I have a class with instance attributes a,b,c. I used textwrap but it doesnt work.
def __str__(self):
import textwrap.dedent
return textwrap.dedent(
"""#{0}
{1}
{2}
""".format(self.a,self.b,self.c)
However, this is not working, and I am getting output like
a
b
c
When you render a string with """, both newlines AND whitespaces are counted. If you want this to work without dedent, your code should look like this:
def __str__(self):
return """#{0}
{1}
{2}
""".format(self.a,self.b,self.c)
Otherwise, the tabs before {1} and {2} are in the string as well. Alternatively, you could use:
"#{0}\n{1}\n{2}\n".format(self.a,self.b,self.c)
Regarding dedent and why it's not working, note this line from the documentation:
the lines " hello" and "\thello" are considered to have no common leading whitespace.
So if you want dedent to work, you need each line to start the same, so your code should be:
return textwrap.dedent(
"""\
#{0}
{1}
{2}
""".format(self.a,self.b,self.c))
And in this case each line starts with \t, which dedent recognizes and removes.
Do it like this:
from textwrap import dedent
def __str__(self):
return textwrap.dedent("""\
#{0}
{1}
{2}
""".format(self.a,self.b,self.c))
textwrap.dedent strips common leading whitespace (see documentation). If you want this to work, you'll need to do something like this:
def __str__(self):
S = """\
#{0}
{1}
{2}
"""
return textwrap.dedent(S.format(self.a, self.b, self.c))
textwrap.dedentgets rid of common leading whitespace. This means that each line must have the same whitespace in front of it. Clearly, your first line,"#{0}...does not.