[Solved] Python 2.7: Accessing value from dictionary using string [closed]

The command

str="str1",'str2'

creates a tuple in the variable str, and is equivalent to doing

str = ('str1', 'str2')

Note that this is probably the underlying cause of your confusion… you are creating a tuple but putting it in a variable with a name that indicates you expected a string.

When you do

str1 = 'str1'
str2 = 'str2'
dict.get(str1+"','"+str2)
# The above is equivalent to
# mystr = str1+"','"+str2
# dict.get(mystr)

you are trying to access the key "str1','str2", which is not in the dictionary. You want to access the tuple ('str1', 'str2').

To do this, try

str1 = 'str1'
str2 = 'str2'
mytuple = str1, str2 # or mytuple = (str1, str2)
dict.get(mytuple)
# or dict.get((str1, str2)) # Note the extra parentheses

I am obliged to say that str and dict are bad names for a variables because they shadow the python builtin functions str and dict.