

['C6', 'E4', 'E4_Des_1', '13'],

['P4', 'C6', 'C6_Des_1', '14'],

['R2', 'P4', 'P4_Des_1', '15'],

['C7', 'E5', 'E5_Des_1', '16'],

['P5', 'C7', 'C7_Des_1', '17'],

['R3', 'P5', 'P5_Des_1', '18'],

['C9', 'E6', 'E6_Des_1', '19'],

['P6', 'C9', 'C9_Des_1', '20'],

['R3', 'P6', 'P6_Des_1', '21'],

['P6', 'C8', 'C8_Des_1', '22'],

['C10', 'E7', 'E7_Des_1', '23'],

['P7', 'C10', 'C10_Des_1', '24'],

['R4', 'P7', 'P7_Des_1', '25'],

['P7', 'C11', 'C11_Des_1', '26'],

['C12', 'E8', 'E8_Des_1', '27'],

['P8', 'C12', 'C12_Des_1', '28'],

['R4', 'P8','','29'],

['', 'P8','','30'],

['R1', 'P8','','31'],

['', 'z1','','32'],

['z1', 'z2','','33'],

['z1', 'z3','','34'],

['z2', 'z4','','35'],

['z3', 'z4','','36']]

list_of_lists_slice = list(list_of_lists)

list_string = []

for sublist in list_of_lists_slice:

for element in sublist:

if len(element) > 8:

element = element[:7]

if len(element) < 8:

space = 8 - len(element)

element = element + (' ' * space)

for sublist in list_of_lists_slice:

row_str = str(' |')

ele_str = '|'.join(sublist)

row_str = row_str + ele_str + ('| ')

list_string.append(row_str)

middle = (' ')

middle = middle + str((len(sublist)) * (9 * ('-')))

list_string.append(middle)

for row in list_string:

print (row)