CODEWITHSUNDEEP
pythonstringfileline
planetp
planetp

Reputation: 16075

Can I use .writelines() for writing a single line to a file?

From the doc on file.writelines():

Write a sequence of strings to the file. The sequence can be any iterable object producing strings, typically a list of strings.

However, writing single lines also works:

>>> with open("/tmp/test", "w") as f:
...     f.writelines("test\n")
... 
>>> with open("/tmp/test") as f:
...     f.readlines()
... 
['test\n']

So I'm wondering if .writelines() can accept single strings as well as sequences of strings. Any links to python 3 documentation would be appreciated.

Upvotes: 0

Views: 190

Answers (1)

GingerPlusPlus
GingerPlusPlus

Reputation: 5616

That's because strings in Python are iterable:

>>>> for char in 'test':
....     print(char)
....
t
e
s
t

So, this code treats your string as iterable, and appends to the file char after char. It might be less efficent than using .write().

Upvotes: 4

Related Questions