python创建每日文件夹

Question

I would like to read from the serial of RPi and store the data in a daily folder as a 'csv.' file. I can create a file, write/read to/from csv file and had the serial comm working with putty for now (tried in a different project). In the future, the comm is going to be between pi and a various sensor. Considering everything else is working I am not sure how to create a seperate file automatically for each day. This is what I've done so far;

import serial
import time
import csv

def readLine(port)
    rv = ""
    while True:
        ch = port.read()
        rv += ch
        if ch == '\r' or ch =='':
            return rv

port = serial.Serial("/dev/ttyAMA0", baudrate = 115200, timeout = 10)

while True:
    rcv=readLineCR(port)

str1 = time.strftime("%d%m%y")
file = open('directory....')

with open('test.csv', 'w') as fp:
     a = csv.writer(fp, delimiter=',')
     # data to be tested
     data = [[str1,'1234'],[str1,'4321']]
     a.writerows(data)
     print('csv is created on: ' + str1)

reader = csv.reader(file)
for line in reader:
print(line)

Any help would be appreciated

Answer 1

使用datetime.datetime.now().strftime("%Y-%d-%m")创建文件夹名称，使用os.path.exists(...)检查文件夹是否存在，并使用os.mkdir(...)创建新文件夹。

Answer 2

Thank you @furas. this is what I did and seems like its working.

import os
todayDate = time.strftime("%d-%m-%y")
directory = '/home/pi/...' + todayDate
if not os.path.exists(directory)
   os.makedirs(directory)