关于 Python 中字典的小问题/问题

Question

im doing a homework for school and i need to compare a variable of "months" with a dictionary (number/month name)i tried to use.values() but when i "launch" the code that don't do anything,thanks and sorry for my english:]

Calendrier={1:"janvier",2:"février",3:"mars",4:"avril",5:"mai",6:'juin',
7:"juillet",8:"août",9:"septembre",10:"octobre",11:"novembre",12:"décembre"}
Volume=15500
Mois=1
Volume_Maximale=25000

while Volume<=Volume_Maximale:
    Volume=Volume*0.9+2500
    Mois=Mois+1

print("Le bassin débordera le mois de",Calendrier.values(Mois),"car il aura un volume de",Volume)

Answer 1

The dictionary is accessed as a key so just put:

Calendrier[Mois]

Answer 2

At first there are some coding conventions when programming in python, I will 'correct' everything you did 'wrong' (it's not a must to do it so, but it's still recommended).

calendrier = (
    "janvier",
    "février",
    "mars",
    "avril",
    "mai",
    "juin",
    "juillet",
    "août",
    "septembre",
    "octobre",
    "novembre",
    "décembre"
)
volume = 15500
mois = 1
volume_maximale = 25000

while volume <= volume_maximale:
    volume = volume*0.9+2500
    mois = mois+1

# you have plenty possibilities to manipulate string
print("Le bassin débordera le mois de " + calendrier[mois-1] + " car il aura un volume de " + volume)

# if you are using pythoin 3.6 or later i would recommend the following
print(f"Le bassin débordera le mois de {calendrier[mois-1]} car il aura un volume de {volume}")
# its called f-string as you see you can directly write variables inside the string wrapped in curly braces
# for python 3.6 or later it is the fastes way manipulating strings

As you can see I have edited some more things. For example you have used a dictionary for the months. It is definitly legitement, but since the months don't changes and you dont need the functionality of an dictionary it is a better approach to use a tuple in this case. You could use a list too, but since tuples are immutable and lists are, but you don't need to edit the list again you should use a tuple. But there is one "disadvantage"; the variable "mois" need to start at 0 now, because a list index starts at 0. Therefore you need to substract 1 from that variable to get the right month when accessing the "calendrier" tuple.