[{‘name1‘:‘Jack‘},{‘name2‘:‘Lara‘}]------>得到[name1, name2]
for循环嵌套，列表生成式写法：
alist=[{‘name1‘:‘Jack‘},{‘name2‘:‘Lara‘}]
b = [j for one in alist for j in one]
print(b)
for循环嵌套，普通写法：
alist=[{‘name1‘:‘Jack‘},{‘name2‘:‘Lara‘}]
blist=[]
for one in alist:
for k,v in one.items():
blist.append(k)
print(blist)
[{‘a‘:‘1‘,‘b‘:‘11‘},{‘a‘:‘2‘,‘b‘:‘21‘},{‘a‘:‘3‘,‘b‘:‘31‘}]------>得到[‘1‘, ‘2‘, ‘3‘]
b = [one.pop(‘a‘) for one in alist] print(b)
python——for循环嵌套，写成一个列表生成式(列表生成式中列表嵌套字典)
原文：https://www.cnblogs.com/Lara1798/p/12858825.html