Python points from the perspective of a C programmer

I've only come to C languages such as C, C ++, and C #, but I decided to study machine learning, which is popular now, and studied Python. List the characteristic points seen from the C language programmer.

Syntax features

• There are no block comments, and line comments use #.
• You can specify the encoding rule coding:.
• Supports standard JavaDoc-like document strings.
• Control blocks are represented by indentation instead of curly braces {}. (Is it like VBA?)

Literal features

It is suitable for numerical calculation as a whole because it has no limit on the number of digits and has an imaginary number. On the other hand, it is not suitable for embedded environments where memory usage is unreadable and memory is cheap. (Well, why not use it for that purpose ...)

• String and byte string literals
• Almost the same as C language.
• Numeric literals
• Integer
• Only one type of int type with no limit on the number of digits.
• Can be expressed in binary, octal, decimal and hexadecimal numbers.
• Floating point number
• Only one type of double precision floating point number. There are no single precision floating point numbers.
• Imaginary number
• Integer or floating point number with j at the end to represent an imaginary number.

Primitive type features

A great variety of primitive types. What is implemented in the object type of the standard library in Java and C language is implemented in the primitive type in Python. Primitive types have advantages such as a smaller amount of code than object types and a cleaner appearance. On the other hand, there is a disadvantage that it is troublesome until you learn how to write primitive types.

• Numeric type
• There are integers, floating point numbers, complex numbers, and Boolean values.
• The substance of the Boolean value False, True is 0, 1. (C language-like)
• Sequence type
• A data type that represents an ordered set. There are types such as strings, lists, and tuples. The treatment is slightly different depending on the type.
• Collective type
• A data type that represents an unordered set. There are two types, a set and a Frozen set.
• Mapping type
• An unordered set tagged with the appropriate index. Only dictionaries belong to the mapping type.

Control syntax features

Rich in simple sentences. Is the compound statement equivalent to Java?

• Simple sentence
• A simple sentence is a sentence that can be contained in a single line. In C language, there are return, break, continue, etc ... and so on.
• Compound sentence
• There are ʻif, while, for, try, with` statements.

Summary

In the case of C language and Java, the policy was to provide only basic functions in the language type system, and to provide convenient object types and methods in the standard library. Python, on the other hand, packed the language's type system with as many useful features as possible to improve productivity.

Productivity has improved, but compatibility is a concern. It seems that Python3 is basically not backward compatible with Python2, but I don't want Python4? To have the same thing ...