擅长:python、mysql、java
<p>您需要的是<code>global</code>关键字</p>
<pre class="lang-py prettyprint-override"><code>PDFFILE = ""
def pdf_btnClicked():
global PDFFILE
PathOfPDF = askopenfile()
PDFFILE = PathOfPDF.name
print(PDFFILE)
# You need to call `pdf_btnClicked()` function
book = open(PDFFILE, 'rb')
</code></pre>