{{tag>Brouillon Python}}

= Brouillon - Python
=   Python


== Debug


https://www.youtube.com/watch?v=HHrVBKZLolg

== V env

https://sametmax.com/les-environnement-virtuels-python-virtualenv-et-virtualenvwrapper/

== Basic

https://sametmax.com/trier-un-csv-de-5-go/

Assert
https://sametmax.com/programmation-par-contrat-avec-assert/

[expression for element in sequence]

[element.upper() for element in sequence]
print(['a' * nombre for nombre in sequence])
sequence = [(nombre, list(range(nombre))) for nombre in sequence]

<code python>
if is_ok:
    print(welcome)
else:
    print(error)

print(welcome if is_ok else error)
</code>


=== String

Source : /usr/share/apport/package-hooks/source_apparmor.py
<code python>
import codecs


def stringify(s):
    '''Converts a byte array into a unicode string'''
    return codecs.latin_1_decode(s)[0]
</code>    
    

== lambda

https://www.journaldev.com/37089/how-to-compare-two-lists-in-python
https://realpython.com/python-lambda/

== Other module

from itertools import groupby
from collections import defaultdict


== Doc

pydoc

en format texte
python3 -m pydoc mon_module
python3 -m pydoc mon_module.ma_fonction

en format html
python3 -m pydoc -w mon_module
python3 -m pydoc -w mon_module.ma_fonction


== IPython 

python3 -m IPython

== POO

https://marshmallow.readthedocs.io/en/latest/

=== Les dataclasses

Voir 
https://sametmax.com/python-3-7-sort-de-sa-coquille/

<code python>
from dataclasses import dataclass
 
@dataclass
class Achat:
    produit: str
    prix: float
    quantite: int = 0
    
</code>


    
== Trio

https://sametmax.com/super-article-invite-sur-trio-que-lauteur-a-oublie-de-titrer/

== Linter / Formater


https://sametmax.com/once-you-go-black-you-never-go-back/
https://linuxfr.org/news/python-partie-9-formateur-de-code-analyse-statique


== IDE

https://sametmax.com/je-fais-mon-coming-out/


== Autres

<code python>
import sys
import math
from contextlib import redirect_stdout


def compute_join_point(s_1, s_2):
    # Write your code here
    # To debug: print("Debug messages...", file=sys.stderr, flush=True)
    
    return 0

# Ignore and do not change the code below
def main():
    s_1 = int(input())
    s_2 = int(input())
    with redirect_stdout(sys.stderr):
        res = compute_join_point(s_1, s_2)
    print(res)

if __name__ == "__main__":
    main()
    
</code>


<code python>
import sys
import math
from contextlib import redirect_stdout


def find_network_endpoint(start_node_id, from_ids, to_ids):
    # Write your code here
    # To debug: print("Debug messages...", file=sys.stderr, flush=True)
    
    return 0

# Ignore and do not change the code below
def main():
    start_node_id = int(input())
    n = int(input())
    #from_ids = [int(i) for i in input().split()]
    #to_ids = [int(i) for i in input().split()]
    from_ids = [1 7 3 4 2 6 9]
    to_ids = [3 3 4 6 6 9 5]
    with redirect_stdout(sys.stderr):
        endPointId = find_network_endpoint(start_node_id, from_ids, to_ids)
    print(end_point_id)

if __name__ == "__main__":
    main()

1 7 3 4 2 6 9
3 3 4 6 6 9 5
--------------------------
</code>

Touch file
<code python>
open(new_file_path, "wb").close()  # create new file in working tree
</code>