Python从txt文件中逐行读取数据

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Python从txt文件中逐行读取数据

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

for line in open("./samples/label_val.txt"):
    print('line=',  line, end = '')  #后面跟 , end = ''将忽略换行符
#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() #读取全部内容
for line in all_lines:
    print('line=', line)
file_obj.close()

# 写之前，先检验文件是否存在，存在就删掉
if os.path.exists("./samples/label_val.txt"):
    os.remove("./samples/label_val.txt")
mylist = ["luoluo", "taotao", "mumu"]
 
# 以写的方式打开文件，如果文件不存在，就会自动创建
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()
'''