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<pre><code>x = ['../../scene/temp_5a/458754/1_car.png',
'../../scene/temp_5a/458754/2_car.png',
'../../scene/temp_5a/458754/10_car.png',
'../../scene/temp_5a/458754/15_car.png',
'../../scene/temp_5a/458754/3_car.png']
sorted(x,key=lambda x: int(x.split('/')[-1].split('_car')[0]))
Out[118]:
['../../scene/temp_5a/458754/1_car.png',
'../../scene/temp_5a/458754/2_car.png',
'../../scene/temp_5a/458754/3_car.png',
'../../scene/temp_5a/458754/10_car.png',
'../../scene/temp_5a/458754/15_car.png']
</code></pre>