CODEWITHSUNDEEP
python-3.x
epinsten
epinsten

Reputation: 119

Create a file whose name is determined by the Date

I am trying to use python to make a file that takes in the date and then creates a file with it. This program is going to run all day every day and every new day I want a new file to be made with that day date and then for the file to be used. I don't get why my code will not allow that to work.

The code shows that if the file does not open it will get a FileNotFoundError and then I have it make the file but it seems to not be making the time. However if I take {date} out it will make the file.

I've tested if it is {date} and it seems to be it but it is a string so I don't get it

import time
import csv

timestr = time.localtime() # get time
date= time.strftime("%m/%d/%Y", timestr)

filename = (f"Readings/Readings{date}.csv")

try: 
    f = open(filename, 'r')
except FileNotFoundError:
    print("File not found, making file")
    with open(filename, 'w+') as file_object:
        writer = csv.writer(file_object)
        writer.writerow(['Test'])
        file_object.close()
else:
    print('yes')

Error: 

Exception has occurred: FileNotFoundError
[Errno 2] No such file or directory: 'Readings/Readings09/18/2019.csv
File "/home/pi/Desktop/script/script.py", line 17, in <module> with open(filename, 'w+') as file_object:
File "/usr/lib/python3.7/runpy.py", line 85, in _run_code exec(code, run_globals)
File "/usr/lib/python3.7/runpy.py", line 96, in _run_module_code mod_name, mod_spec, pkg_name, script_name)
File "/usr/lib/python3.7/runpy.py", line 263, in run_path pkg_name=pkg_name, script_name=fname)

Upvotes: 0

Views: 308

Answers (3)

farrokh
farrokh

Reputation: 1

get rid of the / in the date part: change this: "%m/%d/%Y" to "%m-%d-%Y"

Upvotes: 0

Michele
Michele

Reputation: 3061

Because the date you're using contains slashes "/". You can try to use os.makedirs(os.path.dirname(filename), exist_ok=True), to create the subfolder before creating the file.

Upvotes: 0

Manjunath Rao
Manjunath Rao

Reputation: 4260

Make sure you have a Reading folder or Create one using os.makedirs

import time
import csv


timestr = time.localtime() # get time
date= time.strftime("%m/%d/%Y", timestr).replace('/','_')

filename = (f"Readings/Readings{date}.csv")

try: 
    f = open(filename, 'r')
except FileNotFoundError:
    print("File not found, making file")
    with open(filename, 'w+') as file_object:
        writer = csv.writer(file_object)
        writer.writerow(['Test'])
        file_object.close()
else:
    print('yes')

Upvotes: 1

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