Add to dictionary file in json, python
So, I have a file python_dictionary.json
that contains a dictionary that I want to add, without having to open it every time. Let's say it python_dictionary.json
only contains:
{
key1: value`
}
and I want to add
new_dictionary= { key2:value2 }
Now I am doing:
with open('python_dictionary.json','a') as file:
file.write(json.dumps(new_dictionary,indent=4))
This creates a dictionary like:
{
key1:value1
}
{
key2:value2
}
which is obviously not a real dictionary.
I know this: Add values to an existing json file without overwriting it
but this is about adding one entry, I want to do json.dumps
source to share
It looks like you want to load a dictionary from json, add new key values and write it back. If so, you can do this:
with open('python_dictionary.json','r+') as f:
dic = json.load(f)
dic.update(new_dictionary)
json.dump(dic, f)
( 'r+'
read and write mode , not added because you are overwriting the whole file)
If you want to do the add along with json.dumps, I think you will have to remove the first one {
from the json.dumps line before adding. Something like:
with open('python_dictionary.json','a') as f:
str = json.dumps(new_dictionary).replace('{', ',', 1)
f.seek(-2,2)
f.write(str)
source to share