Check if key has a certain value in dictionary Python

I am currently writing a program in Python.

One of its main purposes is to obtain items in such a manner that you are required to build different items first. (May be confusing, not to worry.)

Here is my code (With formatting issues apparently);

def options():
    command = input("Tree {T}, Mine {M}")
    if command == "M" and '':
        print("Mining...")
        time.sleep(5)
        print("Almost done...")
        time.sleep(2)
        print("You have recieved;")
        stone = random.randint(2,4) 
        print(stone, "stone")
        for items in inventory:
              if items == "stone":
                  inventory[items] = inventory.get('stone')+stone
        other = random.randint(1,2)
        if random.randint(1,5) == 2:
              print(other, "other")
              for items in inventory:
                  if items == "other":
                      inventory[items] = inventory.get('other')+other

The conditional statement on line 2 is left unfinished, which I need help with. I would like to check if there is a value in a dictionary but it has to have a certain key with it.