How to print a percentage value in python?
PythonPython 2.xPython Problem Overview
this is my code:
print str(float(1/3))+'%'
and it shows:
0.0%
but I want to get 33%
What can I do?
Python Solutions
Solution 1 - Python
format
supports a percentage floating point precision type:
>>> print "{0:.0%}".format(1./3)
33%
If you don't want integer division, you can import Python3's division from __future__
:
>>> from __future__ import division
>>> 1 / 3
0.3333333333333333
# The above 33% example would could now be written without the explicit
# float conversion:
>>> print "{0:.0f}%".format(1/3 * 100)
33%
# Or even shorter using the format mini language:
>>> print "{:.0%}".format(1/3)
33%
Solution 2 - Python
There is a way more convenient 'percent'-formatting option for the .format()
format method:
>>> '{:.1%}'.format(1/3.0)
'33.3%'
Solution 3 - Python
Just for the sake of completeness, since I noticed no one suggested this simple approach:
>>> print("%.0f%%" % (100 * 1.0/3))
33%
Details:
%.0f
stands for "print a float with 0 decimal places", so%.2f
would print33.33
%%
prints a literal%
. A bit cleaner than your original+'%'
1.0
instead of1
takes care of coercing the division to float, so no more0.0
Solution 4 - Python
Just to add Python 3 f-string solution
prob = 1.0/3.0
print(f"{prob:.0%}")
Solution 5 - Python
You are dividing integers then converting to float. Divide by floats instead.
As a bonus, use the awesome string formatting methods described here: http://docs.python.org/library/string.html#format-specification-mini-language
To specify a percent conversion and precision.
>>> float(1) / float(3)
[Out] 0.33333333333333331
>>> 1.0/3.0
[Out] 0.33333333333333331
>>> '{0:.0%}'.format(1.0/3.0) # use string formatting to specify precision
[Out] '33%'
>>> '{percent:.2%}'.format(percent=1.0/3.0)
[Out] '33.33%'
A great gem!
Solution 6 - Python
Then you'd want to do this instead:
print str(int(1.0/3.0*100))+'%'
The .0
denotes them as floats and int()
rounds them to integers afterwards again.
Solution 7 - Python
I use this
ratio = round(1/3, 2)
print(f"{ratio} %")
output: 0.33 %