我正在为实用程序功能编写doctest以生成浮点数序列。但是，我无法匹配正在生成的某些中间值。不确定为什么某些值是长十进制。
def frange(initial, final, increment):
""" Return the list of numbers in float format.
>>> frange(0, 0.7, 0.1)
[0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7]
"""
lst = []
while(final > initial):
lst.append(initial)
initial += increment
return lst
File "foo.py", line 4, in __main__.frange
Failed example:
frange(0, 0.7, 0.1)
Expected:
[0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7]
Got:
[0, 0.1, 0.2, 0.30000000000000004, 0.4, 0.5, 0.6]
**********************************************************************
1 items had failures:
1 of 1 in __main__.frange
***Test Failed*** 1 failures.