I'm trying to make length = 001
in Python 3 but whenever I try to print it out it truncates the value without the leading zeros (length = 1
). How would I stop this happening without having to cast length
to a string before printing it out?
This question is related to
python
python-3.x
math
rounding
Make use of the zfill()
helper method to left-pad any string, integer or float with zeros; it's valid for both Python 2.x and Python 3.x.
Sample usage:
print str(1).zfill(3);
# Expected output: 001
Description:
When applied to a value, zfill()
returns a value left-padded with zeros when the length of the initial string value less than that of the applied width value, otherwise, the initial string value as is.
Syntax:
str(string).zfill(width)
# Where string represents a string, an integer or a float, and
# width, the desired length to left-pad.
I suggest this ugly method but it works:
length = 1
lenghtafterpadding = 3
newlength = '0' * (lenghtafterpadding - len(str(length))) + str(length)
I came here to find a lighter solution than this one!
Python integers don't have an inherent length or number of significant digits. If you want them to print a specific way, you need to convert them to a string. There are several ways you can do so that let you specify things like padding characters and minimum lengths.
To pad with zeros to a minimum of three characters, try:
length = 1
print(format(length, '03'))
There are many ways to achieve this but the easiest way in Python 3.6+, in my opinion, is this:
print(f"{1:03}")
Since python 3.6 you can use fstring :
>>> length = 1
>>> print(f'length = {length:03}')
length = 001
Source: Stackoverflow.com