擅长:python、mysql、java
<p>变量<code>File</code>超出函数<code>pathValue()</code>的作用域,请在函数内声明它:</p>
<pre><code>def pathValue():
File=""
if File:
print("file path: " + File)
else:
File = "abc.txt"
print("file path: " + File)
pathValue()
</code></pre>
<p>或者将其设为全局变量:</p>
<pre><code>File=""
def pathValue():
global File
if File:
print("file path: " + File)
else:
File = "abc.txt"
print("file path: " + File)
pathValue()
</code></pre>