Why can't I join this tuple in Python?
Question:
e = ('ham', 5, 1, 'bird')
logfile.write(','.join(e))
I have to join it so that I can write it into a text file.
Answers:
join() only works with strings, not with integers. Use ','.join(str(i) for i in e).
join only takes lists of strings, so convert them first
>>> e = ('ham', 5, 1, 'bird')
>>> ','.join(map(str,e))
'ham,5,1,bird'
Or maybe more pythonic
>>> ','.join(str(i) for i in e)
'ham,5,1,bird'
Use the csv module. It will save a follow-up question about how to handle items containing a comma, followed by another about handling items containing the character that you used to quote/escape the commas.
import csv
e = ('ham', 5, 1, 'bird')
with open('out.csv', 'wb') as f:
csv.writer(f).writerow(e)
Check it:
print open('out.csv').read()
Output:
ham,5,1,bird
You might be better off simply converting the tuple to a list first:
e = ('ham', 5, 1, 'bird')
liste = list(e)
','.join(liste)
e = ('ham', 5, 1, 'bird')
logfile.write(','.join(e))
I have to join it so that I can write it into a text file.
join() only works with strings, not with integers. Use ','.join(str(i) for i in e).
join only takes lists of strings, so convert them first
>>> e = ('ham', 5, 1, 'bird')
>>> ','.join(map(str,e))
'ham,5,1,bird'
Or maybe more pythonic
>>> ','.join(str(i) for i in e)
'ham,5,1,bird'
Use the csv module. It will save a follow-up question about how to handle items containing a comma, followed by another about handling items containing the character that you used to quote/escape the commas.
import csv
e = ('ham', 5, 1, 'bird')
with open('out.csv', 'wb') as f:
csv.writer(f).writerow(e)
Check it:
print open('out.csv').read()
Output:
ham,5,1,bird
You might be better off simply converting the tuple to a list first:
e = ('ham', 5, 1, 'bird')
liste = list(e)
','.join(liste)