擅长:python、mysql、java
<p>尝试以下代码:</p>
<pre><code>config = {
'g7': {},
'd5': {},
'a9': {},
}
config['g7']['cam_name'] = ('Canon-PS-G7-X-Mark-II')
config['d5']['cam_name'] = ('Nikon-D5')
config['a9']['cam_name'] = ('Sony-alpha9')
camtype = """
1 camera:
({0})
all cameras
({1})
"""
single_camera = config['g7']['cam_name']
all_camera = ', '.join([config[k]['cam_name'] for k in config])
print(camtype.format(single_camera, all_camera))
</code></pre>
<p>输出:</p>
^{pr2}$