有人可以帮我写代码吗？ （Python）

Question

So I get this error message:

Traceback (most recent call last):
  File "C:/Users/Ethan/Documents/Coding/test2.py", line 3, in <module>
    buy = input("Marijuana plants cost 200$ ea, opium seeds cost 300$")
  File "<string>", line 1, in <module>
NameError: name 'm' is not defined

I bet it will be obvious but, I'm new to python and need some help.

code:

balance = 2500
FinalPrice = 0
buy = input("Marijuana plants cost 200$ ea, opium seeds cost 300$")     
while (buy != "o") and (buy != "m"):
    buy = input("That's not on the market! type 'm' if you want to buy Marijuana and 'o' if you want opium!")
if buy =="o":
    o = input("How many opium seeds? Press c to cancel")
    if o=="0":
        o = input("invalid number, input again")
    elif o =="c":
       input("You cancelled the trade. Type in a command to do something else")
    oprice = (o*300)
    print(oprice)
    FinalPrice-=FinalPrice
    FinalPrice+=oprice
    obuy = input("This is the final price, press b to buy or c to cancel")
    if obuy =="c":
        input("You cancelled the trade. Type in a command to do something else")
    elif obuy =="b":
        if oprice > balance:
            print("Not enough money! Sell more drugs to earn more money.")
        elif oprice < balance:
            print("you bought", o , "Opium seeds for", oprice , "$")
    input("What do you want to do next?")    
elif buy =="m":
    m = input("How many Marijuana plants? Press c to cancel")
    if m=="0":
        m = input("invalid number, input again")
    elif m =="c":
        input("You cancelled the trade. Type in a command to do something else")
    mprice = (m*200)
    print(mprice)
    FinalPrice-=FinalPrice
    FinalPrice+=mprice
    mbuy = input("This is the final price, press b to buy or c to cancel")
    if mbuy =="c":
        input("You cancelled the trade. Type in a command to do something else")
    elif mbuy =="b":
        if mprice > balance:
            print("Not enough money! Sell more drugs to earn more money.")
        elif mprice < balance:
            print("you bought", m , "Marijuana plants for", mprice , "$")
input("What do you want to do next?")

Any help will be greatly appreciated. I got the m to work, but then I implemented o and it didn't work.

Answer 1

This code is supposed to work on python 3.

If you are using python 2, then wherever you want your input to be of integer type, use

int(raw_input())

to accept the input. Whenever you want it to be a string, simply use

raw_input()