By default, Python 3 source files are encoded in UTF-8 and all strings are Unicode strings.
The first character of the identifier must be a letter of the alphabet or an underscore _. The rest of the identifier consists of letters, numbers, and underscores. Identifiers are case-sensitive.
Comments Single-line comments in Python start with #, and comments are intended to be human and have a specific meaning
Multi-line comments can use multiple # signs, as well as “” and” “” : for example:” “All multi-line comments are comments.
Lines and indents Indent to represent blocks of code without curly braces {}, which is a Python feature. But Python is very strict about indentation, so multiple Spaces and TAB indentation must be consistent