使用python中的浮点编号的while语句

Question

我试图使用 循环在Python中使用将长字符串插入短字符串中。当我在语句中使用浮动点号时，我会得到意外的行为。预计以下代码将返回5个5个字母的20箱：

sequence = 'TTAGAGGAAATATGAAAACCCTAGAATCGGAAGAAAACTATATATGTATATCTTTCCGTTGACTTTATATAGAATGAAATCAAGGAAAGAAAAGAGCTAA'
seqLength = len(sequence)
bins = 20
binLength = int(round(seqLength / bins))

leftFrame = 0
rightFrame = 0.05
subSeqs = []
while rightFrame <= 1.0:
    subSeq = sequence[int(round(leftFrame * seqLength)) : int(round(rightFrame * seqLength))]
    subSeqs.append(subSeq)
    leftFrame, rightFrame = rightFrame, rightFrame + 0.05

print(f"The sequence is {seqLength} nucleotides. Each bin is {binLength} nt long.")
print(subSeqs, "\n", len(subSeqs))

此返回：

The sequence is 100 nucleotides. Each bin is 5 nt long.
['TTAGA', 'GGAAA', 'TATGA', 'AAACC', 'CTAGA', 'ATCGG', 'AAGAA', 'AACTA', 'TATAT', 'GTATA', 'TCTTT', 'CCGTT', 'GACTT', 'TATAT', 'AGAAT', 'GAAAT', 'CAAGG', 'AAAGA', 'AAAGA'] 
 19

但是，用替换第9行，而RightFrame＆lt; = 1.01：返回正确的输出：

The sequence is 100 nucleotides. Each bin is 5 nt long.
['TTAGA', 'GGAAA', 'TATGA', 'AAACC', 'CTAGA', 'ATCGG', 'AAGAA', 'AACTA', 'TATAT', 'GTATA', 'TCTTT', 'CCGTT', 'GACTT', 'TATAT', 'AGAAT', 'GAAAT', 'CAAGG', 'AAAGA', 'AAAGA', 'GCTAA'] 
 20

添加14个零（1.000000000000001）很好，但是第15个零会再次打破。我应该如何避免这个问题？非常感谢。