擅长:python、mysql、java
<p>看起来您的字符串格式末尾多了一个“%”。此外,您将.csv错误地连接到文件名的末尾。“。csv“必须是字符串。你知道吗</p>
<pre><code>>>> from datetime import datetime
>>> thisweek = datetime.now().date().strftime("%Y%m%d%")
>>> file = "filename_" + thisweek + ".csv"
>>> print(file)
filename_20191202%.csv
</code></pre>
<p>应该是:</p>
<pre><code>>>> from datetime import datetime
>>> thisweek = datetime.now().date().strftime("%Y%m%d")
>>> file = "filename_" + thisweek + ".csv"
>>> print(file)
filename_20191202.csv
</code></pre>