擅长:python、mysql、java
<p>您没有在内部函数中返回<code>infile</code>变量。更正版本为:</p>
<pre class="lang-py prettyprint-override"><code>def safeOpen(fileName):
try:
infile = open(fileName)
print('Opened')
except:
print('None')
return infile
def avgSpd():
fileName = input('Enter the file name: ')
infile = safeOpen(fileName)
content = infile.read()
return content
</code></pre>