The mode of open() for Python file operations

mode	file exists	file does not exist	read	Write	stream location
r	read file content	mistake	√	×	begin
w	Empty file contents	create	×	√	begin
a	keep original content	create	×	√	begin/end
r+	Read and write file content	mistake	√	√	begin
w+	Empty file contents	create	√	√	begin
a+	keep original content	create	√	√	begin/end