python在txt文件的每一行增加关键字
import os
def updateFile(file,str):
"""
在文件的每一行前面增加关键字
:param file:文件名
:param str:关键字
"""
file_data = ""
with open(file, "r") as f:
for line in f:
line = str + line
file_data += line
with open(file,"w") as f:
f.write(file_data)
base_dir = "./labels"
str = "head,"
for file_name in os.listdir(base_dir):
file_name = os.path.join(base_dir, file_name)
print(file_name)
updateFile(file_name, str)
作者:cumtchw