<p>我希望我正确理解了你的问题。当累计销售总额大于5且IsSuccess==True时,此示例将减去必要值(“重置”):</p>
<pre class="lang-py prettyprint-override"><code>df["SumSale"] = df["Sale"].cumsum()
# "reset" when SumSale>5 and IsSuccess==True
m = df["SumSale"].gt(5) & df["IsSuccess"].eq(True)
df.loc[m, "to_remove"] = df["SumSale"]
df["to_remove"] = df["to_remove"].ffill().shift().fillna(0)
df["SumSale"] -= df["to_remove"]
df = df.drop(columns="to_remove")
print(df)
</code></pre>
<p>印刷品:</p>
<pre class="lang-none prettyprint-override"><code> Sale IsSuccess SumSale
0 1 False 1.0
1 2 True 3.0
2 3 False 6.0
3 2 False 8.0
4 4 True 12.0
5 3 False 3.0
6 5 True 8.0
7 5 False 5.0
</code></pre>
<hr/>
<p>编辑:</p>
<pre class="lang-py prettyprint-override"><code>def fn():
sale, success = yield
cum = sale
while True:
sale, success = yield cum
if success and cum > 5:
cum = sale
else:
cum += sale
s = fn()
next(s)
df["ss"] = df["IsSuccess"].shift()
df["SumSale"] = df.apply(lambda x: s.send((x["Sale"], x["ss"])), axis=1)
df = df.drop(columns="ss")
print(df)
</code></pre>
<p>印刷品:</p>
<pre class="lang-none prettyprint-override"><code> Sale IsSuccess SumSaleExpected SumSale
0 10 False 10 10
1 2 True 12 12
2 2 False 2 2
3 1 False 3 3
4 3 True 6 6
5 2 False 2 2
6 1 True 3 3
7 3 False 6 6
8 5 False 11 11
9 5 False 16 16
</code></pre>