Enter a String for all the Records of a Field

[AzaN]

I have a Text field (Status), which I need to enter a string ('Existing') into all the cells of this field. I have 300 records and prefer to do it via Python or JavaScript. For some reason, I get error messages for my script. Can anyone help me with that? Thanks.

[AzaN]

Sorry but it did not.

[IanMurray]

Why is there even a .str() method option?  There is no .str() method in python......

[DanPatterson_Retired]