python将文件写成csv文件保存到本地

import csv
import os

path='/tmp/'
file='test.csv'
def generate_csv(path,file):
if not os.path.exists(path):
os.mkdir(path)
files=os.path.join(path,file)
# os.system('touch %s' %files)
with open(files,'w') as f:
writer=csv.writer(f)
writer.writerow(['client_name','os..','path'])
return files

def main():
generate_csv(path,file)

if __name__=='__main__':
main()