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AA = ['a', 'b', 'c']
for i in range(len(AA)):
AA[i] = []
print a
Traceback (most recent call last):
File "C:/test.py", line 6, in <module>
print a
NameError: name 'a' is not defined
AA = ['a', 'b', 'c']
for i in range(len(AA)):
temp = AA[i]
temp = []
print a
>>> p=[]
>>> p.append([])
>>> p.append([])
>>> p.append([])
>>> p
[[], [], []]
>>> d=zip(['a','b','c'],[[],[],[]])
>>> d
[('a', []), ('b', []), ('c', [])]
A = ['a', 'b', 'c']
t = []
for i in range(len(A)):
t.append([])
B = zip (A, t)
print B
B[0][1].append('100')
B[0][1].append('20')
B[0][1].append('40')
print B[0][1]
print B
[('a', []), ('b', []), ('c', [])]
['100', '20', '40']
[('a', ['100', '20', '40']), ('b', []), ('c', [])]
A = ['a', 'b', 'c']
dic = {}
dic [A[0]] = []
print dic
print A[0]
print dic.get(A[0])
for i in range(len(A)):
dic [A[i]] = []
print A[i]
print dic.get(A[i])
{'a': []}
a
[]
a
[]
b
[]
c
[]
AA = ['a', 'b', 'c']
for i in range(len(AA)):
globals()[AA[i]] = []
print a
print AA[0]
结果:
[]
a
AA = ['a', 'b', 'c']
for i in range(len(AA)):
setattr(__builtins__, AA[i], [])
print a
print AA[0]
结果:
[]
a
AA = ['a', 'b', 'c']
for i in range(len(AA)):
__import__('sys')._getframe(0).f_globals[AA[i]] = []
print a
print AA[0]
结果:
[]
a
AA = ['a', 'b', 'c']
for i in range(len(AA)):
exec('AA[i] = []')
print AA[2]
print c
结果:
[]
[]
AA = ['a', 'b', 'c']
print AA[0]
print type(AA[0])
AA[0] = []
print a