所以我用一个函数尝试几次打印消息，但是我不断收到相同的错误消息，说我需要定义该函数，但是我确实有，我真的不知道如何解决它，因为我尝试过通过action_message_header（）定义它，但是它不起作用，我尝试搜索它，但是什么也没找到。
结果代码应为：
Hello the four games avaliable are:
0 Mario Cart
1 Minecraft
2 Angry Birds
3 Grabd Theft Auto
What number game do you want? 1
You have chosen Minecraft
What is the level you would like to play at? 1
Begginer
# #
########################################################
#################### ACTION MESSAGE ####################
########################################################
# #
Play Minecraft at Beginner
play Minecraft at Beginner
# #
########################################################
#################### ACTION MESSAGE ####################
########################################################
# #
当前输出为：
Hello the four games avaliable are:
0 Mario Cart
1 Minecraft
2 Angry Birds
3 Grabd Theft Auto
What number game do you want? 2
You have chosen Angry Birds
What is the level you would like to play at? 2
Begginer
Traceback (most recent call last):
File "/Users/megan/Desktop/Digital/Python/mock 1.py", line 86, in <module>
main()
File "/Users/megan/Desktop/Digital/Python/mock 1.py", line 84, in main
actualmessage()
File "/Users/megan/Desktop/Digital/Python/mock 1.py", line 71, in actualmessage
print (action_message_header)
NameError: name 'action_message_header' is not defined
我使用的代码是：
#Ask user what game they would like to play
def game () :
global gametype,gamelist
gamelist = ["Mario Cart","Minecraft","Angry Birds","Grabd Theft Auto"]
gamecount = 0
LENGTH = len(gamelist)
print ("Hello the four games avaliable are:")
while gamecount < LENGTH:
print (gamecount," ",gamelist[gamecount])
gamecount = gamecount + 1
while True:
try:
gamenum = int(input("What number game do you want? "))
if 0 <= gamenum <= LENGTH:
gametype = gamenum
return gamenum
print ("Please enter a number between 0 and",gamecount - 1,)
print ("")
except ValueError:
print ("Please enter a valid value " )
print ("")
gamenum = game ()
print ("You have chosen",gamelist[gamenum],)
print ("")
#Ask game level
def number():
while True:
try:
Level = int(input("What is the level you would like to play at? "))
if Level >= 1 and Level <= 25:
print ("Begginer ")
return ("Beginner")
elif Level >=26 and Level <=75:
print ("Intermediate")
return ("Intermediate")
elif Level >=76 and Level <=100:
print ("Advanced")
return ("Advanced")
else:
print("Out Of range(1-100): Please enter a valid number")
print ("")
except ValueError:
print("Please enter a valid number")
print ("")
#Create a subroutine to print out the action message
def printmessage ():
action_message_header = """
("# #")
("########################################################")
("#################### ACTION MESSAGE ####################")
("########################################################")
("# #")
"""
def actualmessage ():
global stationtype, num
actual_message_header = ("Play "+gamelist[gamenum]+" at"+num)
print (action_message_header)
print (actual_message_header)
print (actual_message_header)
print (action_message_header)
#This is to let the program work
def main ():
global num
num = number()
printmessage ()
actualmessage()
main()
答案 0 :(得分：0)
该函数不返回或打印任何内容。对于该输出，使函数按如下所示打印变量内容：
#Create a subroutine to print out the action message
def printmessage ():
action_message_header = """
# #
########################################################
#################### ACTION MESSAGE ####################
########################################################
# #
"""
print(action_message_header) # print header
def actualmessage ():
global stationtype, num
actual_message_header = "Play "+gamelist[gamenum]+" at"+num
print(actual_message_header) # print actual_message_header
#This is to let the program work
def main ():
global num
num = number()
printmessage ()
actualmessage()
actualmessage()
printmessage ()
main()
运行：
Hello the four games avaliable are:
0 Mario Cart
1 Minecraft
2 Angry Birds
3 Grabd Theft Auto
What number game do you want? 1
You have chosen Minecraft
What is the level you would like to play at? 2
Begginer
# #
########################################################
#################### ACTION MESSAGE ####################
########################################################
# #
Play Minecraft atBeginner
Play Minecraft atBeginner
# #
########################################################
#################### ACTION MESSAGE ####################
########################################################
# #
答案 1 :(得分：0)
尝试这种方式
#Ask user what game they would like to play
def game () :
global gametype,gamelist
gamelist = ["Mario Cart","Minecraft","Angry Birds","Grabd Theft Auto"]
gamecount = 0
LENGTH = len(gamelist)
