How do I use string formatting to show BOTH leading zeros and precision of 3?
Question:
I’m trying to represent a number with leading and trailing zeros so that the total width is 7 including the decimal point. For example, I want to represent “5” as “005.000”. It seems that string formatting will let me do one or the other but not both. Here’s the output I get in Ipython illustrating my problem:
In [1]: '%.3f'%5
Out[1]: '5.000'
In [2]: '%03.f'%5
Out[2]: '005'
In [3]: '%03.3f'%5
Out[3]: '5.000'
Line 1 and 2 are doing exactly what I would expect. Line 3 just ignores the fact that I want leading zeros. Any ideas? Thanks!
Answers:
The first number is the total number of digits, including decimal point.
>>> '%07.3f' % 5
'005.000'
Important Note: Both decimal points (.) and minus signs (-) are included in the count.
[Edit: Gah, beaten again]
'%07.3F'%5
The first number is the total field width.
This took me a second to figure out how to do @nosklo’s way but with the .format() and being nested.
Since I could not find an example anywhere else atm I am sharing here.
Example using "{}".format(a)
Python 2
>>> a = 5
>>> print "{}".format('%07.3F' % a)
005.000
>>> print("{}".format('%07.3F' % a))
005.000
Python 3
More python3 way, created from docs, but Both work as intended.
Pay attention to the % vs the : and the placement of the format is different in python3.
>>> a = 5
>>> print("{:07.3F}".format(a))
005.000
>>> a = 5
>>> print("Your Number is formatted: {:07.3F}".format(a))
Your Number is formatted: 005.000
Example using "{}".format(a) Nested
Then expanding that to fit my code, that was nested .format()‘s:
print("{}: TimeElapsed: {} Seconds, Clicks: {} x {} "
"= {} clicks.".format(_now(),
"{:07.3F}".format((end -
start).total_seconds()),
clicks, _ + 1, ((_ + 1) * clicks),
)
)
Which formats everything the way I wanted.
Result
20180912_234006: TimeElapsed: 002.475 Seconds, Clicks: 25 + 50 = 75 clicks.
Important Things To Note:
-
@babbitt: The first number is the total field width.
-
@meawoppl: This also counts the minus sign!…
I’m trying to represent a number with leading and trailing zeros so that the total width is 7 including the decimal point. For example, I want to represent “5” as “005.000”. It seems that string formatting will let me do one or the other but not both. Here’s the output I get in Ipython illustrating my problem:
In [1]: '%.3f'%5
Out[1]: '5.000'
In [2]: '%03.f'%5
Out[2]: '005'
In [3]: '%03.3f'%5
Out[3]: '5.000'
Line 1 and 2 are doing exactly what I would expect. Line 3 just ignores the fact that I want leading zeros. Any ideas? Thanks!
The first number is the total number of digits, including decimal point.
>>> '%07.3f' % 5
'005.000'
Important Note: Both decimal points (.) and minus signs (-) are included in the count.
[Edit: Gah, beaten again]
'%07.3F'%5
The first number is the total field width.
This took me a second to figure out how to do @nosklo’s way but with the .format() and being nested.
Since I could not find an example anywhere else atm I am sharing here.
Example using "{}".format(a)
Python 2
>>> a = 5
>>> print "{}".format('%07.3F' % a)
005.000
>>> print("{}".format('%07.3F' % a))
005.000
Python 3
More python3 way, created from docs, but Both work as intended.
Pay attention to the % vs the : and the placement of the format is different in python3.
>>> a = 5
>>> print("{:07.3F}".format(a))
005.000
>>> a = 5
>>> print("Your Number is formatted: {:07.3F}".format(a))
Your Number is formatted: 005.000
Example using "{}".format(a) Nested
Then expanding that to fit my code, that was nested .format()‘s:
print("{}: TimeElapsed: {} Seconds, Clicks: {} x {} "
"= {} clicks.".format(_now(),
"{:07.3F}".format((end -
start).total_seconds()),
clicks, _ + 1, ((_ + 1) * clicks),
)
)
Which formats everything the way I wanted.
Result
20180912_234006: TimeElapsed: 002.475 Seconds, Clicks: 25 + 50 = 75 clicks.
Important Things To Note:
@babbitt: The first number is the total field width.
@meawoppl: This also counts the minus sign!…