Python從txt檔案中逐行讀取資料

# -*-coding:utf-8-*-
import os

for line in open("./samples/label_val.txt"):
    print('line=',  line, end = '')  #後面跟 , end = ''將忽略換行符
#line= ./samples/images/3-3_5460e99f0ca9c410960571e02a0d273c.bmp
#line= ./samples/images/5-5_f391afef5c574a0659039595a038ef92.bmp
#line= ./samples/images/2-2_518e32236467c850a268ed2ec1d68697.bmp

'''
file_obj = open("./samples/label_val.txt")
all_lines = file_obj.readlines() #讀取全部內容
for line in all_lines:
    print('line=', line)
file_obj.close()

# 寫之前，先檢驗檔案是否存在，存在就刪掉
if os.path.exists("./samples/label_val.txt"):
    os.remove("./samples/label_val.txt")
mylist = ["luoluo", "taotao", "mumu"]
 
# 以寫的方式開啟檔案，如果檔案不存在，就會自動建立
file_write_obj = open("./samples/label_val.txt", 'w')
for var in mylist:
    file_write_obj.writelines(var)
    file_write_obj.write('\n')
file_write_obj.close()
'''