print ("Hello the four games avaliable are:")
while gamecount < LENGTH:
print (gamecount," ",gamelist[gamecount])
gamecount = gamecount + 1
while True:
try:
gamenum = int(input("What number game do you want? "))
if 0 <= gamenum <= LENGTH:
gametype = gamenum
return gamenum
print ("Please enter a number between 0 and",gamecount - 1,)
print ("")
return gamenum
except ValueError:
print ("Please enter a valid value " )
print ("")
gamenum = game ()
print ("You have chosen",gamelist[gamenum],)
print ("")
#Ask game level
def number():
while True:
try:
Level = int(input("What is the level you would like to play at? "))
if Level >= 1 and Level <= 25:
print ("Begginer ")
return ("Beginner")
elif Level >=26 and Level <=75:
print ("Intermediate")
return ("Intermediate")
elif Level >=76 and Level <=100:
print ("Advanced")
return ("Advanced")
else:
print("Out Of range(1-100): Please enter a valid number")
print ("")
except ValueError:
print("Please enter a valid number")
print ("")
#Create a subroutine to print out the action message
def printmessage ():
print("""
("# #")
("########################################################")
("#################### ACTION MESSAGE ####################")
("########################################################")
("# #")
""")
def actualmessage ():
global stationtype, num
actual_message_header = ("Play "+gamelist[gamenum]+" at"+num)
print (actual_message_header)
printmessage()
#This is to let the program work
def main ():
global num
num = number()
printmessage ()
actualmessage()
main()
输出：
Hello the four games avaliable are:
0 Mario Cart
1 Minecraft
2 Angry Birds
3 Grabd Theft Auto
What number game do you want? 1
You have chosen Minecraft
What is the level you would like to play at? 1
Begginer
("# #")
("########################################################")
("#################### ACTION MESSAGE ####################")
("########################################################")
("# #")
Play Minecraft atBeginner
("# #")
("########################################################")
("#################### ACTION MESSAGE ####################")
("########################################################")
("#
答案 2 :(得分：0)
首先请参见此处，您需要将变量action_message_header声明为global action_message_header，然后按如下所示更改其值：
def game () :
global gametype,gamelist
gamelist = ["Mario Cart","Minecraft","Angry Birds","Grabd Theft Auto"]
gamecount = 0
LENGTH = len(gamelist)
print ("Hello the four games avaliable are:")
while gamecount < LENGTH:
print (gamecount," ",gamelist[gamecount])
gamecount = gamecount + 1
while True:
try:
gamenum = int(input("What number game do you want? "))
if 0 <= gamenum <= LENGTH:
gametype = gamenum
return gamenum
print ("Please enter a number between 0 and",gamecount - 1,)
print ("")
except ValueError:
print ("Please enter a valid value " )
print ("")
gamenum = game ()
print ("You have chosen",gamelist[gamenum],)
print ("")
#Ask game level
def number():
while True:
try:
Level = int(input("What is the level you would like to play at? "))
if Level >= 1 and Level <= 25:
print ("Begginer ")
return ("Beginner")
elif Level >=26 and Level <=75:
print ("Intermediate")
return ("Intermediate")
elif Level >=76 and Level <=100:
print ("Advanced")
return ("Advanced")
else:
print("Out Of range(1-100): Please enter a valid number")
print ("")
except ValueError:
print("Please enter a valid number")
print ("")
#Create a subroutine to print out the action message
def printmessage ():
global action_message_header
action_message_header = "#
#\n" + "########################################################\n" +
"#################### ACTION MESSAGE ####################\n" +
"########################################################\n" + "#
#\n"
def actualmessage ():
global stationtype, num
actual_message_header = ("Play "+gamelist[gamenum]+" at"+num)
print (action_message_header)
print (actual_message_header)
print (actual_message_header)
print (action_message_header)
#This is to let the program work
def main ():
global num
num = number()
printmessage ()
actualmessage()
main()
它给出如下输出：
Hello the four games avaliable are:
0 Mario Cart
1 Minecraft
2 Angry Birds
3 Grabd Theft Auto
What number game do you want? 2
You have chosen Angry Birds
What is the level you would like to play at? 45
Intermediate
# #
########################################################
#################### ACTION MESSAGE ####################
########################################################
# #
Play Angry Birds atIntermediate
Play Angry Birds atIntermediate
# #
########################################################
#################### ACTION MESSAGE ####################
########################################################
# #