擅长:python、mysql、java
<p>如果希望在Python3.x中循环遍历字典,可以使用每个字典中的方法.items(),并用三个循环嵌套它们。你知道吗</p>
<p>通过一个名为hear dict\u total的主字典,这段代码可以实现它。你知道吗</p>
<pre><code>out_region = None
out_value = None
sel_serie = 'Maternal mortality ratio (deaths per 100,000 population)'
min_year = 2005
max_year = 2015
for reg, dict_reg in dict_total.items():
print(reg)
for year, dict_year in dict_reg.items():
if min_year <= year <= max_year:
print(year)
for serie, value in dict_year.items():
if serie == sel_serie and value is not None:
print('{} {}'.format(serie, value))
if out_value is None or out_value < value:
out_value = value
out_region = reg
print('Region: {}\nSerie: {} Value: {}'.format(out_region, sel_serie, out_value))
</code></pre>