擅长:python、mysql、java
<p>如果您真的需要从一开始就初始化整个字典,您可以这样做:</p>
<pre><code>periodDict = {}
groupnames = ['Group{:02d}'.format(nr+1) for nr in range(52)]
binnames = ['Bin{:02d}'.format(nr+1) for nr in range(25)]
tallynames = ['Tally{:02d}'.format(nr+1) for nr in range(12)]
for groupname in groupnames:
periodDict[groupname] = {}
for binname in binnames:
periodDict[groupname][binname] = {}
for tallyname in tallynames:
periodDict[groupname][binname][tallyname] = 0
</code></pre>