^^Python syntax.

Style guide: PEP8  python/dev/pep-0008

Python BNF.

Lexical analysis reference/lexical_analysis

l'analisi del lessico, per individuare le parole, in gergo "tokens"

physical line

sequence of characters terminated by an end-of-line sequence:
- Unix  ASCII LF (linefeed)
- Windows  ASCII sequence CR LF (carriage return followed by linefeed)
End of input also serves as terminator.

logical line

1 phys line, or more physical lines following the explicit or implicit line joining rules.

valid characters for identifiers

A-Z a-z  uppercase and lowercase letters
0-9 not as first character

_  underscore

Multiline structure non esiste.

Esiste la "stringa su piu' linee", ognuna che termina col simbolo "\".

Non esiste multiline comment.

Multiline expression. Implicitly continued lines.

• expressions in parentheses
• square brackets pairs
• curly braces pairs

can be split over more than one physical line without using backslashes.

es:

month_names = ['Januari', 'Februari', 'Maart',      # These are the
               'April',   'Mei',      'Juni',       # Dutch names
               'Juli',    'Augustus', 'September',  # for the months
               'Oktober', 'November', 'December']   # of the year

Implicitly continued lines can carry comments.

Python vs C >>>

multi-line strings are often used as a replacement for multi-line comment

code blocks are denoted by

    : a colon followed by

       indentation

for i in range(10):
    print(i)    # indentation indicates code block

Import. Private names.

nome privato 1 solo underscore, es: _nome

1. import module                      import all names, anche quelli che iniziano con 1 _
2. from module import *           import only non private
3. from module import name     better to be explicit when importing names from modules,
                                                rather than importing them all with a *

python/tutorial/modules#importing-from-a-package

Recognized escape sequences

Talk

code blocks are denoted by

• indentation
• always preceded by a colon (:) on the previous line.