Iteration Through tuple of dictionaries in Python

Question

I am trying to iterate through a tuple of dictionaries using Python, get the value that I'm looking for and then modify another dictionary with that value. Example:

Dict = {'1': 'one', '2': 'three'}
Tuple = ({'1': 'one', '5': 'five'}, {'4': 'four', '2': 'two'})

My goal is to modify Dict and replace 'three' with 'two' from my second dictionary in my tuple.

I know how to iterate through dictionaries using for loops and dict.items(), but i can't seem to do so with tuple...

Any help will be much appreciated!

• Cory Kramer: Can you show your expected output? Will Dict have all of the key/value pairs from the Tuple dicts?
• Froodo: my Dict will not necessarily include all of the key/value from the Tuple dicts but Tuple dicts will certainly have all of the key/value from Dict..Hope that makes sense
• Max Spencer: What should the program do if Tuple contains two dictionaries with a key that matches a key in Dict, for example: Tuple = ({'1': 'one', '5': 'five'}, {'4': 'four', '2': 'two'}, {'2': 'six'})?
• Froodo: @MaxSpencer good question but I will never have that. :)

Answer 1

Just check each dict d for the key and then set Dict["2"] equal to d["2"].

Dict = {'1': 'one', '2': 'three'}
Tuple = ({'1': 'one', '5': 'five'}, {'4': 'four', '2': 'two'})
for d in Tuple:
 if "2" in d:
 Dict["2"] = d["2"]

If you have multiple dicts in Tuple that have the same key the value will be set to the last dict you encounter. If you wanted the first match you should break in the if.

Dict = {'1': 'one', '2': 'three'}
Tuple = ({'1': 'one', '5': 'five'}, {'4': 'four', '2': 'two'})
for d in Tuple:
 if "2" in d:
 Dict["2"] = d["2"]
 break # get first match

If you want the last match it would be better start at the end of Tuple:

for d in reversed(Tuple):
 if "2" in d:
 Dict["2"] = d["2"]
 break # last dict in Tuple that has the key

• Froodo: i dont need two for loops on d?
• Max Spencer: Seems unlikely that the OP literally just wants to replace items with key '2', can you clarify if this is the goal @Froodo?
• Padraic Cunningham: @Froodo, no, if "2" in d will see if the key exists in the dict, there is no need to iterate over the keys and it is actually less efficient .
• Padraic Cunningham: @MaxSpencer, that is irrelevant, the logic is what is important. They also commented stating they know the specific key they want to look for.
• Froodo: @MaxSpencer, I already know what keys i need to replace everytime. I have a marker that defines that since i dont want to modify them everytime. :)