I have some dictionaries as follows
d1={}
d2={}
d3={}
Values of dictionary keys contains list
and a list,
l1=[d1,d2,d3]
list contains names of all the dictionaries available. I want to iterate through all dictionaries available through the list which contains all dictionary names.
How can i access all this dictionaries through list ?
>>> l1 = [d1,d2,d3]
>>> for d in l1:
for k,v in d.items():
print(k,v)
A better example
d1 = {"a":"A"}
d2 = {"b":"B"}
d3 = {"c":"C"}
l1 = [d1,d2,d3]
for d in l1:
for k,v in d.items():
print("Key = {0}, Value={1}".format(k,v))
Produces
>>>
Key = a, Value=A
Key = b, Value=B
Key = c, Value=C
If they contain only the names of the dictionaries i.e "d1" you can do something like this (which produces the same result as above):
d1 = {"a":"A"}
d2 = {"b":"B"}
d3 = {"c":"C"}
l1 = ['d1','d2','d3']
for dname in l1:
for k,v in globals()[dname].items():
print("Key = {0}, Value={1}".format(k,v))
Though I wouldn't recommend such an approach. (note: you could also you locals() if the dictionaries were in the local scope)
When you have a dictionary which has a list associated with a key you can go over the list like so:
d1 = {"a":[1,2,3]}
d2 = {"b":[4,5,6]}
l1=["d1","d2"]
for d in l1:
for k,v in globals()[d].items(): #or simply d.items() if the values in l1 are references to the dictionaries
print("Dictionray {0}, under key {1} contains:".format(d,k))
for e in v:
print("\t{0}".format(e))
Producing
Dictionray d1, under key a contains:
1
2
3
Dictionray d2, under key b contains:
4
5
6
d1 = {'a': [1,2,3], 'b': [4,5,6]}
d2 = {'c': [7,8,9], 'd': [10,11,12]}
d3 = {'e': [13,14,15], 'f': [16,17,18]}
l1 = [d1,d2,d3]
for idx, d in enumerate(l1):
print '\ndictionary %d' % idx
for k, v in d.items():
print 'dict key:\n%r' % k
print 'dict value:\n%r' % v
Produces:
dictionary 0
dict key:
'a'
dict value:
[1, 2, 3]
dict key:
'b'
dict value:
[4, 5, 6]
dictionary 1
dict key:
'c'
dict value:
[7, 8, 9]
dict key:
'd'
dict value:
[10, 11, 12]
dictionary 2
dict key:
'e'
dict value:
[13, 14, 15]
dict key:
'f'
dict value:
[16, 17, 18]
Do you need "gettattr"?
http://docs.python.org/2/library/functions.html#getattr
http://effbot.org/zone/python-getattr.htm
class MyClass:
d1 = {'a':1,'b':2,'c':3}
d2 = {'d':4,'e':5,'f':6}
d3 = {'g':7,'h':8,'i':9}
myclass_1 = MyClass()
list_1 = ['d1','d2','d3']
dict_of_dicts = {}
for k in list_1:
dict_of_dicts[k] = getattr(myclass_1, k)
print dict_of_dicts
or if you want to apply this "globally" read how to use "getattr" relative to a module here: __getattr__ on a module
