New submission from Raymond Hettinger <[EMAIL PROTECTED]>:
Let bin() show floating point values. This would contribute quite a
bit to people's understanding of floating point arithmetic. It has a
nice education value and it makes it easier to diagnose floating point
mysteries.
def vis(f):
""" Show binary representation of a floating point number:
>>> vis(math.pi)
'0b11.001001000011111101101010100010001000010110100011'
>>> vis(-0.375)
'-0b0.011'
"""
f, sign = (f, '') if f >= 0 else (-f, '-')
n, d = f.as_integer_ratio() if isinstance(f, float) else (f, 1)
n, d = map(lambda x: bin(x)[2:], (n, d))
n = n.rjust(len(d), '0')
s = list(n)
s.insert(len(n) - len(d) + 1, '.')
return sign + '0b' + ''.join(s)
----------
components: Interpreter Core
messages: 67525
nosy: rhettinger
severity: normal
status: open
title: Let bin() show floats
type: feature request
versions: Python 2.6, Python 3.0
_______________________________________
Python tracker <[EMAIL PROTECTED]>
<http://bugs.python.org/issue3008>
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