I'm experiencing problems with the string format conversion in Python (v2.6.5). I tried to set a string to format like this...
os.system ('/%s/tabix' % (path) '-h -f ftp://<some_url> 4:387-388 > file.out' )
being path='home/john'
But I always get the same error
"Not enough arguments for format string"
I read the documentation, and this post Not enough arguments for format string but i can't find an appropriate answer.
Could someone help me?
Thanks in advance,
peixe
os.system ('/%s/tabix -h -f ftp://<some_url> 4:387-388 > file.out' % (path))
You need to have the format arguments at the end of the string. Not in between two strings.
I think the problem is that you're filling in (path) in the middle of the string without performing an explicit string concatenation at the same time. The best solution is just to make it:
'/%s/tabix -h -f ftp://<some_url> 4:387-388 > file.out' % (path)
What you posted is actually a syntax error. Is something missing?
>>> import os
>>> path='home/john'
>>> os.system ('/%s/tabix' % (path) '-h -f ftp://<some_url> 4:387-388 > file.out' )
File "<stdin>", line 1
os.system ('/%s/tabix' % (path) '-h -f ftp://<some_url> 4:387-388 > file.out' )
^
SyntaxError: invalid syntax
Let me suggest you use
os.system('/{path}/tabix -h -f ftp://<some_url> 4:387-388 > file.out'.format(path=path))
