Specify date in ouput file name using python

Question

My code looks like this

import csv
import datetime

now = datetime.datetime.now()
month_year = (now.month, now.year)
print(month_year)

outputfilename = 'Filename'+month_year+'.csv'
print(outputfilename)

print(month_year) gets me my month year

(11, 2019)

and I would like the date to be in my filename however

outputfilename = 'Filename'+month_year+'.csv'
print(outputfilename)

gives me the following error

    outputfilename = 'Filename'+month_year+'.csv'
TypeError: must be str, not tuple

Any suggestions please?

liorko · Accepted Answer · 2019-11-23 12:45:14Z

1

In the line:
month_year = (now.month, now.year),
you declared the variable month_year as a tuple and not string (as the exception says).

Change the line to this: month_year = now.month

answered Nov 23, 2019 at 12:45

liorko

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Comments

emremrah · Accepted Answer · 2019-11-23 12:48:06Z

1

The error actually explains it: you can't concatenate string with tuple object (monthyear is a tuple here). If you want it to be as something like Filename(11, 2019).csv, you can do it with: outputfilename = 'Filename' + str(month_year) +'.csv'.

But there are many nice naming options instead of Filename(11, 2019).csv. We can help you if you provide the exact output you want.

answered Nov 23, 2019 at 12:48

emremrah

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Xilin Zang · Accepted Answer · 2019-11-23 12:58:20Z

1

In python, you can only use string type with "plus". So I suggest you to change your code to the following format.

import csv
import datetime
now = datetime.datetime.now()
month_year = (now.month, now.year)
print(month_year)
outputfilename = 'Filename'+'_'+str(month_year[0])+'_' + str(month_year[1]) + '.csv'
print(outputfilename)

answered Nov 23, 2019 at 12:58

Xilin Zang

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Prudhvi · Accepted Answer · 2019-11-23 13:01:15Z

1

You can use like this month_year = str(now.month) +"_" + str(now.year) and your filename will be Filename_11_2019.csv.

answered Nov 23, 2019 at 13:01

Prudhvi

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zamir · Accepted Answer · 2019-11-23 13:04:14Z

1

You cannot print tuple/list/int+str so you need to convert your month_year variable into string to be able to use it:

month_year = str((now.month, now.year))

This would give:

'(11, 2019)'

edited Nov 23, 2019 at 13:04

answered Nov 23, 2019 at 12:45

zamir

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