4.5 fpformat -- Floating point conversions
The fpformat module defines functions for dealing with
floating point numbers representations in 100% pure
Python. Note:
This module is unneeded: everything here could
be done via the % string interpolation operator.
The fpformat module defines the following functions and an exception:
- fix(x, digs)
-
Format x as
[-]ddd.dddwith digs digits after the point and at least one digit before. Ifdigs <= 0, the decimal point is suppressed.x can be either a number or a string that looks like one. digs is an integer.
Return value is a string.
- sci(x, digs)
-
Format x as
[-]d.dddE[+-]dddwith digs digits after the point and exactly one digit before. Ifdigs <= 0, one digit is kept and the point is suppressed.x can be either a real number, or a string that looks like one. digs is an integer.
Return value is a string.
- exception NotANumber
- Exception raised when a string passed to fix() or sci() as the x parameter does not look like a number. This is a subclass of ValueError when the standard exceptions are strings. The exception value is the improperly formatted string that caused the exception to be raised.
Example:
>>> import fpformat >>> fpformat.fix(1.23, 1) '1.2'
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Release 2.2, documentation updated on December 21, 2001.