以一种有意义的方式命名分隔符`:`

Question

In the following code:

In [5]: if 2 > 1 & 1 > 0:
   ...:     print("True")
   ...:     
True

I know that: > is comparative operator,
& is logic/bitwise operator,
= is assignment operator,

How about colon : ? How could I name it an abstract concept rather than colon:

In [6]: def foo(): return 3
In [7]: foo()
Out[7]: 3

In the above codes, : act as = assignment.

I checked the official docs 2. Lexical analysis — Python 3.6.6 documentation

2.6. Delimiters
The following tokens serve as delimiters in the grammar:

(       )       [       ]       {       }
,       :       .       ;       @       =       ->
+=      -=      *=      /=      //=     %=      @=
&=      |=      ^=      >>=     <<=     **=
The period can also occur in floating-point and imaginary literals. 

I noticed that all the delimiters have appropriate meaning: ( for tuple, [ for list constructor, @ for decorator, , for true delimiter, . for attribute access.

Excluding : ?

How could I name it in a meaning way?

Answer 1

: is simply part of the syntax of a compound statement that indicates the end of the clause header.

From the documentation of compound statements :

Compound statements consist of one or more 'clauses.' A clause consists of a header and a 'suite.' The clause headers of a particular compound statement are all at the same indentation level. Each clause header begins with a uniquely identifying keyword and ends with a colon .