python读取文件中的一行有效数据

1
1123
1y211
121&*dd99

0000
01
23
0111

993
d
984

total = []

with open('t1.txt') as fd:
cur = []
Data = []
data = []
for line in fd:
line = line.rstrip()
line = line.lstrip()
cur.append(line)
if line.isdigit():
Data.append(line)
data.append(int(line))

print(cur)
print(Data)
print(data)

['1', '1123', '1y211', '121&*dd99', '', '0000', '01', '23', '0111', '', '993', 'd', '984']
['1', '1123', '0000', '01', '23', '0111', '993', '984']
[1, 1123, 0, 1, 23, 111, 993, 984]